Monday, May 4, 2015

Particle Filters in Computer Vision

I just finished my first semester in the OMS CS program at Georgia Tech! We had projects covering a variety of topics, such as stereo correspondence, matching image features, motion history images, tracking, etc. My favourite amongst these was the implementation of particle filters to track moving objects.

First, we tracked Mitt Romney's face, comparing against a template of his face in the beginning of the video.


Template:

Then, the next part of the assignment was to track his left hand in the same video. This was more challenging, as his hand can change its appearance significantly as it turns and twists during his speech. This involved using a time-varying template to compare his hand against.




Overall, this was a really fun course, and it helped me understand a lot of theory behind the computer vision features I used in ETRobocon 2014!