# User talk:KYN

## Welcome to Wikipedia

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## CV Wikicity

Hi, I noticed you have an interest in Computer Vision. You might also be interested in the new wikicity called computervision.wikicities.com. The aim of this new wiki is to become a encyclopedia of computer and machine vision, and deal with these topics in a far more indepth way than Wikipedia is able. It is intended to host articles, code samples, conference and publication reviews, and perhaps sometimes some original research. The wiki is very new and needs a lot of work. Hope to see you there sometime. Seabhcán 21:42, 2 November 2005 (UTC)

## hey, thanks for linking Instantaneous frequency and Analytic signal

i might have to get in one or the other and change ${\displaystyle \phi \ }$ to ${\displaystyle \theta \ }$ or vise versa, so that there is more consistency. r b-j 05:30, 10 November 2005 (UTC)

## Thanks

Hi, thanks for fixing all my typos in the instantaneous phase article. I will try to remember not to edit late Friday night. KYN 07:34, 12 November 2005 (UTC)

Sure. I've got a browser tool that does the work for me, so it's no big deal.
By the way, if you use ~~~~ to sign your name, it makes your name a clickable link to your user page, like this: — Omegatron 16:58, 12 November 2005 (UTC)

## Computer Vision

Thanks for input..but I don't see exactly how you want me to change the editing I done on Computer Vision...so here is little more explaination for you, may be you can help editing.

Well, it is goverment project to distinguish smoke from tank smoke, dust cloud, and cloud in sky. It uses the image patterns like fractals, huge algorithm (size expansion with axil spinns), edge detection, template noise elimination, etc... it was an example, I think I need your help, I feel like I know what I know but may be I am expressing way that is not correct... can you send me an e-mail steve.kim@comcast.net. Hope to we can come up with better writing, together. thanks.

Stevekimcomcastnet 22:19, 7 February 2006 (UTC)

## reply to computer vision / dendrogram

Just letting you know that i replied to your message on my user page. - BAxelrod 22:19, 14 February 2006 (UTC)

## Regarding Joseph Mundy

I agree, that Joseph Mundy should not get that much attention on the Computer Vision page. I'll move it on an extra page. No need to ask me anyway. I'm used to it, that my stuff gets edited like hell. That's what the Wikipedia is all about. Wedesoft 22:55, 8 March 2006 (BST)

## Category naming conventions and stub types

Just wanted to point you to Wikipedia:Naming conventions#Do not use an article name that suggests a hierarchy of articles, which suggests not using forward slashes in article and category names. There's also Wikipedia:Naming conventions (categories) for other useful information.

Also, if you want to create a new stub category you should probably do it by proposing at Wikipedia:WikiProject Stub sorting/Proposals (different in that it's actually a subpage of the main stub sorting page). There's also information on how to integrate your stub category into Wikipedia, by using stub templates and so on.

Unint 01:15, 28 March 2006 (UTC)

## Category renaming

You wrote: The categories which you tagged for renaming have been renamed in accordance to your suggestions and the old categories can be deleted. Don't know how to do this, but maybe you do?

well, yes i do. i also know how and when category renaming's done. it's done after the debate on what the new names should be at WP:CFD - not while the debates still going on - and using "move" rather than simply making new categories. as it is, better names than those i suggested have been proposed and are likely to be chosen for these categories, so renaming them to those ones was a Bad Idea. BL Lacertae - kiss the lizard 23:49, 15 April 2006 (UTC)

## CWT

The papers mentioned in the external links in the complex wavelet transform refer to some uses in computer vision. Supten 08:34, 13 May 2006 (UTC)

I have added a paragraph. You may kindly expand further Supten 10:03, 15 May 2006 (UTC)


## Nyquist

I replied on my user talk page to your question there. Dicklyon 05:13, 31 July 2006 (UTC)

Find more responses there as before. Dicklyon 03:46, 3 August 2006 (UTC)

## Polly (robot)

Hi --

Polly wasn't just an application of computer vision: new algorithms were developed for it. one is described on the page. So I don't get why you changed the category? --Jaibe 06:54, 2 August 2006 (UTC)

Hi -- It's a stub, it doesn't talk about much of anything yet. But the algorithms that Polly used for vision were pretty significant. I wouldn't say Polly really applied vision since in fact all the things it used were pretty novel. --Jaibe 21:32, 2 August 2006 (UTC)
Hi -- I think listing it as a computer vision stub would be a good solution, but that's not in the list of stubs on wikipedia. could you tell me how to do that? Also, please sign your comments, it saves me going to history to find your talk page :-) --Jaibe 02:12, 13 August 2006 (UTC)
those stubs editing people are crazy!! I just barely prevented them deleting the AI stubs a month ago & then they still renamed it! I'll see if I can get it fixed... (though what it takes is creating a bunch of vision stubs which I can't really do.) Have a look at or comment on this: [1]

--Jaibe 03:21, 14 August 2006 (UTC)

## Inst freq

In [[signal processing, the concept of frequency often plays an important role. However, the basic defintion of frequency implies that the signal is a sinusodial:

${\displaystyle s(t)=A\cos(\omega t)}$

where ${\displaystyle \omega }$ is the frequency of this signal. For a signal which is not of this type, frequency can still be discussed but now there are different ways to do that. The most common approach is to consider the signal's Fourier transform

${\displaystyle F(\omega )=\int _{-\infty }^{\infty }f(t)e^{-i\omega t}dt}$

which implies that the signal ${\displaystyle f}$ is decomposed into components, all being sinusodial and each with their own frequency. For example, the signal

${\displaystyle s(t)=A_{1}\cos(\omega t)+A_{2}\cos(2\omega t)}$

consists of two components with frequencies ${\displaystyle \omega }$ and ${\displaystyle 2\omega }$, respectively.

Another approach to define frequency is to consider the instantaneus frequency of the signal. Although the defintion of this concept is somewhat technical, the idea is simple. A sinusodial signal has a phase which is the angle on which the cosine or sine is taken. For a sinusodial function, the phase is always a linear function of ${\displaystyle t}$, with a slope given by the frequency. In principle, the phase angle can be computed from the signal itself using the analytic signal, a function of ${\displaystyle t}$ which can be derived from the signal itself. More precisely, the phase is the argument of the complex-valued analytic signal, meaning that phase also is a function of ${\displaystyle t}$. Since the analytic signal is well-defined for most general signals, including non-sinusodial signals, this means that the phase can be computed

## Request for edit summary

It would be nice if you could use more often the edit summary, it helps others understand what you changed. Thanks. :) Oleg Alexandrov (talk) 01:51, 16 June 2007 (UTC)

Thanks for uploading Image:Pinhole.svg. Wikipedia gets thousands of images uploaded every day, and in order to verify that the images can be legally used on Wikipedia, the source and copyright status must be indicated. Images need to have an image tag applied to the image description page indicating the copyright status of the image. This uniform and easy-to-understand method of indicating the license status allows potential re-users of the images to know what they are allowed to do with the images.

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## The Working Man's Barnstar

 The Working Man's Barnstar I'm awarding you this "Working" barnstar for your tireless and endless work on the more laborious or repetitive wikipedia tasks. We need more like you! Wikidudeman (talk) 08:49, 1 August 2007 (UTC)
Thanks, this was a pleasant surprise! --KYN 20:58, 1 August 2007 (UTC)

## DYK

 On August 3, 2007, Did you know? was updated with a fact from the article Pinhole camera model, which you created or substantially expanded. If you know of another interesting fact from a recently created article, then please suggest it on the Did you know? talk page.

Hi there KYN and good to see some physics on the main page! This article was kindly nominated by Bakasuprman. Do feel free to self nom in future, Blnguyen (bananabucket) 06:18, 3 August 2007 (UTC)

## Canny / Canny edge detector move

Hey, I've asked for a CSD G6 on Canny edge detector so we can actually move the Canny article over it properly and preserve the page history. Per WP:MOVE, one should never just copy-and-paste to complete a move -- the page history has to be preserved. I'll take care of the move and then restoring the disambig page. Cheers, Iknowyourider (t c) 13:49, 3 August 2007 (UTC)

(in reply to): Don't worry about it -- once the page has been speedily deleted, which shouldn't take that long, one of us can just use the 'move' button on the Canny page. That will move the history automatically. We can then revert Canny edge detector to the revision with the actual page content, and re-create the disambiguation page over at Canny. Not a big deal. Cheers, Iknowyourider (t c) 13:56, 3 August 2007 (UTC)
(in reply to): Alright, the move has been completed. If you want, take a look at the page histories of Canny and Canny edge detector for a little insight into what I did. Thanks! Iknowyourider (t c) 14:16, 3 August 2007 (UTC)

## Image copyright problem with Image:Cameramodel2.svg

Thank you for uploading Image:Cameramodel2.svg. However, it currently is missing information on its copyright status. Wikipedia takes copyright very seriously. It may be deleted soon, unless we can determine the license and the source of the image. If you know this information, then you can add a copyright tag to the image description page.

If you have any questions, please feel free to ask them at the media copyright questions page. Thanks again for your cooperation. NOTE: once you correct this, please remove the tag from the image's page. STBotI 12:37, 10 August 2007 (UTC)

## Scale space

It would be much better if you want make incremental changes to the article, rather than one huge edit from your sandbox that's very hard to review. Dicklyon 22:26, 1 September 2007 (UTC)

Given the state of the artice, incremental changes doesn't appear (to me) as the best way forward. I will try to make a picture of what I believe to be a reasonable structure of the article, which I'm hoping will get some sort of approval. Anyway, we can use this draft to discuss what incremental changes should be made to the Scale space article. --KYN 22:38, 1 September 2007 (UTC)

## Thanks for SVD cleanup

You very nicely merged two presentations of the same idea in the same section and cut out the cruft. Thanks! JackSchmidt (talk) 22:18, 11 February 2008 (UTC)

Thanks! --KYN (talk) 08:28, 12 February 2008 (UTC)

## VDC computer vision

You are correct; it is not obvious how VDC relates to computer vision. The link will become increasingly relevant in the next few years as advances in 3D imaging hardware and object recognition software allows computer vision to actively provide production feedback on construction projects, provide as-built models, and assist with initial virtual modeling. As application gets closer to commercial use CIFE will likely pick up the topic more directly. As it is now CIFE has directly researched computer vision for over five years. Associated research institutes run by CIFE grads also research computer vision. I am not going to add all this to the article since it is not specifically my topic, but here is an explanation for the link relevance. If you feel comfortable adding to article based on these sources please do, at least replace the computer vision link.

Citations:

Computer vision for object recognition: National Institute of Science and Technology (NIST) - Building and Fire Research Laboratory - Construction Metrology and Automation Group (CMAG) is leading research on object recognition use for construction. A. Lytle "Construction Object Recognition and Tracking" NIST-CMAG 2007. [2]

Computer vision for defect detection: Management of Model-Based Sensor Driven Advanced Infrastructure and Construction Systems [3] C. Gordon, B. Akinci, and J. Garrett Jr. "Formalism for Construction Inspection Planning: Requirements and Process Concept" Journal of Computing in Civil Engineering, ASCE, January/February, 2007, pp 29--38. [4]

Computer vision or jobsite safety: Field Systems and Construction Automation Laboratory (FSCAL) [5] Jochen Teizer, Carlos H. Caldas, and Carl T. Haas "Real-Time Three-Dimensional Occupancy Grid Modeling for the Detection and Tracking of Construction Resources" JOURNAL OF CONSTRUCTION ENGINEERING AND MANAGEMENT © ASCE / NOVEMBER 2007 pp 880 - 888 [6]

Computer vision for production monitoring: This research done at Center for Integrated Facility Management (CIFE) and directly related to computer vision and virtual design construction while other references may have similar but differing terminology for same concept as VDC. [7] Fischer,M. and Akbas,R. Automated Detection and Updating of Construction Activity Progress from Time-Lapse Images . 10-1-2003. [8]

thank you and sorry for the lack of information in the current article Granite07 (talk) 19:58, 22 February 2008 (UTC)

## Pages in category

A long time ago you asked a question about displaying the number of pages in a category. I thought I'd let you know it was finally answered at: Help talk:Category#Number of articles in a category. JackSchmidt (talk) 20:17, 8 July 2008 (UTC)

## Omnidirectional camera

Hi KYN - thanks for your recent work on omnidirectional camera! I have expanded the article and submitted it to WP:DYK, and would really appreciate it if you can take another look and see what needs to be improved. Thanks! -Jiuguang (talk) 23:19, 14 July 2008 (UTC)

Hello. The category "Computer Vision" was already there when I started editing those articles. I don't know of any major application in that area. Superquadrics and superellipsoids are indeed popular in computer graphics; e.g. the simplest model for a CRT screen in POV-Ray is a flattened superquadric. All the best, -- Jorge Stolfi (talk) 14:03, 11 October 2008 (UTC)

## cat. in redirect

I confess I hadn't noticed that the correct category was already at the target article, otherwise I would have used a more clear summary :) At the time I suspected you wanted to edit the article but edited the redirect instead (happens sometimes -- actually, come to think about it, it's more like the other way around, but nevermind). In any case, usually redirects are not to be categorized, as they'd fill up the category unnecessarily, since the original article was already there. I can look for the guideline that says that if you wish. Cheers, Waldir talk 23:18, 8 February 2009 (UTC)

## Editing Computer Vision to include Boustrophedon cell decomposition

I see your point. My initial goal was to help remove the orphan tag on the BCD page as very little makes reference to it. You suggested instead to make a reference to BCD in the 3D reconstruction part of the CV article. I could agree with this. The only thing I can't do is provide an overview of the BCD on the BCD page! I created the page about a year ago when I first heard of the concept in my AI class, but truth be told, I am far from an expert on the particular method... I do feel strongly that in some way, related topics in general should be interlinked. Separating theory and application is wonderful, but it should be possible for a user to read information on one type of page and be able to arrive at the other type, in my opinion. ARF (talk) 14:38, 11 August 2009 (UTC)

## Merge discussion for Pose_(computer_vision)#Pose_Estimation

An article that you have been involved in editing, Pose_(computer_vision)#Pose_Estimation, has been proposed for a merge with another article. If you are interested in the merge discussion, please participate by going here, and adding your comments on the discussion page. Thank you. Stephen LaPorte (talk) 01:38, 3 March 2010 (UTC)

## Comments on the Camera Matrix article page

Hello, I am writing here because I see that you are and active recent editor of the page on Camera matrix. I left a comment on the talk page, and I'd appreciate if you could answer there. Regards. glopk (talk) 17:34, 6 July 2010 (UTC)

## WP:SVG Help

Hello, KYN. You have new messages at WP:SVG Help.
You can remove this notice at any time by removing the {{Talkback}} or {{Tb}} template.

## Structure Tensor

IMHO, your structure tensor article is more accessible and useful than the official one. Do you have any plans of trying to merge yours into the official one?

--Andy (talk) 21:48, 24 June 2011 (UTC)

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