在DSP上市现了灰度均衡，灰度均衡是把图像中像素值在灰度级上重新分配的一个过程，使输入图像转换为在每一个灰度级上都有相同的像素点的输出图像。-In the DSP market is the gray balance, gray balance is to the image pixel gray level values in the re-allocation of a process to convert the input image gray level in each pixel h