快速处理灰度图转彩色图方法

之前看一篇博文，里面有转的过程，从Fast and Robust Pyramid-based Image Processing 2011论文里也有相关的处理过程，我就编写了下来。

close all;clear all;
Img= imread('lena1.jpg');
imshow(Img);title('原图');figure;
I= rgb2gray(Img);
Ir=Img(:,:,1);
Ig=Img(:,:,2);
Ib=Img(:,:,3);
Irx=double(Ir)./double(I);
Igx=double(Ig)./double(I);
Ibx=double(Ib)./double(I);
I02 = ((double(I)/255).^0.2);imshow(I02);title('I02');figure;
I04 = ((double(I)/255).^0.4);imshow(I04);title('I04');figure;
I06 = ((double(I)/255).^0.6);imshow(I06);title('I06');figure;
I08 = ((double(I)/255).^0.8);imshow(I08);title('I08');figure;
I12 = ((double(I)/255).^1.2);imshow(I12);title('I12');figure;
I14 = ((double(I)/255).^1.4);imshow(I14);title('I14');figure;
I16 = ((double(I)/255).^1.6);imshow(I16);title('I16');figure;
I18 = ((double(I)/255).^1.8);imshow(I18);title('I18');figure;
I20 = ((double(I)/255).^2.0);imshow(I20);title('I20');
figure;
newIr=(I12).*Irx;
newIg=(I12).*Igx;
newIb=(I12).*Ibx;
newImage=cat(3,newIr,newIg,newIb);
imshow(newImage,[]);title('彩色图');