Generalized Haar-Like Features for Fast Face Detection

In the framework of Viola-Jones' fast object detection, Haar like features are extracted from gray level image. This paper proposes a new concept of gray-like image from which generalized Haar like features can also be exacted, so as to make use of other forms of images in addition to gray level image in Haar+Adaboost schema. As an application of the gray-like images, the generalized Haar-like features are constructed for fast face detection. Experimental results show that the boosted face detector using the generalized Haar-like features outperforms significantly the original using the basic Haar-like features.