I have some code that detects objects in a video (the video is of a lava lamp). I would like to measure the velocity of the bubbles using the centroid.

I'm assuming i will need to work out how far they move per frame but I'm struggling to work out how to do this as i am a beginner. Is it also possible to have a more accurate velocity by using say 10 frames? Any help is appreciated. Thanks

Answer 1

[Image Analyst]

Yes, you can measure the velocity in units of pixels per second. See my image segmentation demo: http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862 as well as my attached demo for reading frames from a video.