8K resolution is the largest ultra high definition television (UHDTV) resolution to exist in digital television and digital cinematography. 8K refers to the horizontal resolution of these formats, which are all on the order of 8,000 pixels, forming the total image dimensions (7680x4320). 8K is a display resolution that may eventually be the successor to 4K resolution. 4K is speculated to become a mainstream standard in televisions by 2017.
One advantage of high-resolution displays such as 8K, is to have each pixel be indistinguishable from another to the human eye, at a certain distance away. On an 8K screen sized 52”, this effect would be achieved in a distance of 20” from the screen, and on a 92” screen at 3’ away. Another practical purpose of this resolution is in combination with a cropping technique used in film editing. This allows filmmakers to film in a high resolution such as 8K, with a wide lens, or at a farther distance from a potentially dangerous subject, intending to zoom and crop digitally in post-production, a portion of the original image to match a smaller resolution such as the current industry standard for High-definition televisions (1080p, 720p & 480p).
Few film cameras have the capability to film in 8K, with innovators NHK being one of the only companies to have created a small broadcasting camera with an 8K Image sensor. Sony and Red Digital Cinema Camera Company are both working to bring larger 8K sensors in more of their cameras in the coming years. Although 8K will not be a mainstream resolution anytime soon, a major reason filmmakers are pushing for 8K cameras is to get better 4K footage. Through a process called downsampling, using a larger 8K image downsampled to 4K could create a sharper picture with richer colors than a 4K camera would be able to achieve on its own with a smaller sensor.
On April 6, 2013, Astro Design announced the AH-4800, capable of recording 8K resolution.
An 8K scan/4K intermediate digital restoration of Lawrence of Arabia was made for Blu-ray and theatrical re-release during 2012 by Sony Pictures to celebrate the film's 50th anniversary. According to Grover Crisp, executive VP of restoration at Sony Pictures, the new 8K scan has such high resolution that when examined, showed a series of fine concentric lines in a pattern "reminiscent of a fingerprint" near the top of the frame. This was caused by the film emulsion melting and cracking in the desert heat during production. Sony had to hire a third party to minimise or eliminate the rippling artefacts in the new restored version.
On May 17, 2013, the Franklin Institute premiered To Space And Back, an 8K×8K, 60 fps, 3D video running approximately 25 minutes. During its first run at the Fels Planetarium it was played at 4K, 60 fps.
Japanese public broadcaster NHK began research and development on 8K in 1995, having spent over $1B dollars on the resolution since then. Codenamed Super Hi-Vision, NHK also was simultaneously working on the development of 22.2 channel surround sound audio, aiming for mainstream broadcasting by the year 2032. Experimental transmissions of the resolution were tested with the London 2012 Olympic Games, and at the Cannes Film Festival showcasing Beauties À La Carte, a 27 minute shortfilm showcased publicly on a 220” screen. The world's first 8K television was unveiled by Sharp at the Consumer Electronics Show (CES) in 2013.
|10080 × 4320||(21:9)||(43.5) megapixels|
|8192 × 4320||~(17:9)||(35.4) megapixels|
|7680 × 4320||(16:9)||(33.2) megapixels|
|8192 × 5120||(16:10)||(41.9) megapixels|
|8192 × 8192||(1:1)||(67.1) megapixels|
8K UHD is a resolution of 7680 × 4320 (33.2 megapixels) and is one of the two resolutions of ultra high definition television, the other being 4K UHD. In 2013, a transmission network's capability to carry HDTV resolution was limited by internet speeds and relied on satellite broadcast to transmit the high data rates. The demand is expected to drive the adoption of video compression standards and to place significant pressure on physical communication networks in the near future.
8K UHD has four times the horizontal and vertical resolution of the 1080p HDTV format, with sixteen times as many pixels overall.
8K fulldome is a resolution of 8192×8192 (67.1 megapixels) and is the resolution of top-end modern projection for hemispherical fulldome theatres often seen in planetariums. 8K fulldome projects over 4 times the width and over 7 1⁄2 times the height resolution of 1080p HDTV format, with thirty-two times as many pixels overall.
- Sharp's 8K TV, 7680 × 4320 resolution - International Consumer Electronics Show (CES) 2013
- AH-4800, a camera capable of recording in 8k resolution. Unveiled by Astro Design on April 6, 2013.
- Definiti 8K theaters, 8192×8192 resolution (apu)
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