HSV色彩空间中的肤色特征及其新的识别参量

Features of Human Skin in HSV Color Space and New Recognition Parameter

研究了色调(H)饱和度(S)亮度(V)色彩空间的各分量随光照变化的规律。实验发现:当光照强度发生变化或待测表面的曲度发生变化时,(S+V)/2能够保持相对稳定;当皮肤的色调发生变化时,(S+V)/2随之改变,但与H的变化方向相反。研究结果表明,可以将(S+V)/H作为一个新的识别参量,不仅对光照度和照射角度有较好的鲁棒性,而且增强了HSV空间对人类皮肤的分辨能力。

In HSV color space H is selected as the basic recognition parameter because it has a narrow range for skin color and can keep stable when the illumination intensity or the curvature of skin surface has been changed. The rules of HSV color space with the change of illumination intensity are studied in this paper. It is firstly found that （S＋V）/2 can keep steady when the illumination intensity is changed or the skin surface is inflected, and （S＋V）/2 changes with the skin color, but the tendency is contrary to the change of H. Therefore,（S＋V）/H can be used as a new recognition parameter which can enhance HSV ability to recognize human skin.