retinex 采用中心环绕函数的retinex算法

采用中心环绕函数的retinex算法，可以对于暗视觉的图像进行有效的增强

I = imread（‘C:\MATLAB7\work\1.jpg‘）;
subplot（121）;
imshow（I）;

f=I（::1）;
ff=I（::2）;
fff=I（::3）;
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
k1=4;
k2=5;
r=161;
alf=1600;
nn=floor（（r+1）/2）;
for i=1:r
    for j=1:r
        b（ij） =exp（-（（i-nn）^2+（j-nn）^2）/（k1*alf））/（k2*pi*alf*10000）;        %高斯函数1
   end
end

k1=8;
k2=8;
r=161;
alf=1400;
nn=floor（（r+1）/2）;
for i=1:r
    for j=1:r
        bb（ij） =exp（-（（i-nn）^2+（j-nn）^2）/（k1*alf））/（k2*pi*alf*10000）;        %高斯函数2
   end
end

k1=0.5;
k2=0.5;
r=161;
alf=1458;
nn=floor（（r+1）/2）;
for i=1:r
    for j=1:r
        bbb（ij） =exp（-（（i-nn）^2+（j-nn）^2）/（k1*alf））/（k2*pi*alf*10000）;        %高斯函数2
   end
end
%%%%%%%%%%%对R分量的处理%%%%%%%%%%%%%
Img = double（f）;
[mn]=size（f）;

K=imfilter（Imgb）;
KK=imfilter（Imgbb）;
KKK=imfilter（Imgbbb）;

for i=1:m
    for j=1:n      
       G（ij）=1/3*（log（Img（ij）+1）-log（K（ij）+1））;
        G（ij）=1/3*（log（Img（ij）+1）-log（KK（ij）+1））+G（ij）;
         G（ij）=1/3*（log（Img（ij）+1）-log（KKK（ij）+1））+G（ij）;
    end
end

mi=min（min（G））;
ma=max（max（G））;

       L=（G-mi）*255/（ma-mi）;
%%%%%%%%%%%%%%对G分量的处理%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Img = double（ff）;
[mn]=size（ff）;

K=imfilter（Imgb）;
KK=imfilter（Imgbb）;
KKK=imfilter（Imgbbb）;

for i=1:m
    for j=1:n      
       G（ij）=1/3*（log（Img（ij）+1）-log（K（ij）+1））;
        G（ij）=1/3*（log（Img（ij）+1）-log（KK（ij）+1））+G（ij）;
         G（ij）=1/3*（log（Img（ij）+1）-log（KKK（ij）+1））+G（ij）;
    end
end

mi=min（min（G））;
ma=max（max（G））;

       LL=（G-mi）*255/（ma-mi）;
%%%%%%%%%%%%%随B分量的处理%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Img = double（fff）;
[mn]=size（fff）;

K=imfilter（Imgb）;
KK=imfilter（Imgbb）;
KKK=imfilter（Imgbbb）;


for i=1:m
    for j=1:n      
       G（ij）=1/3*（log（Img（ij）+1）-log（K（ij）+1））;
        G（ij）=1/3*（log（Img（ij）+1）-log（KK（ij）+1））+G（ij）;
         G（ij）=1/3*（log（Img（ij）+1）-log（KKK（ij）+1））+G（ij）;
    end
end

mi=min（min（G））;
ma=max（max（G））;

       LLL=（G-mi）*255/（ma-mi）;

%%%%%%%%%%%%对彩色图像的综合处理 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
msr=cat（3LLLLLL）;
subplot（122）;
imshow（uint8（msr））;
imwrite（uint8（msr）‘msrretnx.bmp‘）;

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2012-10-22 16:14  i   retinex\
     目录           0  2012-08-06 10:46  i   retinex\21RETINEX\
     目录           0  2012-08-06 10:46  i   retinex\21RETINEX\RETINEX算法\
     文件        2239  2008-11-28 17:04  i   retinex\21RETINEX\RETINEX算法\MSR.m
     文件        2626  2008-11-21 23:36  i   retinex\21RETINEX\RETINEX算法\MSRCR.m
     文件        2714  2008-11-28 16:30  i   retinex\21RETINEX\RETINEX算法\retinex.m
     文件        1021  2008-11-28 16:45  i   retinex\21RETINEX\RETINEX算法\SSR.m