Grayscale image to rgb image
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Can any one tranform the resultant inverse fourier transform image back to color because I am using the color image for FT.So when i apply IFT the resultant image should be color but I am seeing the gray image.Kindly help me my code is given below.
imageA=imread('lena.bmp');
figure,imshow(imageA)
title('Original Grayscale Lena Image');
imageA=double(rgb2gray(imageA));
fftA=fft2(imageA);
figure,imagesc(abs(fftshift(fftA)));
colormap gray;
imagesc(log(abs(fftshift(fftA))));
title('RGB lena Image Magnitude throught Fourier Transforms');
figure,imshow(angle(fftshift(fftA)),[-pi,pi]),colormap gray
title('RGB Lena Image Phase through fourier transform');
fftB = abs(fftA).*exp(i*angle(fftA));
imageB=ifft2(fftB);
cmin=min(min(abs(imageB)));
cmax=max(max(abs(imageB)));
figure,imshow(abs(imageB),[cmin cmax]); colormap in2rgb;
title('RGB Resultant Image Magnitude By inverse Fourier Transform');
回答（2 个）
Dr. Deepak Kumar Rout
2012-9-21
0 个投票
You have to find DFT of RGB frames of the color image and then back in order to get color image or if u have converted the color image to gray before conversion then you simply use a pseudocolor image processing algorithm to it
2 个评论
Algorithms Analyst
2012-9-21
Image Analyst
2012-9-21
I don't agree with that. Pseudocoloring has nothing to do with it. You can fft each color plane, then filter, then inverse fft, and use cat(3,r,g,b) to recombine into a color image.
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2012-9-21
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