Patent ID: 7133552
Filing Date: 2006-11-07
Classification: G06K,G06T,H04N

Abstract:
1. A method for extracting a face from a still image or moving image using color distortion information, the method comprising: extracting color distortion information from a given image; determining a skin color range in a color space using the extracted color distortion information; and extracting a face by extracting a skin color region using the determined skin color range, wherein the color distortion information is hue information, and wherein extractintg the color distortion information comprises: dividing an image into N*M partial regions: obtaining an average hue value of pixels having a chroma above a predetermined threshold, and a variance of hue values for the pixels concerned in the average hue value with respect to all the divided regions; re-averaging average hue values obtained in the respective regions with respect to regions satisfying a condition that the variance is below a predetermined threshold, and obtaining a variance of the average hue values concerned in the re-averaging; and designating the re-averaged average hue value as the hue value of the color distortion information.