Video image quality may be improved by correcting exposure levels and/or enhancing contrast amounts on each frame. One or more of the following phases may be implemented: skin-color model building, face detecting, exposure level correcting, and contrast enhancing. In a described implementation, each...http://www.google.com.hk/patents/US7430333?utm_source=gb-gplus-share專利 US7430333 - Video image quality
