一、简介

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二、源代码

Image = double(imread('yaogan1.bmp'));
imshow(uint8(Image))
[height,width]=size(Image);
NewImage=zeros(height,width,3);
for i=1:height
    for j=1:width
        if  Image(i,j)<52
            NewImage(i,j,1)=16; NewImage(i,j,2)=25;  NewImage(i,j,3)=64;       
        elseif  Image(i,j)<92
            NewImage(i,j,1)=27; NewImage(i,j,2)=45;  NewImage(i,j,3)=125;      
        elseif Image(i,j)<115
            NewImage(i,j,1)=101;  NewImage(i,j,2)=146; NewImage(i,j,3)=79;       
        elseif Image(i,j)<170
            NewImage(i,j,1)=115;  NewImage(i,j,2)=156;   NewImage(i,j,3)=142;
        else
            NewImage(i,j,1)=213;
            NewImage(i,j,2)=222;
            NewImage(i,j,3)=159;
        end
    end
end
Image=double(imread('Brain.jpg'));
[height,width]=size(Image);
NewImage=zeros(height,width,3);
L=255;
for i=1:height
    for j=1:width
        if Image(i,j)<=L/4
            NewImage(i,j,1)=0; 
            NewImage(i,j,2)=4*Image(i,j); 
            NewImage(i,j,3)=L;
        else if Image(i,j)<=L/2
            NewImage(i,j,1)=0; 
            NewImage(i,j,2)=L; 
            NewImage(i,j,3)=-4*Image(i,j)+2*L;
         else if Image(i,j)<=3*L/4
            NewImage(i,j,1)=4*Image(i,j)-2*L; 
            NewImage(i,j,2)=L; 
            NewImage(i,j,3)=0; 

三、运行结果

四、备注

版本：2014a
完整代码或代写加1564658423