Point tracking on live video

Sep 08, 2005 6 Replies
Y

For an automation experiment I need to track 4 points on video frames.



Imagine a camera looking at a book like rectangular object held by a person. This person will move the book on vertical and horizontal directions. Motion may have some tilt as well. What I want to to do is find tha corners of the object and track and log their positions on each frame.



I would like to do this on a live video (15-25 frames/sec, 640x480 or



1024x768 resolution) of firewire or USB camera attached to a Linux (or Windows) PC. Is there any opensource freeware SW for this ?

Thanks for help.


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Y

THANK YOU.. Spot On!.. Yes, that is almost identical to my application. That is what I'm looking. BUT I'm trying to find a freeware opensource code. Do you know one?

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D

There is a very nice series of articles on robotic vision in SERVO magazine, written by the creator of MAVIS, the vision system used on the LEAF robots.

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D. Jay Newman
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M

I wrote a script in MATLAB that finds the corners of a sheet of paper for a computer vision homework assignment. It relies on the paper having significant contrast with the background, though. I can you send you the source code if you want it. It uses and edge filter and a hough transform.

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D

...

Intel's "Open Source Computer Vision Library"

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One of their detection samples is real-time face tracking.

Later, Daniel

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A

Take a look at openCV. It includes several examples that demonstrate tracking. If your book like object can have a checkerboard pasted on the front then opencv has a function that will probably do exactly what you need.

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