Automatic human face location in a complex background using motion and color information

摘要

Automatic human face location in a complex background is one of the difficult problems in developing a fully automatic face recognition system and is still a relatively unexplored problem. In this paper, we propose an effective automatic face location system that can locate the face region in a complex background when the system is used as a pre-processor of a practical face recognition system for security. We use two natural visual cues, the motion and the color, to locate face regions in a real scene. In the first stage of the proposed system, we extract a velocity vector field of the face, and by thresholding this velocity field to detect the region showing a clear motion, the face region is separated from the background. In the next stage, the method based on the thresholding in hue space and knowledge-based location process is used to find the eye, eyebrow, and mouth regions of the face. According to our experiment, the proposed system shows fast and robust location results.