1. A method of automatically detecting and tracking a face by an electronic capturing device, comprising: using a face detecting algorithm to detect a face position in a frame based on a skin color model; using a face tracking algorithm to detect a face position in subsequent frames based on a nonparametric technique and a mean shift algorithm; and using said face detecting algorithm again, if said face tracking algorithm cannot detect a face position, to detect a face position of a new frame until a face position is detected in a new frame, and then continuing to use said face tracking algorithm to detect a face position in said subsequent frames.