Tuesday, September 11, 2012

Automatic video tracking

Screen shot of the automatic analysis of marker motion at 85 C target temperature.
Automatic video tracking is a  technique of automatically locating a  moving object over time within recorded video frames. The image in this post is from a project, where I programmed a tracking algorithm in MATLAB to analyze the shrinkage dynamics of liver tissue during ablative temperature exposures. The algorithm located the tracking markers automatically based on a threshold criteria and identified them on every thirtieth frame (= 1 second). The marker positions (centers) as well as the distance between the two markers were stored and the relative shrinkage in percent was estimated. A video that shows the automatic tracking procedure can be found here: http://www.youtube.com/watch?v=X_SnEULgH7M
The essential tracking function for Maltab can be found here: https://www.dropbox.com/sh/ip306uavm7jpekg/ib65VT633K/Automatic%20video%20tracking
To create the application I used:


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