Automatic Facial feature Extraction in Model-based Coding

this paper, we propose a scheme, based on the integral-projection algorithm, which adapts a face model to an actual face automatically. First, the image is preprocessed by means of edge detection. From the edge mapped image, we use the feature of the increasing sudden edge density to indicate the rough vertical positions of eyes and mouth. According to the local threshold value in each feature area, all of the control points about the eyes and mouth are found. Finally, we use these control points to adapt the model to an actual fac