Comments on: Real-time background subtraction (Updated) http://blog.joa-ebert.com/2006/10/10/real-time-background-substraction/ Actionscript3, Flash, Java, C#, C++, Algorithms & Imageprocessing Sun, 14 Mar 2010 17:47:14 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: Marcio http://blog.joa-ebert.com/2006/10/10/real-time-background-substraction/comment-page-1/#comment-174812 Marcio Sat, 22 Aug 2009 22:16:35 +0000 http://blog.je2050.de/?p=84#comment-174812 I am workign in a project API called CamCanvas which is Flash Web cam to Canvas via JavaScript. And also trying to remove the background. The grayscale approach seems to be weak. I wanted to find a better approach, maybe also something that does the smooth edges? http://www.taboca.com/p/camcanvas/background-remove/camcanvas.html I am workign in a project API called CamCanvas which is Flash Web cam to Canvas via JavaScript. And also trying to remove the background. The grayscale approach seems to be weak. I wanted to find a better approach, maybe also something that does the smooth edges?

http://www.taboca.com/p/camcanvas/background-remove/camcanvas.html

]]> By: Mike http://blog.joa-ebert.com/2006/10/10/real-time-background-substraction/comment-page-1/#comment-173084 Mike Mon, 20 Jul 2009 20:41:41 +0000 http://blog.je2050.de/?p=84#comment-173084 I'm working on a dynamic background subtraction algorithm that removes the static background from a webcam feed. I'm still using Flash 8 and was wondering if you could shed any light on my problem. I've captured a Bitmap of the static background and now wish to check each pixel of the video feed against that static bitmap. If the pixels are different, those pixels are displayed. Any tips on how to accomplish this without running through a huge loop for every pixel on the screen? I can provide code if needed. Thanks for the great post! I’m working on a dynamic background subtraction algorithm that removes the static background from a webcam feed. I’m still using Flash 8 and was wondering if you could shed any light on my problem. I’ve captured a Bitmap of the static background and now wish to check each pixel of the video feed against that static bitmap. If the pixels are different, those pixels are displayed. Any tips on how to accomplish this without running through a huge loop for every pixel on the screen? I can provide code if needed.

Thanks for the great post!

]]> By: joa http://blog.joa-ebert.com/2006/10/10/real-time-background-substraction/comment-page-1/#comment-159560 joa Wed, 17 Sep 2008 08:32:10 +0000 http://blog.je2050.de/?p=84#comment-159560 Yes, you should apply some morphological filters. Yes, you should apply some morphological filters.

]]> By: David http://blog.joa-ebert.com/2006/10/10/real-time-background-substraction/comment-page-1/#comment-159552 David Wed, 17 Sep 2008 06:29:12 +0000 http://blog.je2050.de/?p=84#comment-159552 Hi Joa, I was wondering if you could offer a tip on the alpha map. I'm currently setting everything in the alphamap array halfway through (from index 127 upwards to 0xFFFFFF) with some decent results, but i think i could do better. Do you have any tips? Thanks, Dave Hi Joa,

I was wondering if you could offer a tip on the alpha map. I’m currently setting everything in the alphamap array halfway through (from index 127 upwards to 0xFFFFFF) with some decent results, but i think i could do better. Do you have any tips?

Thanks,
Dave

]]> By: Naomi http://blog.joa-ebert.com/2006/10/10/real-time-background-substraction/comment-page-1/#comment-157447 Naomi Tue, 19 Aug 2008 16:08:07 +0000 http://blog.je2050.de/?p=84#comment-157447 Hi, I would love to see your full source code for this, I have been working on a similar project, but having trouble. Did you extend the MovieClip class or the sprite class? If you could send me your code, that would be amazing. Thanks, Naomi Hi,
I would love to see your full source code for this, I have been working on a similar project, but having trouble. Did you extend the MovieClip class or the sprite class?
If you could send me your code, that would be amazing.
Thanks,
Naomi

]]> By: jdoklovic http://blog.joa-ebert.com/2006/10/10/real-time-background-substraction/comment-page-1/#comment-55057 jdoklovic Mon, 13 Aug 2007 18:01:16 +0000 http://blog.je2050.de/?p=84#comment-55057 Would it be possible to get an example of this using loaded jpg data rather than the webcam? I'm having difficulties making it work properly with just and image, and the example posted above is somewhat incomplete (values for alphaMap, etc) Thanks. Would it be possible to get an example of this using loaded jpg data rather than the webcam?

I’m having difficulties making it work properly with just and image, and the example posted above is somewhat incomplete (values for alphaMap, etc)

Thanks.

]]> By: hierro http://blog.joa-ebert.com/2006/10/10/real-time-background-substraction/comment-page-1/#comment-54418 hierro Fri, 16 Mar 2007 13:49:18 +0000 http://blog.je2050.de/?p=84#comment-54418 More specific, i was thinking about use motion detection to extract a contour of subject and use it as bezier equation (...) to apply phisycs on it...what do u think about it ? More specific, i was thinking about use motion detection to extract a contour of subject and use it as bezier equation (…) to apply phisycs on it…what do u think about it ?

]]> By: hierro http://blog.joa-ebert.com/2006/10/10/real-time-background-substraction/comment-page-1/#comment-54414 hierro Fri, 16 Mar 2007 01:27:55 +0000 http://blog.je2050.de/?p=84#comment-54414 Hello guys, nice work...both of u :) As i already introduced to joa i'm working on the project on the link, now i'm goin to move some features in flex, hope it will be nice...let m eknow what do u think about kilyka :) Hello guys, nice work…both of u :)

As i already introduced to joa i’m working on the project on the link, now i’m goin to move some features in flex, hope it will be nice…let m eknow what do u think about kilyka :)

]]> By: joa http://blog.joa-ebert.com/2006/10/10/real-time-background-substraction/comment-page-1/#comment-8934 joa Mon, 16 Oct 2006 09:49:55 +0000 http://blog.je2050.de/?p=84#comment-8934 I will have a try on that. It would be some sort of masking since I have to copy every pixel from the original webcam image onto the screen if the difference is higher than a threshold value. It could work with an alpha channel. Cutting out the alpha using BitmapData.threshold and then one simple draw(). I will have a try on that. It would be some sort of masking since I have to copy every pixel from the original webcam image onto the screen if the difference is higher than a threshold value. It could work with an alpha channel. Cutting out the alpha using BitmapData.threshold and then one simple draw().

]]> By: Andre Michelle http://blog.joa-ebert.com/2006/10/10/real-time-background-substraction/comment-page-1/#comment-8933 Andre Michelle Mon, 16 Oct 2006 09:34:17 +0000 http://blog.je2050.de/?p=84#comment-8933 You can avoid the copy pixels-loop with the BitmapData.threshold method. Or isn't it faster ? You can avoid the copy pixels-loop with the BitmapData.threshold method. Or isn’t it faster ?

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