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POWhat is optimal way of background removing with javaCV?
 

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  1. POWhat is optimal way of background removing with javaCV?
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    <p>I'm looking for the most optimal way of extracting single color on background and replace it with some picture on the fly in JavaCV. I wrote very simple method reading pixel by pixel and replacing it if the color is green for example. This is very slow and even if I divided it into few threads it works dramatically slow. This must be done on live so I have to find out some other method. Perhaps I will have to add some watermark as well after background replacing, so the application must be quite fast.</p> <p>Does anybody can help me finding right way of doing it ? I spend all day long trying to find other way of doing it, but.. all examples I have found doesn't work or maybe I do not know how to adopt them to my needs.</p> <p>This guy (<a href="http://www.youtube.com/watch?v=WOEuE3D88b0" rel="nofollow">http://www.youtube.com/watch?v=WOEuE3D88b0</a>) wrote that he is reading pixel by pixel - no way, or maybe he had very fast multi-core workstation. On my MacBook Pro 2.5 i5 it just doesn't work :(</p> <p>I have used your example and I think that I have mixed it totally. I can see mask of moving me ( white on black background) and if I use CvCopy I can see background appearing at the places where white dots are. Unfortunatelly his is not requested result, but I think I must be very close to it ;) I have to leave me and replace all static objects. Could you please examine my code ?</p> <p><code> private static final IplImage back = cvLoadImage("/Users/user/app/eclipse/JavaCV/resources/1.png", CV_LOAD_IMAGE_COLOR);</p> <pre><code>private static BackgroundSubtractorMOG2 bgs = new BackgroundSubtractorMOG2(30,16,false); public static IplImage replacePixels2(IplImage img){ IplImage frame = cvCloneImage(img); //bgs.getBackgroundImage(frame); IplImage image = IplImage.create(frame.width(), frame.height(), IPL_DEPTH_8U,1); bgs.apply(frame, image, -1); IplROI roi = new IplROI(); roi.xOffset(0); roi.yOffset(0); roi.width(frame.width()); roi.height(frame.height()); IplImage backImageWithRoi = frame.roi(roi); cvCopy(back, backImageWithRoi, image ); return backImageWithRoi; } </code></pre> <p></code></p> <p>I also tried grabCut but this is extremely slow and can't be used in changing stream on live :(</p> <p>Best Regards Jan</p>
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