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
el 14 de Nov. de 2016
Comentada: Image Analyst
el 23 de Nov. de 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
el 16 de Nov. de 2016
Here's a recent paper on tracking moving objects in live video: http://electronicimaging.spiedigitallibrary.org/article.aspx?articleid=2583607
3 comentarios
Image Analyst
el 18 de Nov. de 2016
See my attached demo where I track the green on a Sharpie marker. It might help you.
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JENNIFER JACOB
el 23 de Nov. de 2016
1 comentario
Image Analyst
el 23 de Nov. de 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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