Face segmentation based on Hue-Cr components and morphological technique

This paper proposes a novel algorithm to dynamically define the region of interest (ROI) for videophone applications. The algorithm uses the color information Hue and Cr to find the skin-colored pixels and also uses the range of threshold obtained from red and blue components in normalized RGB color space to remove nonskin-colored pixels because the human skin tends to have a predominance of red and nonpredominance of blue. Post-processing is used to remove such noises by a morphological operator. Moreover, the algorithm performs temporal filtering to remove skin-color pixels that immediately appear from frame to frame by using an object tracking process to perform as memory for collecting skin-color objects obtained from the previous frame to guide the next frame. The experimental results confirm the effectiveness of the proposed algorithm.