Pfinder: Real-Time Tracking of the Human Body

A 1995 computer vision system from the MIT Media Laboratory. Christopher R. Wren, Ali J. Azarbayejani, Trevor Darrell, and Alex P. Pentland. Work 1995, video edited 2007.

Category:

Science & Technology

Tags:

• vision
• research
• interface
• MIT
• medialab

[instinctfmine]

hi what is the technology used to this real time tracking of human body...?

[crwren]

The paper is cited in the description, but briefly: each pixel is considered to belong to a class. Each class is described with a probabilistic model over space and color. The classes themselves are labeled as belonging to the background or foreground according to how they were initialized. Around 0:30 you're seeing the foreground class models: some small fleshy bits (my hands and face), a large light area (my shirt), a slightly blue-grey bit (my jeans) and some darker grey bits (my shoes).

[spidermac]

Great.. it's like the natal 15 years ago!

[markiesmurf]

hi Crwren, I am interested in learning how you used the mean and variance of the Guassian distribution to do this, or at least point me in the direction as to learning the technique.

[hott85]

awesome for 1995 !!

[stevirt]

WOW!! Thats AWSOME!!!