how can live tracking be done using blobAnalysis by applying color thresholds after changing few properties of the video acquisition ? kindly correct my code where ever u think its senseless or wrong..thank u
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JENNIFER JACOB
le 14 Nov 2016
Commenté : Image Analyst
le 23 Nov 2016
vid = videoinput('winvideo', 1, 'YUY2_640x360');
src = getselectedsource(vid);
vid.FramesPerTrigger = 15;
src.Brightness = 65;
src.Contrast = 3;
src.Exposure = -7;
vid.ReturnedColorspace = 'rgb';
src.FocusMode = 'manual';
src.FrameRate = '15.0000';
hblob = vision.BlobAnalysis('AreaOutputPort', false,'CentroidOutputPort', true, 'BoundingBoxOutputPort', true','MinimumBlobArea',10);
videoPlayer = vision.VideoPlayer('Name', 'bot motion');
nframe=0;
while (nframe <1000)
frame =getsnapshot(vid);
red=frame(:,:,1);
green=frame(:,:,2);
blue=frame(:,:,3);
f=red>=0.5607 & red<=0.9333 & green>=0.2078 & green<=0.7098 & blue>=0.2509 & blue<=0.8215;
diff= medfilt2(f,[3 3]);
g=bwlabel(diff,4);
[Centroid, bbox] = step(hblob,diff);
Centroid = uint16(Centroid);
result = insertShape(frame, 'Rectangle', bbox, 'Color', 'green');
for object = 1:1:length(bbox(:,1))
X = Centroid(object,1);
Y =Centroid(object,2);
X
Y
end
step(videoPlayer, result);
nframe=nframe+1;
end
release(videoPlayer);
release(vid);
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Image Analyst
le 16 Nov 2016
Here's a recent paper on tracking moving objects in live video: http://electronicimaging.spiedigitallibrary.org/article.aspx?articleid=2583607
3 commentaires
Image Analyst
le 18 Nov 2016
See my attached demo where I track the green on a Sharpie marker. It might help you.
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JENNIFER JACOB
le 23 Nov 2016
1 commentaire
Image Analyst
le 23 Nov 2016
It's very simple and well known, and probably faster than other methods that may perhaps be better but slower and more complicated.
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