黑白图像彩色化是计算机视觉领域中一个很有意义的问题,给灰度图像加上颜色可以增加图像的视觉效果,例如对旧黑白照片、老电影以及科学图例等进行彩色化处理。图像彩色化可以定义为对一张输入的黑白图像，根据其灰度分布，再加上人工的颜色指定或者自动的颜色匹配从而得到其彩色图的问题。Welsh提出了一种将灰度图像彩色化的算法，该算法使用一个像素的邻域的统计值来指导匹配过程，但运算速度较慢。-The color of black and white images is a very significant problems in the field of computer vision, to the grayscale image with color images can add visual effects and color processing, such as old black and white photos, old movies, as well as scientific legend. Image Colorization can be defined as black and white image of an input, according to its gray-scale distribution, coupled with artificial colors specified or automatic color matching to the color map. Welsh proposed a grayscale image colorization algorithm, which is the statistical value of a pixel neighborhood to guide the matching process, but the slower speed of operation.