Question

求助用Gray world方法对彩色图像进行颜色均衡的Matlab代码！

1)计算图像的R、G、B三分量各自的平均值avgR、avgG、avgB。并得到图像的平均灰度值avgGray=(avgR+avgG+avgB)/3。
2)对图像中每个像素C，计算调整其R、G、B分量C(R)、C(G)、C(B)为： ;
3)将计算后得到的C(R)、C(G) 、C(B)值调整到可显示的范围内，若分量值大于255，调整为255。

Answer 1

I=imread('N.jpg');
y=GrayWorld(I);
figure(1);imshow(I);
figure(2);imshow(y);
function y=GrayWorld(Image)
r=Image(:,:,1);
g=Image(:,:,2);
b=Image(:,:,3);
avgR = mean(mean(r));
avgG = mean(mean(g));
avgB = mean(mean(b));
avgRGB = [avgR avgG avgB];
grayValue = (avgR + avgG + avgB)/3
scaleValue = grayValue./avgRGB;
newI(:,:,1) = scaleValue(1) * r;
newI(:,:,2) = scaleValue(2) * g;
newI(:,:,3) = scaleValue(3) * b;
y=newI