对256灰度级，以及真彩色图形进行直方图均衡化处理-Of 256 gray-scale and true color graphics to deal with histogram equalization

用MATLAB首先显示彩色图像，然后显示灰度化后的图像，再绘制直方图，直方图均衡化-MATLAB show color image first, and then according to gray image, to draw the histogram, the histogram equalization

彩色图像的预处理，灰度化，直方图均衡化， gaussian低通滤波器锐化，laplacian算子锐化-Color image processing, gray, histogram equalization, gaussian low pass filter, Laplacian operator sharpening