图像增强、图像形态学变换等matlab图像预处理代码

I = imread('4.png'); I = rgb2gray(I); [height,width] = size(I); figure,imshow(I)%显示原始图像 figure,imhist(I)%显示原始图像直方图 %进行像素灰度统计; NumPixel = zeros(1,256);%统计各灰度数目，共256个灰度级 for i = 1:height for j = 1: width NumPixel(I(i,j) + 1) = NumPixel(I(i,j) + 1) + 1;%对应灰度值像素点数量增加一 end end %计算灰度分布密度 ProbPixel = zeros(1,256); for i = 1:256 ProbPixel(i) = NumPixel(i) / (height * width * 1.0); end %计算累计直方图分布 CumuPixel = zeros(1,256); for i = 1:256 if i == 1 CumuPixel(i) = ProbPixel(i); else CumuPixel(i) = CumuPixel(i - 1) + ProbPixel(i); end end %累计分布取整 CumuPixel = uint8(255 .* CumuPixel + 0.5); %对灰度值进行映射（均衡化） for i = 1:height for j = 1: width I(i,j) = CumuPixel(I(i,j)+1); end end figure,imshow(I)%显示原始图像 figure,imhist(I)%显示原始图像直方图