OpenCV is my favorite Computer Vision (CV) library. http://opencv.willowgarage.com/wiki/ http://opencv.willowgarage.com/wiki/ Face detection is a special case

OpenCV is my favorite Computer Vision (CV) library. http://opencv.willowgarage.com/wiki/ http://opencv.willowgarage.com/wiki/ Face detection is a special case of Haar-wavelets, which are essiantially recognitions that can be 'trained' by reinforcing with positive and negative images. OpenCV comes with some really well pre-trained Haar-wavelets for recognizing faces. http://opencv.willowgarage.com/wiki/FaceDetection http://opencv.willowgarage.com/wiki/FaceDetection