Gray image to rgb image
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I converted a color image to gray using rgb2gray and denoised the image. Now i wanted to convert the denoised gray image to a color image... Is it possible.... Please can someone help me.... Please do reply....
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Image Analyst
2013-8-27
1 个投票
You can use ind2rgb() but you have to supply a colormap. It won't look like the original colors though - you lost those when you went to gray. Why don't you just denoise each channel one at a time? Or convert to hsv and denoise just the v channel. Either of those methods will not lose the color information like your method does.
3 个评论
Image Analyst
2013-8-27
MATLAB has a rgb2ycbcr function and ycbcr2rgb function - try that. ALso, why are your arrays 4D arrays? Inside the custom-written functinos they're 3D arrays but I don't even know why they're that. Why aren't they 2D arrays like normal?
kailas jobu
2022-2-19
i have this code that filters image,but when i use it with a colored image it turns grayscale. could you help me?
I = imread('phonebox2_noisy.bmp');
Im = rgb2gray(I);
noisy = imnoise(Im, 'salt & pepper',0.1);
[m,n] = size(noisy);
output = zeros(m,n);
output = uint8(output);
for i = 1:m
for j = 1:n
xmin = max(1,i-1);
xmax = min(m,i+1);
ymin = max(1,j-1);
ymax = min(n,j+1);
temp = noisy(xmin:xmax, ymin:ymax);
output(i,j) = median(temp(:));
end
end
figure(1);
set(gcf, 'Position', get(0,'ScreenSize'));
subplot(131),imshow(I),title('Original Image');
subplot(133),imshow(output),title('filtered image');
Image Analyst
2022-2-19
@kailas jobu, after you read this
attach 'phonebox2_noisy.bmp' in your own, new question.
Also attach the "noisy()" function. And you might want to consider medfilt2() instead of median.
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