肤色及非肤色饱和度调整的加权处理方法及其VLSI实现

Weight based method of color saturation adjustment for skin color and non-skin color and its VLSI implementation

饱和度增强的程度受制于其亮度,因而亮度可以作为饱和度自适应的因子。肤色若使用基于亮度的自适应色彩饱和度增强算法,则由于其饱和度增强效果过于明显而显得不自然。所以进一步识别肤色,需要对肤色采取另外的调整算法。为便于VLSI实现,对基于亮度的自适应色彩饱和度增强算法及肤色调整算法进行了改进并加以整合,并采取了权重插值的方法来减弱肤色及非肤色区域分别采用各自的算法进行调整所带来的图像不连续问题。实验证明,采用该算法能取得更好的视觉效果,并易于VLSI实现。

The degree how the saturation can be enhanced depends on its luminance ; luminance can be a factor of its saturation enhancement. It will be over-saturated and it seems not be natural if skin color is also enhanced by luminance-based adaptive color saturation enhaneemcnt algorithm. The method to detect skin color and adjust is needed. In order to implement in VLSI easily, the luminance-based adaptive color saturation enhancement algorithm and skin color reproduction algorithm were improved and integrated. If processing skin color adjustment and non-skin color saturation in its own region separately, the interpolation method based on weight was presented for reducing the effect of image discontinuity. The result of experiment shows that the improved algorithm can improve visual effect and more easily be implemented in VLSI.