![](https://csdnimg.cn/release/download_crawler_static/86606594/bg1.jpg)
image=imread('1.jpg');
image=image(:,:,2);
imshow(image);
[m,n]=size(image);
a=100;
b=200;
ga=50;
gb=250;
A=ga/a;
B=(gb-ga)/(b-a);
C=(255-gb)/(255-b);
for i=1:m
for j=1:n
if (image(i,j)>=0&image(i,j)<a)
result(i,j)=A*image(i,j);
end
if (image(i,j)>=a&image(i,j)<b)
result(i,j)=B*(image(i,j)-a)+ga;
end
if (image(i,j)>=b&image(i,j)<=255)
result(i,j)=C*(image(i,j)-b)+gb;
end
end
end
figure(2)
imshow(result);
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