基于色彩直方图匹配的颜色传递算法研究

Research of Color Transfer Algorithm Based on Histogram Matching

针对点匹配算法可能出现误传的情况,提出一种基于色彩直方图匹配的颜色传递算法,先将源图像和目标图像由RGB空间转换到CIELab空间,对源图像和目标图像各个通道构造色彩直方图,然后对各通道色彩直方图进行形状分析,通过色彩直方图匹配,即修改源图的色彩直方图形状,使之与目标图像色彩直方图的形状相匹配,从而达到控制源图颜色并实现色彩传递的目的。实验结果表明,该算法能较好地传递图像色彩,且在某些情况下,比传统的全局匹配算法和点匹配算法具有更好的传递效果;同时该算法也适用于其他风格属性图像的色彩传递。

In view of the situation that it may appear the erroneous transfer of objects in the point matching-based color transfer method, a color transfer algorithm based on color histogram matching is proposed. The algorithm transforms the color space of source and target images from RGB to CIELab with better irrelevancies at each channel , constructs the color histograms for all channels and analyzes their shapes ,alters the histogram shape of source image by histogram matching to complete color transferring to make the source image match the target ＇s, and finally transforms matched pixels back to RGB space .Experimental results show that the algorithm has better con-trol effect for color transfer.In addition, it has better effect than the global matching-based algorithm and the point matching-based algo-rithm, and it is applicable to other style images ＇ transferring.