图像的灰度直方图显示，二值图像显示的经典代码，还有psnr值计算-Image histogram display, binary image shows the classic code, there psnr value

直方图均衡化的matlab程序，实现了灰度图像的图像增强，在图像预处理方面应用广泛。-Histogram equalization matlab program to achieve a grayscale image, image enhancement, image preprocessing.