matlab下实现图像的灰度直方图绘制 以及图像的灰度均衡化处理-Matlab image histogram of the gray scale mapping and image processing gray balance

用matlab对图像做平滑、锐化处理。对其增强，灰度处理，并获得直方图。-Matlab image smoothing, sharpening processing. Its enhanced gray scale processing, and histogram.