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
조회 수: 1 (최근 30일)
이전 댓글 표시
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);
댓글 수: 0
채택된 답변
Image Analyst
2016년 11월 16일
Here's a recent paper on tracking moving objects in live video: http://electronicimaging.spiedigitallibrary.org/article.aspx?articleid=2583607
댓글 수: 3
Image Analyst
2016년 11월 18일
See my attached demo where I track the green on a Sharpie marker. It might help you.
추가 답변 (1개)
JENNIFER JACOB
2016년 11월 23일
댓글 수: 1
Image Analyst
2016년 11월 23일
It's very simple and well known, and probably faster than other methods that may perhaps be better but slower and more complicated.
참고 항목
카테고리
Help Center 및 File Exchange에서 Computer Vision Toolbox에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!