学步园

GrayImage = imread('E:/image/matlab/MouseGray.png');%原始的灰度图像<br /> [rows , cols] = size(GrayImage);%得到图像矩阵的行、列数<br /> ZhiFang = zeros(1 , 256);%初始化一个矩阵，用来存储原来灰度图像的直方图<br /> NewZhiFang = zeros(1 , 256);%初始化一个矩阵，用来存储变化之后的灰度图像的直方图<br /> Formula = zeros(1 , 256);%初始化一个矩阵，存储经过变化之后的新的像素值信息<br /> NewGrayImage = uint8(zeros(rows , cols));%初始化一个矩阵，用来存储新的灰度图像</p> <p>for i = 0:255<br /> ZhiFang(1 , i+1) = length(find(GrayImage == i)) / (rows * cols);%计算矩阵GrayImage中值与i相等的元素的个数<br /> end</p> <p>for j = 0:255<br /> for k = 0:j<br /> Formula(1 , j+1) = ZhiFang(1 , k+1) + Formula(1 , j+1);%计算新的像素值信息<br /> end<br /> end</p> <p>for i = 1:rows<br /> for j = 1:cols<br /> NewGrayImage(i , j) = round(Formula(1 , (GrayImage(i , j) + 1)) * 255);%得到新的图像信息<br /> end<br /> end</p> <p>for i = 0:255<br /> NewZhiFang(1 , i+1) = length(find(NewGrayImage == i)) / (rows * cols);%计算矩阵NewGrayImage中值与i相等的元素的个数<br /> end<br /> imwrite(NewGrayImage , 'E:/image/matlab/ZhiFangMouseGray.png' , 'png');</p> <p>%绘制初始灰度图像<br /> figure(1);<br /> imshow(GrayImage);</p> <p>%绘制初始图像的直方图<br /> figure(2);<br /> bar(0:255 , ZhiFang , 'grouped');%根据bar绘制直方图<br /> xlabel('灰度值');<br /> ylabel('出现次数');</p> <p>%绘制变换后的灰度图像<br /> figure(3);<br /> imshow(NewGrayImage);</p> <p>%绘制变换后的图像的直方图<br /> figure(4);<br /> bar(0:255 , NewZhiFang , 'grouped');%根据bar绘制直方图<br /> xlabel('灰度值');<br /> ylabel('出现次数');