Kinect for Xbox One
|Generation||Seventh and eighth-generation eras|
|Units sold||35 million (as of October 25, 2017)|
|Camera||640×480 pixels @ 30 Hz (RGB camera)|
640×480 pixels @ 30 Hz (IR depth-finding camera)
|Connectivity||USB 2.0 (type-A for original model; proprietary for Xbox 360 S)|
|Platform||Xbox 360 |
Microsoft Windows (Windows 7 onwards)
|Predecessor||Xbox Live Vision|
Kinect (codenamed Project Natal during development) is a line of motion sensing input devices produced by Microsoft and first released in 2010. The technology includes a set of hardware originally developed by PrimeSense, incorporating RGB cameras, infrared projectors and detectors that mapped depth through either structured light or time of flight calculations, and a microphone array, along with software and artificial intelligence from Microsoft to allow the device to perform real-time gesture recognition, speech recognition and body skeletal detection for up to four people, among other capabilities. This enables Kinect to be used as a hands-free natural user interface device to interact with a computer system. Kinect is a peripheral that sits atop the user's display similar to a webcam.
Kinect originated as a means to eliminate the game controller from Microsoft's Xbox video game hardware, competing with the Nintendo Wii's own motion-sensing capabilities, hoping to draw a larger audience beyond traditional video game players to the Xbox. Kinect first launched as an add-on for the Xbox 360 in November 2010, and within a few months more than 10 million units had been sold, making it one of the fastest-selling computer hardware products at the time. However, video games had to be developed to specifically incorporate the Kinect's features, and the bulk of games released with Kinect support were family-friendly titles. As Microsoft developed the successor console, the Xbox One, the company had planned to make the second generation of Kinect hardware a required component of the console, giving a reason for developers to seek to take advantage of it. However, the forced inclusion of Kinect raised concerns related to privacy, and among other major changes, Microsoft eventually eliminated the requirement for Kinect to be always connected to the Xbox One, though still bundled Kinect with the console on its release in November 2013. A market for Kinect-based games still did not emerge after the Xbox One's launch, and Microsoft eventually eliminated the Kinect from the Xbox One bundles, while later hardware revisions eliminated the Kinect-specific ports on the console, requiring a special USB adapter instead. By 2018, Microsoft had discontinued all Kinect hardware for video games.
However, Kinect had found an unexpected home for Microsoft in academics and commercial applications, as the Kinect sensor, at the time, was cheaper and more robust compared to other depth-sensing technology applications. Microsoft now considers non-gaming applications, such as in robotics, medicine, and health care, the primary market for Kinect. Shortly after the November 2010 release, users were able to hack into the Kinect and develop hardware drivers and software interfaces to be used on Microsoft Windows personal computers and other systems. Microsoft, after initially objecting to the potential security issues raised by these hacks, changed course and endorsed these efforts, and released its own software development kit for non-commercial applications. The company later rebranded the Kinect hardware into Kinect for Windows in 2012, allowing for commercial applications. A second-generation Kinect for Windows, based on the Xbox One unit, was released in 2014, though Microsoft ultimately terminated this line and directed users to use the Xbox One Kinect as it was functionally equivalent. Following the discontinuation of the Xbox line of Kinect sensors, Microsoft released a non-gaming version as the Azure Kinect, which incorporates Microsoft Azure cloud computing applications among the device's functionalities. Part of the Kinect technology was also used within Microsoft's Hololens project.
|2006||PrimeSense technology shown at GDC|
|2009||"Project Natal" announced|
|2010||Kinect for Xbox 360 released|
|2011||Non-commercial SDK released|
|Commercial SDK released|
|2012||Kinect for Windows released|
|2013||Kinect for Xbox One released with console|
|2014||Kinect 2 for Windows released|
|2017||Discontinuation of Kinect for Xbox hardware|
|2019||Azure Kinect released|
The origins of the Kinect started around 2005, at a point where technology vendors were starting to develop depth-sensing cameras. Microsoft had been interested in a 3D camera for the Xbox line earlier but because the technology had not been refined, had placed it in the "Boneyard", a collection of possible technology they could not immediately work on.
In 2005, PrimeSense was founded by tech-savvy mathematicians and engineers from Israel to develop the "next big thing" for video games, incorporating cameras that were capable of mapping a human body in front of them and sensing hand motions. They showed off their system at the 2006 Game Developers Conference, where Microsoft's Alex Kipman, the general manager of hardware incubation, saw the potential in PrimeSense's technology for the Xbox system. Microsoft began discussions with PrimeSense about what would need to be done to make their product more consumer-friendly: not only improvements in the capabilities of depth-sensing cameras, but a reduction in size and cost, and a means to manufacturer the units at scale was required. PrimeSense spent the next few years working at these improvements.
Nintendo released the Wii in November 2006. The Wii's central feature was the Wii Remote, a handheld device that was detected by the Wii through a motion sensor bar mounted onto a television screen to enable motion controlled games. Microsoft felt pressure from the Wii, and began looking into depth-sensing in more detail with PrimeSense's hardware, but could not get to the level of motion tracking they desired. While they could determine hand gestures, and sense the general shape of a body, they could not do skeletal tracking. A separate path within Microsoft looked to create an equivalent of the Wii Remote, considering that this type of unit may become standardized similar to how two-thumbstick controllers became a standard feature. However, it was still ultimately Microsoft's goal to remove any device between the player and the Xbox.
Kudo Tsunoda and Darren Bennett joined Microsoft in 2008, and began working with Kipman on a new approach to depth-sensing aided by machine learning to improve skeletal tracking. They internally demonstrated this and established where they believed the technology could be in a few years, which led to the strong interest to fund further development of the technology; this has also occurred at a time that Microsoft executives wanted to abandon the Wii-like motion tracking approach, and favored the depth-sensing solution to present a product that went beyond the Wii's capabilities. The project was greenlit by late 2008 with work started in 2009.
The project was codenamed "Natal" after the Brazilian city Natal, Kipman's birthplace. Additionally, Kipman recognized the Latin origins of the word "natal" to mean "to be born", reflecting the new types of audiences they hoped to draw with the technology. Much of the initial work was related to ethnographic research to see how video game players' home environments were laid out, lit, and how those with Wiis used the system to plan how Kinect units would be used. The Microsoft team discovered from this research that the up-and-down angle of the depth-sensing camera would either need to be adjusted manually, or would require an expensive motor to move automatically. Upper management at Microsoft opted to include the motor despite the increased cost to avoid breaking game immersion. Kinect project work also involved packaging the system for mass production and optimizing its performance. Hardware development took around 22 months.
During hardware development, Microsoft engaged with software developers to use Kinect. Microsoft wanted to make games that would be playable by families since Kinect could sense multiple bodies in front of it. One of the first internal titles developed for the device was the pack-in game Kinect Adventures developed by Good Science Studio that was part of Microsoft Studios. One of the game modes of Kinect Adventures was "Reflex Ridge", based on the Japanese Brain Wall game where players attempt to contort their bodies in a short time to match cutouts of a wall moving at them. This type of game was a key example of the type of interactivity they wanted with Kinect, and its developement helped feed into the hardware improvements.
Nearing the planned release, the problem of widespread testing of Kinect in various room types and different bodies accounting for age, gender, and race among other factors, while keeping the details of the unit confidential. Microsoft engaged in a company-wide program offering employees to take home Kinect units to test them. Microsoft also brought other non-gaming divisions, including its Microsoft Research, Microsoft Windows, and Bing teams to help complete the system. Microsoft established its own large-scale manufacturing facility to bulk product Kinect units and test them.
Kinect was first announced to the public as "Project Natal" on June 1, 2009, during Microsoft's press briefing at E3 2009; film director Steven Spielberg had joined Microsoft's Don Mattrick to introduce the technology and its potential. Three demos were shown to showcase Kinect during the briefing—Microsoft's Ricochet and Paint Party, and Lionhead Studios' Milo & Kate created by Peter Molyneux—while a Kinect-enabled version of Criterion Games' Burnout Paradise was shown during the E3 exhibition. By E3 2009, the skeletal mapping technology was capable of simultaneously tracking four people, with a feature extraction of 48 skeletal points on a human body at 30 Hz. Microsoft had not committed to a release date for Kinect at E3 2009, but affirmed it would be after 2009, and likely in 2010 to stay competitive with the Wii and the PlayStation Move (Sony Interactive Entertainment's own motion-sensing system using hand-held devices).
In the months following E3 2009, rumors that a new Xbox 360 console associated with Kinect emerged, either a retail configuration that incorporated Project Natal, or as a hardware revision or upgrade to support Kinect. Microsoft dismissed the reports in public and repeatedly emphasized that Kinect would be fully compatible with all Xbox 360 consoles. Microsoft indicated that the company considered Kinect to be a significant initiative, as fundamental to Xbox brand as Xbox Live, and with a planned launch akin to that of a new Xbox console platform. Microsoft's vice president Shane Kim said the company did not expect Kinect would extend the anticipated lifetime of the Xbox 360, which had been planned to last ten years through 2015, nor delay the launch of the successor to the Xbox 360.
Following the E3 2009 show and through 2010, the Kinect team members experimentally adapted numerous games to Kinect-based control schemes to help evaluate usability. Among these games were Beautiful Katamari and Space Invaders Extreme, which were demonstrated at Tokyo Game Show in September 2009. According to Tsunoda, adding Project Natal-based control to pre-existing games involved significant code alterations, and made it unlikely that existing games could be patched through software updates to support the unit. Microsoft also expanded its draw to third-party developers to encourage them to develop Kinect-based games. Companies like Harmonix and Double Fine quickly took to the Kinect and saw the potential in it, and committed to developing games for the unit, such as the launch title Dance Central from Harmonix.
Although the Kinect's sensor unit was originally planned to contain a microprocessor that would perform operations such as the system's skeletal mapping, Microsoft reported in January 2010 that the sensor would no longer feature a dedicated processor. Instead, processing would be handled by one of the processor cores of Xbox 360's Xenon CPU. Around this time, Kipmen estimated that the Kinect would only take about 10 to 15% of the Xbox 360's processing power. While this was a small fraction of the Xbox 360's capabilities, industry observed believed this further pointed to difficulties in adapting pre-existing games to use Kinect, as the motion-tracking would add to a game's high computational load and exceed the Xbox 360's capabilities. These observed believed that instead the industry would develop games specific to the Kinect features.
At the following E3 2010, Microsoft used its press conference on June 13, 2010, to fully premiere the Kinect hardware, along with a performance by Cirque du Soleil. During the conference, Microsoft revealed the rebranding of Project Natal as "Kinect", which Xbox Live director Stephen Toulouse explained was a portmanteau of the words "kinetic" and "connection", key aspects of the Kinect initiative. Launch dates were also given, with the Kinect to arrive first in North America on November 4, 2010. Microsoft also introduced a revision of the Xbox 360 that was slimmer than the existing model, included a larger 250 GB hard drive, and had a Kinect-ready port: this unit later became known as the Xbox 360 S. In addition to hardware, Microsoft and several other game developers and publishers showed off Kinect-ready titles during the E3 2010 exhibition.
Kinect for Xbox 360 marketing and launch
Microsoft continued to refine the Kinect technology in the months leading to the Kinect launch in November 2010. By launch, Kipman reported they had been able to reduce the Kinect's use of the Xbox 360's processor from 10-15% as reported in January 2010 to a "single-digit percentage".
Microsoft heavily advertised and promoted the Kinect launch. According to The New York Post, Microsoft had a $500 million budget for this marketing. While this claim was widely re-reported, The marketing campaign You Are the Controller, aiming to reach new audiences, included advertisements on Kellogg's cereal boxes and Pepsi bottles, commercials during shows such as Dancing with the Stars and Glee as well as print ads in various magazines such as People and InStyle.
Microsoft gave away Kinect units and Xbox 360 consoles to all members of the audience at the October 19, 2010 The Oprah Winfrey Show, and similarly followed suit two weeks later for Late Night with Jimmy Fallon.
On October 23, 2010, Microsoft held a pre-launch party for Kinect in Beverly Hills. The party was hosted by Ashley Tisdale and was attended by soccer star David Beckham and his three sons, Cruz, Brooklyn, and Romeo. Guests were treated to sessions with Dance Central and Kinect Adventures, followed by Tisdale having a Kinect voice chat with Nick Cannon. Between November 1 and 28, Burger King gave away a free Kinect bundle to a random in-store customer every 15 minutes. A major event was organized on November 3 in Times Square, where singer Ne-Yo performed with hundreds of dancers in anticipation of Kinect's midnight launch.
Kinect was launched in North America on November 4, 2010; in Europe on November 10, 2010; in Australia, New Zealand, and Singapore on November 18, 2010; and in Japan on November 20, 2010. Purchase options for the sensor peripheral include a bundle with the game Kinect Adventures, and as a hardware bundle with Kinect Adventures and the redesigned Xbox 360 S console with either a 4 GB or 250 GB
The Kinect sensor was typical a gloss-black; a Star Wars bundle for the Xbox 360 was released on July 21, 2011 which include the first all-white Kinect unit to match with the themed-console along with the games Kinect Adventures and Kinect Star Wars.
Kinect for Xbox One and decline
The Kinect release for the Xbox 360 was estimated to have sold eight million units in the first sixty days of release, earning the hardware the Guinness World Record for the "Fastest-Selling Consumer Electronics Device". Over 10 million had be sold by March 2011. While seemingly successful, the Kinect had a number of downsides: its launch titles were primarily family-oriented games which may have drawn new audience but did not have the selling power of major video games like Battlefield and Call of Duty, and thus did not have a high attach rate, with only around 20% of the 55 million Xbox 360 users having purchased the unit. It had also been difficult to engage with developers and publishers of these more popular series, since altering their game play away from the controller would be disruptive, even with the added advantages Kinect could provide. The Kinect team recognized some of the downsides with more traditional games and Kinect, and continued ongoing development of the unit to be released as a second-generation unit, such as reducing the latency of motion detection and improving speech recognition. Microsoft provided news of these changes to the third-party developers to help them anticipate how the improvements can be integrated into the games.
Microsoft announced in August 2013 that they had made several changes to the planned Xbox One release in response to the backlash. Among these was that the system would no longer require a Kinect unit to be plugged in to work, though it was still planned to package the Kinect with all Xbox One systems. However, this also required Microsoft to establish a US$500 price-point for the Xbox One/Kinect system at its November 2013 launch, US$100 more than the competing PlayStation 4 launched in the same time frame, which did not include any motion-sensing hardware. In the months after the Xbox One release, Microsoft decided to launch a Kinect-less Xbox One system in March 2014 at the same price as the PlayStation 4, after considering that the Kinect for Xbox One had not gotten the developer support, and sales of the Xbox One were lagging due to the higher price tag of the Kinect-bundled system. Richard Irving, a program group manager that oversaw Kinect, said that Microsoft had felt that it was more important to give developers and consumers the option of developing for or purchasing the Kinect rather than forcing the unit on them.
The removal of Kinect from the Xbox One retail package was the start of the rapid decline and phase-out of the unit within Microsoft. Developers like Harmonix that had been originally targeting games to use the Xbox One had put these games on hold until they knew there was enough of a Kinect install base to justify release, which resulted in a lack of games for the Kinect and reducing any consumer drive to buy the separate unit. Microsoft became bearish on the Kinect, making no mention of the unit at E3 2015 and announcing at E3 2016 that the upcoming Xbox One hardware revision, the Xbox One S, would not have a dedicated Kinect port; Microsoft offered a USB adapter for the Kinect, provided free during an initial promotional period after the console's launch. The more powerful Xbox One X also lacked the Kinect port and required this adapter. Even though developers still released Kinect-enabled games for the Xbox One, Microsoft's lack of statements related to the Kinect during this period led to claims that the Kinect was a dead project at Microsoft.
Microsoft formally announced it would stop manufacture of the Kinect for Xbox One on October 25, 2017. Microsoft eventually discontinued the adapter in January 2018, stating that they were shifting to manufacture other accessories for the Xbox One and personal computers that were more in demand. This is considered by the media to be the point where Microsoft forgone any further work on the Kinect for the Xbox platform.
Non-gaming applications and Kinect for Windows
While the Kinect unit for the Xbox platform had petered out, the Kinect had found new life in academia and other applications since around 2011. The functionality of the unit along with its low US$150 cost was seen to be an inexpensive means to add depth-sensing to existing applications, offsetting the high cost and unreliability of other 3D camera options at the time. In robotics, Kinect's depth-sensing would enable robots to determine the shape and approximate distances to obstacles and maneuver around them. Within the medical field, the Kinect could be used to monitor the shape and posture of a body in a quantifiable manner to enable improved health-care decisions.
Around November 2010, after the Kinect's launch, scientists, engineers, and hobbyists had been able to hack into the Kinect to determine what hardware and internal software it had used, leading to users finding how to connect and operate the Kinect with Microsoft Windows and OS X over USB, which has unsecured data from the various camera elements that could be read. This further led to prototype demos of other possible applications, such as a gesture-based user interface for the operating system similar to that shown in the film Minority Report, as well as pornographic applications. Adafruit Industries, having envisioned some of the possible applications of the Kinect outside of gaming, issued a security challenge related to the Kinect, offering prize money for the successful development of an open source software development kit (SDK) and hardware drivers for the Kinect, which came to be known as Open Kinect. Adafruit named the winner, Héctor Martín, by November 10, 2010, who had produced a Linux driver that allows the use of both the RGB camera and depth sensitivity functions of the device. It was later discovered that Johnny Lee, a core member of Microsoft's Kinect development team, had secretly approached Adafruit with the idea of a driver development contest and had personally financed it. Lee had said of the efforts to open the Kinect that "This is showing us the future...This is happening today, and this is happening tomorrow." and had engaged Adafruit with the contest as he been frustrated with trying to convince Microsoft's executives to explore the non-gaming avenue for the Kinect.
Microsoft initially took issue with users hacking into the Kinect, stating they would incorporate additional safeguards into future iterations of the unit to prevent such hacks. However, by the end of November 2010, Microsoft had turned on their original position and embraced the external efforts to develop the SDK. Kipman, in an interview with NPR, said
The first thing to talk about is, Kinect was not actually hacked. Hacking would mean that someone got to our algorithms that sit inside of the Xbox and was able to actually use them, which hasn't happened. Or, it means that you put a device between the sensor and the Xbox for means of cheating, which also has not happened. That's what we call hacking, and that's what we have put a ton of work and effort to make sure doesn't actually occur. What has happened is someone wrote an open-source driver for PCs that essentially opens the USB connection, which we didn't protect, by design, and reads the inputs from the sensor. The sensor, again, as I talked earlier, has eyes and ears, and that's a whole bunch of noise that someone needs to take and turn into signal.
PrimeSense along with robotics firm Willow Garage and game developer Side-Kick launched OpenNI, a not-for-profit group to develop portable drivers for the Kinect and other natural interface (NI) devices, in November 2010. Its first set of drivers named NITE were released in December 2010. PrimeSense had also worked with ASUS to develop a version Kinect for personal computers for China. The resulting product, the Wavi Xtion, was released in October 2011.
Microsoft announced in February 2011 that it was planning on releasing its own SDK for the Kinect within a few months, and which was officially released on June 16, 2011, but which was limited to non-commercial uses. The SDK enabled users to access the skeletal motion recognition system for up to two persons and the Kinect microphone array, features that had not been part of the prior Open Kinect SDK. Commercial interest in Kinect was still strong, with David Dennis, a product manager at Microsoft, stating "There are hundreds of organizations we are working with to help them determine what's possible with the tech". Microsoft launched its Kinect for Windows program on October 31, 2011, releasing a new SDK to a small number of companies, including Toyota, Houghton Mifflin, and Razorfish, to explore what was possible. At the 2012 Consumer Electronics Show in January, Microsoft announced that it would release a dedicated Kinect for Windows unit along with the commercial SDK on February 1, 2012. the device included some hardware improvements, including support for "near mode" to recognize objects about 50 centimetres (20 in) in front of the cameras. The Kinect for Windows device was listed at US$250, US$100 more than the original Kinect since Microsoft had considered the Xbox 360 Kinect was subsidized through game purchases, Xbox Live subscriptions, and other costs. At the launch, Microsoft stated that more than 300 companies from over 25 countries were working on Kinect-ready apps with the new unit.
With the original announcement of the revised Kinect for Xbox One in 2013, Microsoft also confirmed it would have a second generation of Kinect for Windows based on the updated Kinect technology by 2014. The new Kinect 2 for Windows was launched on July 15, 2014 at a US$200 price. Microsoft opted to discontinue the original Kinect for Windows by the end of 2014. However, in April 2015, Microsoft announced they were also discontinuing the Kinect 2 for Windows, and instead directing commercial users to use the Kinect for Xbox One, which Microsoft said "perform identically". Microsoft stated that the demand for the Kinect 2 for Windows demand was high and difficult to keep up while also fulfilling the Kinect for Xbox One orders, and that they had found commercial developers successfully using the Kinect for Xbox One in their applications without issue.
Integrating Kinect with Microsoft Azure
Microsoft had abandoned the idea of Kinect for video games, but still explored the potential of Kinect beyond that. Microsoft's Director of Communications Greg Sullivan stated in 2018 that "I think one of the things that is beginning to be understood is that Kinect was never really just the gaming peripheral...It was always more." Part of Kinect technology was integrated into Microsoft's Hololens, first released in 2016.
Microsoft announced that it was working on a new version of a hardware Kinect model for non-game applications that would integrate with their Azure cloud computing services in May 2018. The use of cloud computing to offload some of the computational work from Kinect, as well as more powerful features enable by Azure such as artificial intelligence would improve the accuracy of the depth-sensing and reduce the power demand and would lead to more compact units, Microsoft had envisioned. The Azure Kinect device was released on June 27, 2019 at a price of US$400, while the SDK for the unit had been released in February 2019.
The depth and motion sensing technology at the core of the Kinect is enabled through its depth-sensing. The original Kinect for Xbox 360 used structured light for this: the unit used a near-infrared pattern projected across the space in front of the Kinect, while an infrared sensor captured the reflected light pattern. The light pattern is deformed by the relative depth of the objects in front it, and mathematics can be used to estimate that depth based on several factors related to the hardware layout of the Kinect. While other structure light depth-sensing technologies used multiple light patterns, Kinect used as few as one as to achieve a high rate of 30 frames per second of depth sensing. Kinect for Xbox One switched over to using time of flight measurements. The infrared projector on the Kinect sends out modulated infrared light which is then captured by the sensor. Infrared light reflecting off closer objects will have a shorter time of flight than those more distant, so the infrared sensor captures how much the modulation pattern had been deformed from the time of flight, pixel-by-pixel. Time of flight measurements of depth can be more accurate and calculated in a shorter amount of time, allowing for more frames-per-second to be detected.
Once Kinect has a pixel-by-pixel depth image, Kinect uses a type of edge detection here to delineate closer objects from the background of the shot, incorporating input from the regular visible light camera. The unit then attempts to track any moving objects from this, with the assumption that only people will be moving around in the image, and isolates the human shapes from the image. The unit's software, aided by artificial intelligence, performs segmentation of the shapes to try to identify specific body parts, like the head, arms, and hands, and track those segments individually. Those segments are used to construct a 20-point skeleton of the human body, which then can be used by game or other software to determine what actions the person has performed.
Kinect for Xbox 360 (2010)
Kinect for Xbox 360 was a combination of Microsoft built software and hardware. The hardware included a range chipset technology by Israeli developer PrimeSense, which developed a system consisting of an infrared projector and camera and a special microchip that generates a grid from which the location of a nearby object in 3 dimensions can be ascertained. This 3D scanner system called Light Coding employs a variant of image-based 3D reconstruction.
The Kinect sensor is a horizontal bar connected to a small base with a motorized pivot and is designed to be positioned lengthwise above or below the video display. The device features an "RGB camera, depth sensor and microphone array running proprietary software", which provide full-body 3D motion capture, facial recognition and voice recognition capabilities. At launch, voice recognition was only made available in Japan, United Kingdom, Canada and United States. Mainland Europe received the feature later in spring 2011. Currently voice recognition is supported in Australia, Canada, France, Germany, Ireland, Italy, Japan, Mexico, New Zealand, United Kingdom and United States. The Kinect sensor's microphone array enables Xbox 360 to conduct acoustic source localization and ambient noise suppression, allowing for things such as headset-free party chat over Xbox Live.
The depth sensor consists of an infrared laser projector combined with a monochrome CMOS sensor, which captures video data in 3D under any ambient light conditions. The sensing range of the depth sensor is adjustable, and Kinect software is capable of automatically calibrating the sensor based on gameplay and the player's physical environment, accommodating for the presence of furniture or other obstacles.
Described by Microsoft personnel as the primary innovation of Kinect, the software technology enables advanced gesture recognition, facial recognition and voice recognition. According to information supplied to retailers, Kinect is capable of simultaneously tracking up to six people, including two active players for motion analysis with a feature extraction of 20 joints per player. However, PrimeSense has stated that the number of people the device can "see" (but not process as players) is only limited by how many will fit in the field-of-view of the camera.
Reverse engineering has determined that the Kinect's various sensors output video at a frame rate of ≈9 Hz to 30 Hz depending on resolution. The default RGB video stream uses 8-bit VGA resolution (640 × 480 pixels) with a Bayer color filter, but the hardware is capable of resolutions up to 1280x1024 (at a lower frame rate) and other colour formats such as UYVY. The monochrome depth sensing video stream is in VGA resolution (640 × 480 pixels) with 11-bit depth, which provides 2,048 levels of sensitivity. The Kinect can also stream the view from its IR camera directly (i.e.: before it has been converted into a depth map) as 640x480 video, or 1280x1024 at a lower frame rate. The Kinect sensor has a practical ranging limit of 1.2–3.5 m (3.9–11.5 ft) distance when used with the Xbox software. The area required to play Kinect is roughly 6 m2, although the sensor can maintain tracking through an extended range of approximately 0.7–6 m (2.3–19.7 ft). The sensor has an angular field of view of 57° horizontally and 43° vertically, while the motorized pivot is capable of tilting the sensor up to 27° either up or down. The horizontal field of the Kinect sensor at the minimum viewing distance of ≈0.8 m (2.6 ft) is therefore ≈87 cm (34 in), and the vertical field is ≈63 cm (25 in), resulting in a resolution of just over 1.3 mm (0.051 in) per pixel. The microphone array features four microphone capsules and operates with each channel processing 16-bit audio at a sampling rate of 16 kHz.
Because the Kinect sensor's motorized tilt mechanism requires more power than the Xbox 360's USB ports can supply, the device makes use of a proprietary connector combining USB communication with additional power. Redesigned Xbox 360 S models include a special AUX port for accommodating the connector, while older models require a special power supply cable (included with the sensor) that splits the connection into separate USB and power connections; power is supplied from the mains by way of an AC adapter.
Kinect for Windows (2012)
Kinect for Windows is a modified version of the Xbox 360 unit which was first released on February 1, 2011, alongside the SDK for commercial use. The hardware included better components to eliminate noise along the USB and other cabling paths, and improvements in the depth-sensing camera system for detection of objects at close range, as close as 50 centimetres (20 in), in the new "Near Mode".
The SDK included Windows 7 compatible PC drivers for Kinect device. It provided Kinect capabilities to developers to build applications with C++, C#, or Visual Basic by using Microsoft Visual Studio 2010 and included the following features:
- Raw sensor streams: Access to low-level streams from the depth sensor, color camera sensor, and four-element microphone array.
- Skeletal tracking: The capability to track the skeleton image of one or two people moving within Kinect's field of view for gesture-driven applications.
- Advanced audio capabilities: Audio processing capabilities include sophisticated acoustic noise suppression and echo cancellation, beam formation to identify the current sound source, and integration with Windows speech recognition API.
- Sample code and Documentation.
In March 2012, Craig Eisler, the general manager of Kinect for Windows, said that almost 350 companies are working with Microsoft on custom Kinect applications for Microsoft Windows.
In March 2012, Microsoft announced that next version of Kinect for Windows SDK would be available in May 2012. Kinect for Windows 1.5 was released on May 21, 2012. It adds new features, support for many new languages and debut in 19 more countries.
- Kinect for Windows 1.5 SDK would include 'Kinect Studio' a new app that allows developers to record, playback, and debug clips of users interacting with applications.
- Support for new "seated" or "10-joint" skeletal system that will let apps track the head, neck, and arms of a Kinect user - whether they're sitting down or standing; which would work in default and near mode.
- Support for four new languages for speech recognition – French, Spanish, Italian, and Japanese. Additionally it would add support for regional dialects of these languages along with English.
- It would be available in Hong Kong, South Korea, and Taiwan in May and Austria, Belgium, Brazil, Denmark, Finland, India, the Netherlands, Norway, Portugal, Russia, Saudi Arabia, Singapore, South Africa, Sweden, Switzerland and the United Arab Emirates in June.
Kinect for Windows SDK for the first-generation sensor was updated a few more times, with version 1.6 released October 8, 2012, version 1.7 released March 18, 2013, and version 1.8 released September 17, 2013.
Kinect for Xbox One (2013)
An upgraded iteration of Kinect was released on November 22, 2013 for Xbox One. It uses a wide-angle time-of-flight camera, and processes 2 gigabits of data per second to read its environment. The new Kinect has greater accuracy with three times the fidelity over its predecessor and can track without visible light by using an active IR sensor. It has a 60% wider field of vision that can detect a user up to 3 feet from the sensor, compared to six feet for the original Kinect, and can track up to 6 skeletons at once. It can also detect a player's heart rate, facial expression, the position and orientation of 25 individual joints (including thumbs), the weight put on each limb, speed of player movements, and track gestures performed with a standard controller. The color camera captures 1080p video that can be displayed in the same resolution as the viewing screen, allowing for a broad range of scenarios. In addition to improving video communications and video analytics applications, this provides a stable input on which to build interactive applications. Kinect's microphone is used to provide voice commands for actions such as navigation, starting games, and waking the console from sleep mode. The recommended player's height is at least 40 inches, which roughly corresponds to children of 4 and a half years old and up.
All Xbox One consoles were initially shipped with Kinect included. In June 2014, bundles without Kinect were made available, along with an updated Xbox One SDK allowing game developers to explicitly disable Kinect skeletal tracking, freeing up system resources that were previously reserved for Kinect even if it was disabled or unplugged. As interest in Kinect waned in 2014, later revisions of the Xbox One hardware, including the Xbox One S and Xbox One X, dropped the dedicated Kinect port, requiring users to purchase a USB 3.0 and AC adapter to use the Kinect for Xbox One.
Considered a market failure compared to the Kinect for Xbox 360, the Kinect for Xbox One product was discontinued by October 25, 2017. Production of the adapter cord also ended by January 2018.
Kinect 2 for Windows (2014)
Released on 15 July 2014, Kinect 2 for Windows is based on the Kinect for Xbox One and considered a replacement of the original Kinect for Windows. It was also repackaged as "Kinect for Windows v2". It is nearly identical besides the removal of Xbox branding, and included a USB 3.0/AC adapter. It released alongside version 2.0 of the Windows SDK for the platform. The MSRP was US$199. Microsoft considers the Kinect 2 for Windows equivalent in performance to the Xbox One version.
In April 2015 having difficulty in keeping up manufacturing demand for the Kinect for Xbox One this edition was discontinued. Microsoft directed commercial users to use the Xbox One version with a USB adapter instead.
Azure Kinect (2019)
On May 7, 2018, Microsoft announced a new iteration of Kinect technology designed primarily for enterprise software and artificial intelligence usage. It is designed around the Microsoft Azure cloud platform, and is meant to "leverage the richness of Azure AI to dramatically improve insights and operations". It has a smaller form factor than the Xbox iterations of Kinect, and features a 12-megapixel camera, a time-of-flight depth sensor also used on the HoloLens 2, and seven microphones. A development kit was announced in February 2019.
Kinect-enabled features on the Xbox operating system
Requiring at least 190 MB of available storage space, Kinect system software allows users to operate Xbox 360 Dashboard console user interface through voice commands and hand gestures. Techniques such as voice recognition and facial recognition are employed to automatically identify users. Among the applications for Kinect is Video Kinect, which enables voice chat or video chat with other Xbox 360 users or users of Windows Live Messenger. The application can use Kinect's tracking functionality and Kinect sensor's motorized pivot to keep users in frame even as they move around. Other applications with Kinect support include ESPN, Zune Marketplace, Netflix, Hulu Plus and Last.fm. Microsoft later confirmed that all forthcoming applications would be required to have Kinect functionality for certification.
The Xbox One originally shipped in bundles with the Kinect; the original Xbox One user interface software had similar support for Kinect features as the Xbox 360 software, such as voice commands, user identification via skeletal or vocal recognition, and gesture-driven commands, though these features could be fully disabled due to privacy concerns. However, this had left the more traditional navigation using a controller haphazard. In May 2014, when Microsoft announced it would be releasing Xbox One systems without a Kinect, the company also announced plans to alter the Xbox One system software to remove Kinect features. Kinect support in the software was fully removed by November 2015.
Xbox 360 games that require Kinect are packaged in special purple cases (as opposed to the green cases used by all other Xbox 360 games), and contain a prominent "Requires Kinect Sensor" logo on their front cover. Games that include features utilizing Kinect, but do not require it for standard gameplay, contain a "Better with Kinect Sensor" branding on their front covers.
Kinect launched on November 4, 2010 with 17 titles. Third-party publishers of available and announced Kinect games include, among others, Ubisoft, Electronic Arts, LucasArts, THQ, Activision, Konami, Sega, Capcom, Namco Bandai and MTV Games. Along with retail games, there are also select Xbox Live Arcade titles which require the peripheral.
Kinect Fun Labs
At E3 2011, Microsoft announced Kinect Fun Labs: a collection of various gadgets and minigames that are accessible from Xbox 360 Dashboard. These gadgets includes Build A Buddy, Air Band, Kinect Googly Eyes, Kinect Me, Bobblehead, Kinect Sparkler, Junk Fu and Avatar Kinect.
Numerous developers are researching possible applications of Kinect that go beyond the system's intended purpose of playing games, further enabled by the release of the Kinect SDK by Microsoft.
Alexandre Alahi from EPFL presented a video surveillance system that combines multiple Kinect devices to track groups of people even in complete darkness. Companies So touch and Evoluce have developed presentation software for Kinect that can be controlled by hand gestures; among its features is a multi-touch zoom mode. In December 2010, the free public beta of HTPC software KinEmote was launched; it allows navigation of Boxee and XBMC menus using a Kinect sensor. Soroush Falahati wrote an application that can be used to create stereoscopic 3D images with a Kinect sensor.
Kinect also shows compelling potential for use in medicine. Researchers at the University of Minnesota have used Kinect to measure a range of disorder symptoms in children, creating new ways of objective evaluation to detect such conditions as autism, attention-deficit disorder and obsessive-compulsive disorder. Several groups have reported using Kinect for intraoperative, review of medical imaging, allowing the surgeon to access the information without contamination. This technique is already in use at Sunnybrook Health Sciences Centre in Toronto, where doctors use it to guide imaging during cancer surgery. At least one company, GestSure Technologies, is pursuing the commercialization of such a system.
NASA's Jet Propulsion Laboratory (JPL) signed up for the Kinect for Windows Developer program in November 2013 to use the new Kinect to manipulate a robotic arm in combination with an Oculus Rift virtual reality headset, creating "the most immersive interface" the unit had built to date.
Kinect for Xbox 360
Upon its release, the Kinect garnered generally positive opinions from reviewers and critics. IGN gave the device 7.5 out of 10, saying that "Kinect can be a tremendous amount of fun for casual players, and the creative, controller-free concept is undeniably appealing", though adding that for "$149.99, a motion-tracking camera add-on for Xbox 360 is a tough sell, especially considering that the entry level variation of Xbox 360 itself is only $199.99". Game Informer rated Kinect 8 out of 10, praising the technology but noting that the experience takes a while to get used to and that the spatial requirement may pose a barrier. Computer and Video Games called the device a technological gem and applauded the gesture and voice controls, while criticizing the launch lineup and Kinect Hub.
CNET's review pointed out how Kinect keeps players active with its full-body motion sensing but criticized the learning curve, the additional power supply needed for older Xbox 360 consoles and the space requirements. Engadget, too, listed the large space requirements as a negative, along with Kinect's launch lineup and the slowness of the hand gesture UI. The review praised the system's powerful technology and the potential of its yoga and dance games. Kotaku considered the device revolutionary upon first use but noted that games were sometimes unable to recognize gestures or had slow responses, concluding that Kinect is "not must-own yet, more like must-eventually own." TechRadar praised the voice control and saw a great deal of potential in the device whose lag and space requirements were identified as issues. Gizmodo also noted Kinect's potential and expressed curiosity in how more mainstream titles would utilize the technology. Ars Technica's review expressed concern that the core feature of Kinect, its lack of a controller, would hamper development of games beyond those that have either stationary players or control the player's movement automatically.
The mainstream press also reviewed Kinect. USA Today compared it to the futuristic control scheme seen in Minority Report, stating that "playing games feels great" and giving the device 3.5 out of 4 stars. David Pogue from The New York Times predicted players will feel a "crazy, magical, omigosh rush the first time you try the Kinect." Despite calling the motion tracking less precise than Wii's implementation, Pogue concluded that "Kinect’s astonishing technology creates a completely new activity that’s social, age-spanning and even athletic." The Globe and Mail titled Kinect as setting a "new standard for motion control." The slight input lag between making a physical movement and Kinect registering it was not considered a major issue with most games, and the review called Kinect "a good and innovative product," rating it 3.5 out of 4 stars.
Kinect for Xbox One
Although featuring improved performance over the original Kinect, its successor has been subject to mixed responses. In its Xbox One review, Engadget praised Xbox One's Kinect functionality, such as face recognition login and improved motion tracking, but that whilst "magical", "every false positive or unrecognized [voice] command had us reaching for the controller." The Kinect's inability to understand some accents in English was criticized. Writing for Time, Matt Peckham described the device as being "chunky" in appearance, but that the facial recognition login feature was "creepy but equally sci-fi-future cool", and that the new voice recognition system was a "powerful, addictive way to navigate the console, and save for a few exceptions that seem to be smoothing out with use". However, its accuracy was found to be affected by background noise, and Peckham further noted that launching games using voice recognition required that the full title of the game be given rather than an abbreviated name that the console "ought to semantically understand", such as Forza Motorsport 5 rather than "Forza 5".
While announcing Kinect's discontinuation in an interview with Fast Co. Design on October 25, 2017, Microsoft stated that 35 million units had been sold since its release. 24 million units of Kinect had been shipped by February 2013. Having sold 8 million units in its first 60 days on the market, Kinect claimed the Guinness World Record of being the "fastest selling consumer electronics device". According to Wedbush analyst Michael Pachter, Kinect bundles accounted for about half of all Xbox 360 console sales in December 2010 and for more than two-thirds in February 2011. More than 750,000 Kinect units were sold during the week of Black Friday 2011.
Other motion controllers
Kinect competes with several motion controllers on other home consoles, such as Wii Remote, Wii Remote Plus and Wii Balance Board for the Wii and Wii U, PlayStation Move and PlayStation Eye for the PlayStation 3, and PlayStation Camera for the PlayStation 4.
- The machine learning work on human motion capture within Kinect won the 2011 MacRobert Award for engineering innovation.
- Kinect Won T3's "Gadget of the Year" award for 2011. It also won the "Gaming Gadget of the Year" prize.
- 'Microsoft Kinect for Windows Software Development Kit' was ranked second in "The 10 Most Innovative Tech Products of 2011" at Popular Mechanics Breakthrough Awards ceremony in New York City.
- Microsoft Kinect for Windows won Innovation of the Year in the 2012 Seattle 2.0 Startup Awards.
- "Kinect gets UK release date". BBC. August 17, 2010. Retrieved August 17, 2010.
It will hit the shelves on 10 November, five days after the US.
- "Microsoft Xbox 360 Kinect Launches November 4". Gizmodo.
- "Ya llegaron a Colombia los videojuegos que no necesitan controles" [They've arrived in Colombia: controller-free video games] (in Spanish). Caracol TV. November 14, 2010. Archived from the original on July 27, 2011. Retrieved November 14, 2010.
- "Xbox 360′s Kinect given release date for Australia". September 1, 2010. Archived from the original on September 3, 2010. Retrieved September 3, 2010.
- "Microsoft to launch Kinect in Japan in November". The Economic Times. September 8, 2010. Retrieved October 20, 2010.
- "Starting February 1, 2012: Use the Power of Kinect for Windows to Change the World - Kinect for Windows Blog - Site Home - MSDN Blogs". Blogs.msdn.com. January 9, 2012. Retrieved March 12, 2012.
- "Microsoft isn't selling Kinect for Windows anymore". Engadget.
- "Achievement Unlocked: 10 Years – Thank You, Xbox 360". Xbox Wire. April 20, 2016.
- Yin-Poole, Wesley (October 25, 2017). "Kinect officially dead". Eurogamer. Retrieved October 25, 2017.
- Reisinger, Don (October 25, 2017). "Microsoft Has Finally Killed the Kinect Xbox Sensor". Fortune. Retrieved December 1, 2017.
- Microsoft (2012). "Kinect for Windows SDK 1.6 Programming Guide". Microsoft. Retrieved February 16, 2013.
- Hester, Blake (January 14, 2020). "All the money in the world couldn't make Kinect happen". Polygon. Retrieved January 16, 2020.
- Tolito, Stephan (June 1, 2009). "Why Xbox 360 New Controller Is Called 'Natal'". Kotaku. Retrieved January 17, 2020.
- "E3 2010: Project Natal is "Kinect"". IGN. June 13, 2010. Retrieved March 18, 2011.
- "E3 2009: Microsoft Press Conference Live Blog". IGN. June 1, 2009. Retrieved June 1, 2009.
- Dunham, Jeremy (June 2, 2009). "E3 2009: I've Played Natal and it Works". IGN. Retrieved March 18, 2011.
- Totilo, Stephen (June 5, 2009). "Microsoft: Project Natal Can Support Multiple Players, See Fingers". Kotaku. Gawker Media. Retrieved June 6, 2009.
- Takahashi, Dean (June 2, 2009). "Microsoft games exec details how Project Natal was born". VentureBeat. Retrieved June 6, 2009.
The companies are doing a lot of great work with the cameras. But the magic is in the software. It’s a combination of partners and our own software.
- Dudley, Brier (June 3, 2009). "E3: New info on Microsoft's Natal -- how it works, multiplayer and PC versions". Brier Dudley's Blog. The Seattle Times. Retrieved June 3, 2009.
We actually built a software platform that was what we wanted to have as content creators. And then [asked], 'OK, are there hardware solutions out there that plug in?' But the amount of software and the quality of software are really the innovation in Natal.
- Gibson, Ellie (June 5, 2009). "E3: Post-Natal Discussion". Eurogamer. Eurogamer Network. pp. 1–2. Retrieved June 9, 2009.
Essentially we do a 3D body scan of you. We graph 48 joints in your body and then those 48 joints are tracked in real-time, at 30 frames per second. So several for your head, shoulders, elbows, hands, feet...
- Wilson, Mark; Buchanan, Matt (June 3, 2009). "Testing Project Natal: We Touched the Intangible". Gizmodo. Gawker Media. Retrieved June 6, 2009.
- Takahashi, Dean (June 2, 2009). "Microsoft games exec details how Kinect was born". VentureBeat. Retrieved June 6, 2009.
The companies are doing a lot of great work with the cameras. But the magic is in the software. It’s a combination of partners and our own software.
- French, Michael (November 11, 2009). "Natal launch details leak from secret Microsoft tour". MCV. Intent Media. Retrieved November 11, 2009.
November 2010 release, 5m units global ship, 14 games, and super-low sub-£50 price [...] Microsoft is planning to manufacture 5m units for day one release, with a mix of console and camera plus solus SKUs expected. [...] The device should cost under £100,00 when sold solo. The somewhat confirmed price is stated to be at 150$ (USD)when sold alone this is 50$ higher than the original 99$ projected price. [...] Another even says the camera could even retail for just £30.
- Channell, Mike (October 3, 2009). "Mark Rein Interview". Xbox 360: The Official Xbox Magazine. Future Publishing. Retrieved October 11, 2009.
And you know, I think they said they were going to ship Natal with every Xbox when they actually launch the thing, so everybody will have one.
- Brightman, James (August 21, 2009). "Xbox 360 Slim? Analysts Weigh In". IndustryGamers. pp. 1–2. Archived from the original on December 24, 2009. Retrieved September 2, 2009.
- Kennedy, Sam (June 12, 2009). "Rumor: Xbox Natal is Actually Microsoft's Next Console". 1UP.com. UGO Entertainment. Retrieved June 19, 2009.[permanent dead link]
- Graft, Kris; Sheffield, Brandon (June 16, 2009). "Microsoft's Future Begins Now: Shane Kim Speaks". Gamasutra. Think Services. p. 3. Retrieved June 20, 2009.
- "Generation When?". Edge Online. Future plc. June 18, 2009. p. 2. Archived from the original on January 5, 2011. Retrieved June 22, 2009.
Since the NES, every five years or so a distinct new wave of technology has washed across the industry, bringing with it new power and functions to a market galvanised by the promise of faster, better, more.
- Crecente, Brian (September 25, 2009). "Playing Space Invaders, Katamari Damacy on Natal". Kotaku. Gawker Media. Retrieved September 26, 2009.
- Chester, Nick (September 25, 2009). "TGS 09: Patching older 360 games to work with natal not possible". Destructoid. Retrieved September 26, 2009.
- Elliott, Phil (January 7, 2010). "Microsoft drops internal Natal chip". GamesIndustry.biz. Retrieved March 18, 2011.
- Barras, Colin (January 7, 2010). "Microsoft's body-sensing, button-busting controller". New Scientist. Archived from the original on January 14, 2012. Retrieved March 18, 2011.
- Plunkett, Luke (June 13, 2010). "Project Natal Officially Renamed "Kinect", More Games Revealed". Kotaku. Retrieved January 17, 2020.
- Bramwell, Tom (June 14, 2010). "MS man: Kinect "perfect name" for Natal". Eurogamer. Retrieved January 17, 2020.
- Snider, Mike (June 16, 2010). "Microsoft Kinect gets into motion as E3 confab kicks off". USA Today. Retrieved June 15, 2010.
- Chen, Brian X. (June 14, 2010). "Microsoft Releases New, Slimmer Xbox 360". Wired. Retrieved January 17, 2020.
- Stuart, Keith (June 18, 2010). "E3 2010: hands off with Kinect". The Guardian. Retrieved January 17, 2020.
- Pearson, Dan (November 3, 2010). "Kipman: Kinect CPU use down to single-digits | News". Gamesindustry.biz. Retrieved November 4, 2010.
- Atkinson, Claire (October 17, 2010). "Microsoft gears up for big launch of Kinect controller-free device for Xbox - NYPOST.com". New York Post. Retrieved October 20, 2010.
- Makuch, Eddie (October 18, 2010). "Microsoft to spend $500M on Kinect marketing - Report". Retrieved February 24, 2018.
- "Half A Billion Dollar Marketing Budget For Microsoft Kinect Launch". October 19, 2010. Retrieved February 24, 2018.
- Dutton, Fred (October 18, 2010). "Kinect gets $500m marketing spend". Retrieved February 24, 2018.
- "Kinect Ads: 'You Are the Controller'". Microsoft. October 21, 2010. Archived from the original on March 6, 2011. Retrieved January 25, 2011.
- "Oprah Audience Explodes Into Hysterics Over Free Xbox Kinects". Gizmodo. Retrieved October 20, 2010.
- Mitchell, Richard (November 5, 2010). "Jimmy Fallon gives everyone in his audience a Kinect". Joystiq. Retrieved December 9, 2010.
- "Ashley Tisdale Hosts The Xbox Kinect Event". Bsckids.com. October 26, 2010. Archived from the original on October 31, 2010. Retrieved November 4, 2010.
- Goldman, Tom (November 2, 2010). "Greasy Fingers Don't Matter With Kinect". The Escapist. Retrieved January 25, 2011.
- Greenhough, Chris (November 4, 2010). "Time Square grinds to a halt for Microsoft Kinect". Inquisitr.com. Retrieved January 25, 2011.
- Lian, Jotham. "Kinect launches Nov 18 with StarHub tie-up". ChannelNewsAsia.com.
- "New Zealand Kinect Launch Date confirmed!". September 17, 2010. Archived from the original on December 10, 2010. Retrieved September 17, 2010.
- "Xbox Kinect Japanese launch date". September 14, 2010. Archived from the original on September 19, 2010. Retrieved September 17, 2010.
- Boyd, Graeme (July 20, 2010). "Kinect bundled with slim 4GB Xbox 360 Arcade for $300, new console for $200 in August". Twitter. Archived from the original on July 20, 2010. Retrieved July 20, 2010.
Euro prices are 149.99 Euro for the camera + Kinect Adventures, 299.99 Euro for the 4GB console bundle.
- "New Xbox 360, Kinect Sensor and "Kinect Adventures" — Get All Your Controller-Free Entertainment in One Complete Package". Redmond, Washington: Microsoft. July 20, 2010. Archived from the original on July 22, 2010. Retrieved July 20, 2010.
- "Say Hello to the New Xbox 360". Microsoft. Archived from the original on February 24, 2011. Retrieved March 18, 2011.
- Purchese, Robert (September 8, 2010). "£300 Kinect 250GB bundle confirmed". Eurogamer. Retrieved September 8, 2010.
- "Xbox Live's Major Nelson » Limited Edition Star Wars Console". Microsoft. July 21, 2011. Retrieved July 22, 2011.
- Crecente, Brian (June 5, 2013). "Privacy concerns threaten to overshadow Microsoft's new console". Polygon. Vox Media. Retrieved June 10, 2013.
- Sottek, T.C. (May 27, 2013). "Microsoft may award achievements for watching TV and ads by monitoring you with Kinect". The Verge. Vox Media. Retrieved June 10, 2013.
- McWhertor, Michael (June 6, 2013). "Kinect on Xbox One will not record or upload your conversations, Microsoft says". Polygon. Vox Media. Retrieved June 10, 2013.
- Greenwald, Will (May 22, 2013). "Hello Xbox One, Goodbye Freedom". PC Magazine. Ziff Davis. Retrieved May 23, 2013.
- Schreier, Jason (August 12, 2013). "Kinect No Longer Mandatory For Xbox One (But Will Still Come With It) [UPDATE]". Kotaku. Univision Communications. Retrieved August 23, 2013.
- Anthony, Sebastian (August 13, 2013). "Xbox One no longer requires Kinect, but it'll still come in the box, and you'll still pay $500". ExtremeTech. Ziff Davis. Retrieved September 5, 2013.
- Sarkar, Samit (June 13, 2016). "Xbox One S console has no Kinect port, requires USB adapter". Polygon. Retrieved January 17, 2020.
- Gartenberg, Chaim (January 2, 2018). "Microsoft has discontinued the Kinect Adapter for newer Xbox One consoles". The Verge. Retrieved January 17, 2020.
- Plante, Chris (June 17, 2015). "Kinect isn't dead: Microsoft has unannounced Kinect games in development". The Verge. Retrieved January 17, 2020.
- Webster, Andrew (July 13, 2016). "Kinect is almost dead, but it finally has a killer app". The Verge. Retrieved January 17, 2020.
- Tanz, Jason (June 28, 2011). "Kinect Hackers Are Changing the Future of Robotics". Wired. 19 (7). Retrieved January 17, 2020.
- Pöhlmann, Stefanie; Harkness, Elaine; Taylor, Christopher; Astley, Susan (December 9, 2016). "Evaluation of Kinect 3D Sensor for Healthcare Imaging". Journal of Medical and Biological Engineering. 36 (6): 857–870. doi:10.1007/s40846-016-0184-2. PMC 5216096. PMID 28111534.
- Peckham, Matt (November 12, 2010). "Kinect Hack Makes Microsoft Angry, Deny its Existence". PC World. Retrieved January 17, 2020.
- Carmody, Tom (November 4, 2010). "Adafruit Offers $1000 Bounty for Open-Source Kinect Drivers". Wired. Archived from the original on July 30, 2014.
- "Adafruit Contest Winner Announcement". November 10, 2010. Retrieved November 11, 2010.
- "Me gusta trastear" [I like to tinker]. El País (in Spanish). November 11, 2010. Retrieved November 15, 2010.
- "OpenKinect's libfreenect". January 16, 2020. Retrieved November 15, 2010.
- "Open Source Kinect contest has been won". hackaday.com. November 11, 2010. Retrieved November 11, 2010.
- Terdiman, Daniel (February 21, 2011). "Kinect developer claims credit for hack bounty idea". cNET.com. Retrieved February 23, 2011.
- Carmody, Tim (January 11, 2012). "Microsoft bets big on Kinect for Windows, but splits its community". Ars Technica. Retrieved January 17, 2020.
- Carmody, Tim (November 22, 2011). "How Microsoft Learned to Stop Worrying and Love Open Kinect". Wired. Retrieved January 17, 2020.
- "Microsoft: Kinect wasn't hacked, USB port left open 'by design'". techflash.com. November 20, 2010. Retrieved November 29, 2010.
- Orland, Kyle (December 10, 2010). "Kinect 3D Tech Company PrimeSense Releases Open Source PC/Mac Drivers". Gamasutra. Retrieved January 17, 2020.
- Mitchell, Richard (December 10, 2010). "PrimeSense releases open source drivers, middleware for Kinect". Joystiq. Retrieved December 11, 2010.
- "PrimeSense Teams Up with ASUS to Bring Intuitive PC Entertainment to the Living Room with WAVI Xtion". Business Wire. January 3, 2011. Retrieved January 3, 2011.
- Matthews, Lee (September 7, 2011). "Asus Wavi Xtion motion controller goes on sale in China next month". geek.com. Retrieved February 26, 2015.
- Thorson, Tor (February 22, 2011). "PC Kinect SDK due this spring". GameSpot. Retrieved January 17, 2020.
- Isaac, Mike (June 17, 2011). "Microsoft Releases Xbox Kinect SDK, Hackers Get to Work". Wired. Retrieved January 17, 2020.
- Orland, Kyle (April 13, 2011). "Kinect PC SDK To Include Full Skeleton Tracking, Directional Microphone Support". Gamasutra. Retrieved January 17, 2020.
- "Microsoft's Commercial Kinect Partners, Panasonic's Record $5.5 Billion Loss, Anonymous Threatens To Expose Mexican Cartel". Fast Company. October 31, 2011. Retrieved March 12, 2012.
- Greene, Jay (February 1, 2012). "Microsoft debuts Kinect for Windows, commercial SDK | Microsoft - CNET News". News.cnet.com. Retrieved June 15, 2013.
- Silbert, Sarah (May 23, 2013). "Microsoft: next-gen Kinect sensor for Windows to launch in 2014". Engadget. Retrieved January 17, 2020.
- Machkovech, Sam (June 3, 2014). "Kinect v2 comes to the PC on July 15 for $199". Ars Technica. Retrieved January 17, 2020.
- Dent, Steve (December 31, 2014). "Wave goodbye to Microsoft's original Kinect for Windows". Engadget. Retrieved January 17, 2019.
- Protalinski, Emil (April 2, 2015). "Microsoft stops producing Kinect for Windows v2 sensor, will focus on Kinect for Xbox One and Windows apps". Venture Beat. Retrieved January 17, 2020.
- Cranz, Alex (May 10, 2018). "Microsoft Kinect Refuses to Die". Gizmodo. Retrieved January 17, 2020.
- Mcbride, Sarah (May 23, 2016). "With HoloLens, Microsoft aims to avoid Google's mistakes". Reuters. Retrieved May 23, 2016.
- Liao, Shannon (May 7, 2018). "Microsoft is moving Kinect to the cloud". The Verge. Retrieved January 17, 2020.
- Ranger, Steve (February 27, 2019). "What is Microsoft's Azure Kinect DK?". ZDNet. Retrieved January 17, 2020.
- Sarbolandi, Hamed; Lefloch, Damien; Kolb, Andreas (May 21, 2015). "Kinect Range Sensing: Structured-Light versus Time-of-Flight Kinect". Computer Vision and Image Understanding. 139: 1–20. arXiv:1505.05459. Bibcode:2015arXiv150505459S. doi:10.1016/j.cviu.2015.05.006.
- Forbes, Ron; Dayal, Arjun (December 29, 2010). "How You Become the Controller". Microsoft. Archived from the original on January 11, 2011.
- ""MIT" The 50 most innovative companies 2011, MIT technological review". Retrieved February 24, 2018.
- Takahashi, Dean (September 5, 2009), "How many vendors does it take to make Microsoft's Project Natal game control system?", Venture Beat, retrieved January 8, 2010
- Press, MS (March 31, 2010). "PrimeSense Supplies 3-D-Sensing Technology to Project Natal for Xbox 360". MsPress. p. MsPress. Archived from the original on June 20, 2010. Retrieved March 31, 2010.
- "© 2010 PrimeSense Ltd. | FAQ". Primesense.com. Archived from the original on March 6, 2012. Retrieved March 16, 2011.
- mirror2image (November 30, 2010). "How Kinect depth sensor works – stereo triangulation?". Mirror2image.wordpress.com. Retrieved March 16, 2011.
- "» Kinect Hacking 103: Looking at Kinect IR Patterns". Futurepicture. November 17, 2010. Archived from the original on March 17, 2012. Retrieved March 16, 2011.
- ""Project Natal" 101". Microsoft. June 1, 2009. Archived from the original on January 21, 2012. Retrieved June 2, 2009.
- Totilo, Stephen (January 7, 2010). "Natal Recognizes 31 Body Parts, Uses Tenth of Xbox 360 "Computing Resources"". Kotaku, Gawker Media. Retrieved November 25, 2010.
- "Microsoft: Kinect doesn't listen in mainland Europe till spring". September 1, 2010.
- Bramwell, Tom (June 3, 2009). "E3: MS execs: Natal not derived from 3DV". Eurogamer. Eurogamer Network. Retrieved June 5, 2009.
- Lee, Johnny (June 1, 2009). "Project Natal". Procrastineering. Retrieved June 6, 2009.
- "Play.com (UK) : Kinect : Xbox 360 - Free Delivery". Play.com. Retrieved July 2, 2010.
This information is based on specifications supplied by manufacturers and should be used for guidance only.
- "Kinect: The company behind the tech explains how it works". Joystiq. June 19, 2010. Retrieved March 21, 2011.
- "OpenKinect Protocol Documentation".
- "Kinect for Xbox 360". Microsoft Store. Microsoft. Archived from the original on June 18, 2010. Retrieved July 7, 2010.
Array of 4 microphones supporting single speaker voice recognition
- "Project Natal & Its Instruction Manual(!) In The Wild". Kotaku. April 20, 2010. Retrieved May 27, 2010.
- "Original Xbox 360 requires separate power connection for Kinect". Joystiq. June 14, 2010. Retrieved June 14, 2010.
- "Starting February 1, 2012: Use the Power of Kinect for Windows to Change the World". Retrieved February 24, 2018.
- "About the Kinect for Windows SDK - Microsoft Research". Retrieved October 19, 2011.
- "Can Kinect Make Windows Cool Again?". Businessweek. March 8, 2012. Retrieved March 12, 2012.
- Albanesius, Chloe (March 27, 2012). "Kinect for Windows 1.5 Coming in May". PC Magazine.
- Albanesius, Chloe (May 21, 2012). "Kinect for Windows 1.5 Released With Facial, Skeletal Tracking". PC Magazine.
- Tom Warren (March 27, 2012). "Kinect for Windows 1.5 will feature '10-joint' skeletal tracking and four new speech recognition languages". The Verge. Retrieved June 15, 2013.
- Gorman, Michael (March 27, 2012). "Kinect for Windows version 1.5 to be released in May". Engadget.com. Retrieved June 15, 2013.
- "What's Ahead: A Sneak Peek - Kinect for Windows Product Blog - Site Home - MSDN Blogs". Blogs.msdn.com. March 26, 2012. Retrieved June 15, 2013.
- "Kinect for Windows releases SDK update and launches in China". Retrieved February 24, 2018.
- "The latest Kinect for Windows SDK is here". Retrieved February 24, 2018.
- "Updated SDK, with HTML5, Kinect Fusion improvements, and more". Retrieved February 24, 2018.
- "Microsoft's new Kinect is official: larger field of view, HD camera, wake with voice". Retrieved February 24, 2018.
- Dave Tach (May 21, 2013). "Kinect is always listening on Xbox One, but privacy is a 'top priority' for Microsoft". Polygon. Retrieved May 22, 2013.
- "The Kid-Friendly Guide to Kinect". Channel 9. Retrieved November 13, 2018.
- "Kinect and your kids: What works, what won't". msnbc.com. November 10, 2010. Retrieved November 13, 2018.
- Crecente, Brian (May 9, 2014). "Microsoft: Dropping Kinect could free up extra processing power in Xbox One". Polygon. Retrieved May 9, 2014.
- Thurrott, Paul. "Explaining the Performance Improvements in the June Xbox One XDK Update". Supersite for Windows. Penton. Retrieved July 1, 2014.
- "Microsoft ends free Kinect adapter promotion for Xbox One S owners". Polygon. Vox Media. April 5, 2017. Retrieved April 5, 2017.
- Sarkar, Samit (January 2, 2018). "Microsoft discontinues Xbox One Kinect adapter". Polygon. Retrieved January 2, 2018.
- "Standalone Xbox One Kinect Launching October 7 for $150 With Dance Central". GameSpot. Retrieved December 16, 2014.
- "The Kinect for Windows v2 sensor and free SDK 2.0 public preview are here". Microsoft. July 15, 2014. Retrieved March 12, 2018.
- "Microsoft has a Kinect for Windows v2 sensor". Eurogamer.net. Retrieved May 8, 2018.
- "Microsoft has a Kinect for Windows v2 sensor". Eurogamer.net. Retrieved May 8, 2018.
- "Microsoft stops producing Kinect for Windows v2 sensor, will focus on Kinect for Xbox One and Windows apps". VentureBeat. April 2, 2015. Retrieved May 8, 2018.
- "Kinect gets another shot at Microsoft Build". CNET. May 7, 2018. Retrieved May 8, 2018.
- "Microsoft is moving Kinect to the cloud". The Verge. Retrieved May 8, 2018.
- Warren, Tom (February 24, 2019). "Microsoft shrinks Kinect into a $399 cloud-powered PC peripheral". The Verge. Retrieved February 24, 2019.
- Warren, Tom (February 25, 2019). "A closer look at Microsoft's new Kinect sensor". The Verge. Retrieved February 26, 2019.
- "Xbox.com: Kinect". Xbox.com. Microsoft. Archived from the original on September 12, 2010. Retrieved September 18, 2010.
- "Netflix and Hulu Plus with Kinect coming this spring to Xbox 360". Engadget. January 5, 2011. Retrieved October 19, 2011.
- Robinson, Blake (November 4, 2010). "Last.fm Gesture Controls for Xbox Kinect". Mashable.com. Retrieved October 19, 2011.
- Narcisse, Evan (December 8, 2011). "Wave Hello: Microsoft's Requiring Kinect Functionality for All Future Apps Built for Xbox 360". Kotaku.com. Retrieved March 12, 2012.
- Orland, Kyle (November 8, 2013). "Hands-on with the Xbox One: Kinect, interface, and OS impressions". Ars Technica. Retrieved January 17, 2020.
- Gilbert, Ben (May 13, 2014). "The Xbox One price drop isn't just to boost sales, says Microsoft". Engadget. Retrieved January 17, 2020.
- Maiberg, Emanual (November 10, 2015). "Another Nail in Kinect's Coffin: Xbox One Update Removes Gesture Tracking". Vice. Retrieved January 17, 2020.
- Dixon, Gwynne (July 6, 2010). "Some Games Are "Better With Kinect", Others "Require" It News". TotalVideoGames. Archived from the original on July 9, 2010. Retrieved July 2, 2010.
- Van Camp, Jeffrey (October 19, 2010). "Microsoft reveals Kinect launch games". digitaltrends.com. Retrieved December 9, 2010.
- "Free Kinect Videogame Junk Fu Now Available". Electronic Theatre. February 20, 2012. Retrieved March 12, 2012.
- Nosowitz, Dan. "Microsoft Gives the Kinect an App Store and Voice-Controlled Live TV | Popular Science". Popsci.com. Retrieved October 19, 2011.
- "Kinect Fun Labs - Xbox.com". Marketplace.xbox.com. June 6, 2011. Retrieved October 19, 2011.
- Terrones, Terry (August 29, 2011). "Kinect Fun Labs Review from". GamePro. Archived from the original on December 1, 2011. Retrieved October 19, 2011.
- Zhang, Zhengyou (April 27, 2012). "Microsoft Kinect Sensor and Its Effect". IEEE MultiMedia. 19 (2): 4–10. doi:10.1109/MMUL.2012.24.
- Wortham, Jenna (November 21, 2010). "With Kinect Controller, Hackers Take Liberties". The New York Times. Retrieved November 25, 2010.
- Doug (December 30, 2019). "depthJS". GitHub.
- Savov, Vlad (December 9, 2010). "Kinect finally fulfills its Minority Report destiny (video)". Engadget. Retrieved December 9, 2010.
- "Kinect and MRPT | The Mobile Robot Programming Toolkit". Mrpt.org. Retrieved March 16, 2011.
- Newton, James (December 6, 2010). "Become Tom Hanks in Big with Kinect's Giant Piano Hack". KINECTaku.com. Retrieved December 6, 2010.
- Newton, Casey (January 10, 2011). "Microsoft's Xbox Kinect beyond hackers, hobbyists". San Francisco Chronicle.
- Bonvin, Didier (January 17, 2020). "Connecting Kinects for Group Surveillance". Retrieved December 26, 2010.
- "Control your PowerPoint and PDF presentations with Kinect". PRLog.org. December 2, 2010. Retrieved December 8, 2010.
- Protalinski, Emil (December 24, 2010). "KinEmote brings Kinect to Boxee and XBMC on Windows". TechSpot. Retrieved December 26, 2010.
- "Kinect 3D Photo Capture Tool 0.7 Released". Retrieved March 4, 2011.
- "Minnesota University Team Adapts Kinect for Medical Use". Softpedia. March 15, 2011. Retrieved May 23, 2011.
- "Medical practice finds use for Kinect hack". QuickJump Gaming Network. December 27, 2010. Retrieved May 23, 2011.
- "radRounds". Xbox Kinect-based radiology & medical image exploration. Retrieved December 4, 2011.
- "Doctors use Xbox Kinect in cancer surgery". CHealth. March 22, 2011. Retrieved May 23, 2011.
- "GestSure Technologies". Retrieved December 4, 2011.
- Lee, Nicole. "NASA's JPL maneuvers a robot arm with Oculus Rift and Kinect 2, points to more immersive space missions". Web. Retrieved March 19, 2014.
- Ingham, Tim (November 4, 2010). "Kinect Review". Computer and Video Games. Archived from the original on November 6, 2010. Retrieved November 4, 2010.
- Gonzalez, Annette (November 4, 2010). "Kinect Hardware Review: Wave Of The Future". Game Informer. Retrieved November 4, 2010.
- Lowe, Scott (November 4, 2010). "Microsoft Kinect Review". IGN. Retrieved November 4, 2010.
- Bakalar, Jeff (November 4, 2010). "Xbox 360 Kinect Review". CNET. Retrieved November 4, 2010.
- Miller, Ross (November 4, 2010). "Kinect for Xbox 360 review". Engadget. AOL. Retrieved November 4, 2010.
- Molina, Brett (November 4, 2010). "We play Kinect..." USA Today. Retrieved November 4, 2010.
- "Microsoft Kinect review". TechRadar. November 4, 2010. Retrieved November 8, 2010.
- Harris, Ron (November 4, 2010). "Microsoft Kinect review". The Washington Post. Retrieved November 10, 2010.
- Wilson, Jeffrey L. (November 4, 2010). "Microsoft Kinect for Xbox 360". PCMag.com. Retrieved November 10, 2010.
- "Microsoft Kinect Review: The beginning of hassle-free gaming | Game Guru". Gameguru.in. February 4, 2011. Retrieved March 16, 2011.
- "Microsoft Kinect for Xbox 360 Review: Controller-free gaming at its best". TechShout. February 5, 2011. Retrieved March 16, 2011.
- Totilo, Stephen (November 3, 2010). "Review: Kinect". Kotaku. Gawker Media. Retrieved November 3, 2010.
- Chen, Jason (November 4, 2010). "Xbox Kinect Review: It's a Brand New Console". Gizmodo. Retrieved November 4, 2010.
- "Buy a house, clean your floor, move your butt: Ars reviews Kinect". Ars Technica. November 4, 2010.
- Pogue, David (November 4, 2010). "Kinect Pushes Users Into a Sweaty New Dimension". The New York Times. Retrieved November 4, 2010.
- Sapieha, Chad (November 4, 2010). "Microsoft's Kinect sets new standard for motion control". The Globe and Mail. Toronto. Retrieved November 4, 2010.
- Gilbert, Ben. "Xbox One review: a fast and powerful work in progress". Engadget. Retrieved December 16, 2014.
- "The Point : Can Kinect Understand Weird Accents?".
- Peckham, Matt. "Xbox One Review: Microsoft's Ambitious One-Stop Shop". Time. Retrieved April 5, 2015.
- Epstein, Zach (February 12, 2013). "MICROSOFT SAYS XBOX 360 SALES HAVE SURPASSED 76 MILLION UNITS, KINECT SALES TOP 24 MILLION". BGR.com. Retrieved February 15, 2013.
- Alexander, Leigh (March 9, 2011). "Microsoft: Kinect Hits 10 Million Units, 10 Million Games". Gamasutra. Retrieved March 10, 2011.
- Ingham, Tim (March 9, 2011). "Kinect cruises past 10m sales barrier". CVG. Archived from the original on March 11, 2011. Retrieved March 10, 2011.
- "Kinect Confirmed As Fastest-Selling Consumer Electronics Device". Guinnessworldrecords.com. Archived from the original on March 11, 2011. Retrieved March 10, 2011.
- Stevens, Tim (March 9, 2011). "Microsoft sells 10 million Kinects, 10 million Kinect games". Engadget. Retrieved March 10, 2011.
- Brightman, James (January 14, 2011). "Microsoft's Xbox 360 Kinect Bundles Outsold Move Bundles By 5:1". Industrygamers.com. Archived from the original on January 16, 2011. Retrieved January 14, 2011.
- Brightman, James (March 11, 2011). "Kinect Bundles Outsold PS3 Move Bundles 5:1 in February". Industrygamers.com. Archived from the original on March 14, 2011. Retrieved March 11, 2011.
- "Xbox 360 records the biggest week in Xbox history". MajorNelson.com. November 29, 2011. Retrieved November 29, 2011.
- "Xbox 360 sees biggest sales week in its 7-year history". VentureBeat. November 29, 2011. Retrieved March 12, 2012.
- "Kinect team scoop the $50,000 Macrobert Award". Professional Engineering. June 7, 2011.
- "Gadget of the Year | T3 Gadget Awards 2011". T3. Future plc. Retrieved October 13, 2011.
- "Gaming Gadget of the Year | T3 Gadget Awards 2011". T3. Future plc. Retrieved October 13, 2011.
- "The 10 Most Innovative Tech Products of 2011". Popular Mechanics. Retrieved March 12, 2012.
- "Kinect for Windows SDK Beta Makes It Big in the Big Apple". Microsoft Research Connections Blog. Blogs.MSDN.com. October 13, 2011. Retrieved March 12, 2012.
- "Revealed: The winners of the Seattle 2.0 Startup Awards". May 4, 2012. Retrieved February 24, 2018.
|Wikimedia Commons has media related to Kinect.|
- Official website for Xbox + Kinect
- Official website for Kinect for Windows
- Kinect Playlist at the official YouTube Xbox channel
- KinectShare KinectShare.com
- iFixit teardown of Kinect
- Patent application relating to Kinect
- Kinect for Windows SDK
- Time-of-Flight and Kinect Imaging
- Official KINECT for Windows Blog