Extract point from a video

Hello. I would like to follow a point on a video by cliking on it, and getting the coordinate as an output (like getpts would do for a picture.) . Do you have any idea on how I can do that with a video, where each next click would send me to a different frame ? Thank you !

Answer 1

[hmi amid]

I think you should use ginput for this. Use imshow for each frame.

uiopen('video.mp4',1)
for frame=1:size(video,4)
 imshow(video(:,:,:,frame))
 drawnow
 [x(frame),y(frame)]=ginput(1);
end

Amid.

[Imran]

In this case, Each frame appears for clicking but frame gets rectangular box once all frames end, that rectangular box appears on just last frame. Can i show all frames with rectangular box once area of box is clicked?

[Imran]

As i used 4 ginput(1) four 4 positions. Last frame is working well with showing rectangular box but not from start. Rectangular box appears just on last frame.

Answer 2

[Image Analyst]

See my attached video tracking solution, where I track the tip of a green colored Sharpie marker.