cha_1_4.asv

这是我在学习matlab时写的一些简单的图形处理的例子,初学者可以看一下!

histgram=zeros(1,256); %生成直方图数组;
cdf=zeros(1,256);
[lena,map]=imread('standard_lena.bmp');
[m,n]=size(lena);
for i=1:m
    for j=1:n
        k=lena(i,j);
        histgram(k)=histgram(k)+1;
    end
end
cdf(1)=histgram(1);
for i=2:256
    cdf(i)=cdf(i-1)+histgram(i);
end
for i=1:m
    for j=1:n
        k=lena(i,j);
        lena_equ(i,j)=cdf(k)*256/(m*n);
    end
end
imwrite(lena_equ,map,'lena_equ.bmp');
imshow(uint8(lena_equ));
imhist(uint8(lena_equ));