Pittpatt definitely has the best face-detection algorithm I've seen in any commercial/opensource system. The algorithm they use can be found in these papers: h

Pittpatt definitely has the best face-detection algorithm I've seen in any commercial/opensource system. The algorithm they use can be found in these papers: http://www.cs.cmu.edu/~hws/ http://www.cs.cmu.edu/~hws/ Maybe someday they'll get ported into openCV to replace the current detector which doesn't handle frontal features well.