Abstract: In this article,a new arithmetic is proposed to detect the human face.It includes three parts: skin processing,finding the skin area based on the line-connection and finding the feature of the area.The new arithmetic can get the geometrical property of the skin areas quickly and effectively,so the humanface can be located by the features of the face.Lots of experiments show that the arithmetic is fast,and it is easy to carry out.Further more,it can locate the face effectively andadvoid the disad...