User talk:Simpsons contributor

2018-07-16T09:48:10Z

Visualspatialmemory: /* edge detection in the retina */

#[[/Out of date|Archive 1]]
#[[/Out of date 2|Archive 2]]

== Mandelbrot_sequence_new.gif sourcecode ==

hi, I'm not sure but you are the author of http://en.wikipedia.org/wiki/File:Mandelbrot_sequence_new.gif ?
If yes, is the sourcecode you used available somewhere? the link that is given there (http://www.nitorijournal.org/?p=1066) seems broken.
If not, would you know who would have the sourcecode? — Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[User:Patteone|Patteone]] ([[User talk:Patteone|talk]] • [[Special:Contributions/Patteone|contribs]]) 10:18, 28 September 2011 (UTC) 

== edge detection in the retina ==
Hi. Would you be able to share your retina receptive field on/off cell code with me? I thought it was a very good implementation, would like to play around with it. Thanks.
[[User:Visualspatialmemory|Visualspatialmemory]] ([[User talk:Visualspatialmemory|talk]]) 09:47, 16 July 2018 (UTC)

Hey.I was wondering if i could check out your code for the center-surround image. Im trying to create a similar thing in python as a realtime implementation. Thanks
--[[User:Tomesparon|Tomesparon]] ([[User talk:Tomesparon|talk]]) 20:51, 20 August 2017 (UTC)

Hi. I'm interested in checking out your code for the center-surround image - would you let me see it? I'm attempting to build a 'biologically inspired' edge detector algorithm. Its this one:
http://en.wikipedia.org/wiki/File:Red_on_centre_green_off_centre_.png
And thanks very much for putting up those nice images.

[[User:Michaelroyames|MRA]] ([[User talk:Michaelroyames|talk]]) 20:36, 24 February 2015 (UTC)

Hello!

http://en.wikipedia.org/wiki/File:Red_on_centre_green_off_centre_.png

I currently work in the visual sciences focusing on the neuro-circuitry in the retina and I am very intrigued by your work :) I am actually trying to implement the same thing but in C I was just wondering if it might be possible to see the code that you used to generate the edge detection images as a 'guide'. I greatly appreciate it and I will like to thank you in advance :)

[[User:Blueoranges|Blueoranges]] ([[User talk:Blueoranges|talk]]) 17:11, 19 November 2011 (UTC)

Addenum: Thank you so much for your help! I really appreciate it. If it won't be too much trouble for you, can you send your version as well? Thank you again! :) I hope you have a great day :D

[[User:Blueoranges|Blueoranges]] ([[User talk:Blueoranges|talk]]) 07:19, 20 November 2011 (UTC)

== File:Dailymillerjpegbirthday.JPG listed for deletion ==
A file that you uploaded or altered, [[:File:Dailymillerjpegbirthday.JPG]], has been listed at [[Wikipedia:Files for deletion]]. Please see the [[Wikipedia:Files for deletion/2012 March 20#File:Dailymillerjpegbirthday.JPG|'''discussion''']] to see why this is (you may have to search for the title of the image to find its entry), if you are interested in it not being deleted. Thank you.  [[User:Cloudbound|Cloudbound]] ([[User talk:Cloudbound|talk]]) 20:13, 20 March 2012 (UTC)

Could you contact me as soon as possible about permission to include your images in a college textbook?
Deborah Anderson
[[User:Nickclay|Nickclay]] ([[User talk:Nickclay|talk]]) 17:33, 6 April 2012 (UTC)

== Julia sets vertically squashed ==

Your blue Julia set images were all vertically squashed by a factor of <math>\frac 34</math>, distorting the nice hierarchies of circular symmetries into ellipses. I’ve fixed them by resizing them from 1024×768 to 768×768, but you may want to fix your code and reupload them at full quality. [[User:Anders Kaseorg|Anders Kaseorg]] ([[User talk:Anders Kaseorg|talk]]) 21:13, 13 June 2012 (UTC)

== Canny edge detector ==

Hi, I would very much like to get a copy of your Canny edge detection code referred to under the images in the [[Canny edge detector]] article for examination for a project I am working on. [http://www.box.net/shared/static/i3bq6n49u1.zip This] link you had posted previously in other replies seems to have expired. Is there any chance you still have it and could upload it again? Much thanks in advance. [[User:Sedgewix|Sedgewix]] ([[User talk:Sedgewix|talk]]) 11:46, 25 February 2013 (UTC)

<blockquote>The code is long lost now, but it shouldn't take too much effort to rewrite it. I'll do that in my spare time in the coming days. I'm not quite sure how long it will take. --[[User:Simpsons contributor|Simpsons contributor]] ([[User talk:Simpsons contributor|talk]]) 16:33, 24 February 2013 (UTC)
* There is another implementation here if you're interested: http://www.tomgibara.com/computer-vision/CannyEdgeDetector.java)</blockquote>

 
Thanks for the link! I have found that one among several others that I will note here for the sake of record keeping:

 
* [http://dasl.mem.drexel.edu/alumni/bGreen/www.pages.drexel.edu/_weg22/can_tut.html Canny Edge Detection Tutorial - Bill Green (2002)] '''(c)''' (code is missing but is present on archive.org: [http://web.archive.org/web/20041017073457/http://www.pages.drexel.edu/~weg22/can_tut.html Canny Edge Detection Tutorial] - note also that the third image on that page is not the result of that code, the second one is, third appears to be a reference.)
* [http://www.pages.drexel.edu/~nk752/Research/cannyTut2.html Canny Tutorial - Noah Kuntz (2006)] '''(c++)''' (another implementation based on Bill's tutorial)
* [http://matlabserver.cs.rug.nl/cannyedgedetectionweb/web/index.html Canny edge detector (Canny filter) for image processing and computer vision - N. Petkov (2012)] '''(matlab)'''
* [http://marathon.csee.usf.edu/edge/edge_detection.html Edge Detector Comparison - Heath, M. (1996)] '''(c)''' (technically a Canny edge detector, but does not use a Sobel differential and sets aside the gradient direction information)
* [http://www.cs.ucf.edu/~mikel/Research/Edge_Detection.htm Canny Edge Detector - Mikel Rodriguez (2005)] '''(matlab)'''
* [https://github.com/Itseez/opencv/blob/master/modules/imgproc/src/canny.cpp OpenCV Source (2013)] '''(c++)'''
* [http://cs.nyu.edu/~cil217/Vision/vision_edge_detector.htm Canny Edge Detector - Chien-I Liao (2004)] '''(c++)'''
* [http://suraj.lums.edu.pk/~cs436a02/CannyImplementation.htm Canny's Edge Detector: Implementation - Sohaib A. Khan (2002)] '''(matlab)'''
* [http://code.google.com/p/fast-edge/ FAST-EDGE - Benjamin C. Haynor (2009)] '''(c)'''
* [http://vision.sista.arizona.edu/nvs/courses/ece532/oxygendoc/html/edge_8c-source.html Edge Detection Program - Nikhil Shirahatti (2003)] '''(c)'''
* [http://www.tomgibara.com/computer-vision/canny-edge-detector Canny Edge Detector Implementation - Tom Gibara (2011)] '''(java)'''
* [http://web.archive.org/web/20060510045843/http://forum.java.sun.com/thread.jspa?threadID=546211&start=45&tstart=0 Java Technology Forums - canny algorithm for edge detection - Leandro Trevisan (2004)] '''(java)''' (Tom Gibara's reference)
* [http://repa.ouroborus.net/#Demo Repa (REgular PArallel arrays) Demo - Ben Lippmeier (2012)] '''(haskell)''' — Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[User:Sedgewix|Sedgewix]] ([[User talk:Sedgewix|talk]] • [[Special:Contributions/Sedgewix|contribs]]) 12:23, 25 February 2013 (UTC) 

 
But the results that you have posted in the [[Canny edge detector]] article are ''far superior'' to the results of any of these. The only one that really compares is N. Petkov's implementation, but it uses a lot of matlab's functions and I am looking for something I can replicate in c.

 
I feel kind of bad to ask you to re-write yours, that seems like free work you had not planned on, but I honestly feel that if your code can produce the posted results, then the world is at a loss for the lack of your code. Are you sure you don't still have it somewhere? Or perhaps one of the other people you sent it to still do? It was only two years ago... ([http://en.wikipedia.org/wiki/User_talk:Maja_bury Maja_bury], [http://en.wikipedia.org/wiki/User_talk:ToMMiTTo ToMMiTTo])

 
So hopefully your old code is still out there somewhere, but if not, only re-write it if you want to, as all I can offer is my gratitude and appreciation. Seriously, based on the posted images your implementation was "head and shoulders" above everyone else.
[[User:Sedgewix|Sedgewix]] ([[User talk:Sedgewix|talk]]) 11:46, 25 February 2013 (UTC)
== File:Copy PSII new design.JPG listed for deletion ==
A file that you uploaded or altered, [[:File:Copy PSII new design.JPG]], has been listed at [[Wikipedia:Files for deletion]]. Please see the [[Wikipedia:Files for deletion/2013 March 8#File:Copy PSII new design.JPG|'''discussion''']] to see why this is (you may have to search for the title of the image to find its entry), if you are interested in it not being deleted. Thank you.  [[User:Kelly|'''Kelly''']] [[User talk:Kelly|hi!]] 04:14, 8 March 2013 (UTC)
== [[:File:Julia -0.835 -0.2321.png]] missing description details ==

<div style="padding:5px; background-color:#E1F1DE;">'''Dear uploader:''' The media file you uploaded as:
*[[:File:Julia -0.835 -0.2321.png]]
is missing a description and/or other details on its image description page. If possible, please add this information. This will help other editors make better use of the image, and it will be more informative to readers.

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If you have any questions, please see [[Help:Image page#Description of the image|Help:Image page]]. Thank you. [[User:Theo's Little Bot|Theo's Little Bot]] ([[User:Theo's Little Bot#Tasks|error?]]) 08:46, 14 April 2013 (UTC) </div>

== File:Chart animation.gif listed for deletion ==
A file that you uploaded or altered, [[:File:Chart animation.gif]], has been listed at [[Wikipedia:Files for deletion]]. Please see the [[Wikipedia:Files for deletion/2014 March 22#File:Chart animation.gif|'''discussion''']] to see why it has been listed (you may have to search for the title of the image to find its entry). Feel free to add your opinion on the matter below the nomination. Thank you.  — [[User:Smjg|Smjg]] ([[User talk:Smjg|talk]]) 16:13, 22 March 2014 (UTC) — [[User:Smjg|Smjg]] ([[User talk:Smjg|talk]]) 16:13, 22 March 2014 (UTC)

== GIF frame delays ==
Please see comments I left for you at [[:commons:User_talk:Simpsons_contributor#GIF frame delays|your Commons User talk page]]. — [[User:Hydrargyrum|Quicksilver]][[User_talk:Hydrargyrum|T]] [[Special:Emailuser/Hydrargyrum|@]] 23:17, 12 September 2014 (UTC)

== Source code for Julia_-0.8_0.156.png ==

Do you still have the source code for Julia_-0.8_0.156.png -- in particular the number of iterations and the colour mapping? Thanks! — Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[User:Aeyaisoo|Aeyaisoo]] ([[User talk:Aeyaisoo|talk]] • [[Special:Contributions/Aeyaisoo|contribs]]) 15:09, 21 June 2015 (UTC) 
== File:Genetic blue.gif listed for discussion ==
[[File:Information.svg|30px|left]] A file that you uploaded or altered, [[:File:Genetic blue.gif]], has been listed at [[Wikipedia:Files for discussion]]. Please see the [[Wikipedia:Files for discussion/2016 November 27#File:Genetic blue.gif|'''discussion''']] to see why it has been listed (you may have to search for the title of the image to find its entry). Feel free to add your opinion on the matter below the nomination. Thank you.  [[User:Jon Kolbert|Jon Kolbert]] ([[User talk:Jon Kolbert|talk]]) 10:29, 27 November 2016 (UTC)
== File:Seasideme.PNG listed for discussion ==
[[File:Information.svg|30px|left]] A file that you uploaded or altered, [[:File:Seasideme.PNG]], has been listed at [[Wikipedia:Files for discussion]]. Please see the [[Wikipedia:Files for discussion/2016 December 2#File:Seasideme.PNG|'''discussion''']] to see why it has been listed (you may have to search for the title of the image to find its entry). Feel free to add your opinion on the matter below the nomination. Thank you.  [[User:Jon Kolbert|Jon Kolbert]] ([[User talk:Jon Kolbert|talk]]) 04:39, 2 December 2016 (UTC)

== POTD notification ==
[[File:Mandelbrot sequence new.gif|thumb|100px|right|[[Wikipedia:Picture of the day/June 2017#June 15 - Thu|POTD]]]]
Hi SC,

Just to let you know, the Featured Picture [[:File:Mandelbrot sequence new.gif]] is scheduled to be Picture of the Day on June 15, 2017. If you get a chance, you can check and improve the caption at [[Template:POTD/2017-06-15]]. Thank you for all of your contributions! — [[User:Crisco 1492|Chris Woodrich]] ([[User talk:Crisco 1492|talk]]) 01:34, 3 June 2017 (UTC)
{{-}}

User:Visualspatialmemory

2018-07-16T09:46:15Z

Visualspatialmemory: ←Created page with 'Starter Page'

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