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  • matlab练习程序(灰度图直方图均衡化)

    cl;
    img=imread('mask.jpg');
    imshow(img);
    [x,y]=size(img);
    img_man=zeros(x,y);
    img_com=zeros(x,y);

    %% 直方图均衡化算法
    Max=max(max(img));
    Min=min(min(img));
    Hist=zeros(1,256);
    for i=1:x
    for j=1:y
    Hist(img(i,j)+1)=Hist(img(i,j)+1)+1;
    end
    end
    figure,plot(Hist);

    p=zeros(1,256);
    for i=1:256
    p(i)=Hist(i)/(x*y);
    end
    figure,plot(p);

    c=zeros(1,256);
    for i=1:256
    c(i)=sum(p(1:i));
    end
    figure,plot(c);

    for i=1:x
    for j=1:y
    img_man(i,j)=c(img(i,j)+1)*(Max-Min)+Min;
    end
    end

    figure,imshow(uint8(img_man))

    Hist2=zeros(1,256);
    for i=1:x
    for j=1:y
    Hist2(img_man(i,j)+1)=Hist2(img_man(i,j)+1)+1;
    end
    end
    figure,plot(Hist2);

    %% matlab直方图均衡化函数
    img_com=histeq(img);
    figure,imshow(img_com)

    Hist3=zeros(1,256);
    for i=1:x
    for j=1:y
    Hist3(img_com(i,j)+1)=Hist3(img_com(i,j)+1)+1;
    end
    end
    figure,plot(Hist3);
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  • 原文地址:https://www.cnblogs.com/tiandsp/p/2379283.html
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