基于相似度的光照鲁棒性肤色检测

Illumination invariant skin color detection based on similarity

为增强基于相似度的肤色检测算法对较亮或较暗肤色点的鲁棒性,提出在算法检测后采用随亮度动态变化的色度阈值对较亮或较暗的非肤色点进行再次判定,并将符合阈值判定的非肤色点重设为肤色点的方法。实验拟合出肤色在较亮或较暗情况下的色度均值函数及标准差函数,给出色度阈值的表示形式。测试结果表明,对于较亮或较暗肤色点,改进算法具有更高的正检率,表现出更强的稳定性。

To enhance the robustness of skin color detection algorithm based on the similarity to lighter or darker skin pixels,the method that using the chroma threshold varying dynamically with the luminance to judge lighter or darker non skin pixels again after the algorithm was performed was proposed.The non skin pixels which met the threshold criteria were reset to skin pixels.The mean function and the standard function of skin chroma in brighter or darker conditions were fitted in experiments and the representation of chroma threshold was given.The test results show that the improved algorithm has higher correct detection rate to lighter or darker skin pixels and the algorithm exhibits greater stability.