Tracking moving object using KLT

Question

Breezy Boo 2017-4-14

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/335345-tracking-moving-object-using-klt

回答： Mohamed Ata 2018-4-27

Following is code to track corner points using klt algorithm.

I detect corner points using harris corner detector which also include some background points but i want to track only moving objects in the video and place box around them. Can i use blob and gaussian mixture model?

 videoFileReader = vision.VideoFileReader('CrowdVideo.avi'));
 videoPlayer = vision.VideoPlayer('Position',[100,100,680,520]);
 release(videoFileReader);
 release(videoPlayer);
 objectFrame = step(videoFileReader);
 %Detect interest points in the object region
%for rgb image
points = detectHarrisFeatures(rgb2gray(objectFrame));
 %Display the detected points
pointImage = insertMarker(objectFrame, points.Location, '+', 'Color', 'white');
figure;
imshow(pointImage);
title('Detected Interest points');
 %Creater tracker object
tracker = vision.PointTracker('MaxBidirectionalError',1);
 %Initialize tracker
initialize(tracker, points.Location, objectFrame);
 %read, track, display point and results in each frame
while ~isDone(videoFileReader)
    frame = step(videoFileReader);
    [points, validity] = step(tracker, frame);
    out = insertMarker(frame, points(validity,:),'+');
    step(videoPlayer, out);
end
 release(videoPlayer);
release(videoFileReader);
  end