人脸彩色图像光照校正方法研究

Research on Illumination Correction Method of Face Color Image

对人脸彩色图像的高光和阴影部分进行研究。对于高光区域,利用人脸肤色与像素空间分布特征进行检测,根据在rgb空间中各分量颜色偏移率实现高光区域自动校正,通过边缘拟合方法校正超出显示范围的图像。对于阴影区域,采用Retinex方法进行光照增强。实验结果表明,该方法处理速度快,且能提高图像对比度。

This paper researches the part of high-light and shadow of face skin color image. The high-light region is detected based on human face color and pixel spatial distribution characteristics. According to offset rate of each component in the rgb color space high-light field is corrected. The image in high-light area where pixels over display range is corrected using edge fitting method. For the shaded area Retinex methods is used to enhance intensity. Experimental results show that the method has fast speed and the image contrast improves greatly.