New color transformation for lips segmentation

摘要

A robust pre-processing algorithm for lip segmentation ispresented. We define a new transformation based on RGB color space: thechromatic curve map. It aims at increasing discrimination between lipsand skin. It allows robust lips detection under non uniform lightingconditions and without any particular make-up. The motivation of thepresent work is to extract visual information for automatic speechrecognition, videoconferencing and speaker's face synthesis undernatural lighting conditions