gray2rgb conversion
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Unable to perform assignment because the size of the left side is 245-by-744 and the size of the right side is 245-by-248-by-3.
Error in untitled>gray2rgb (line 20)
rgb(:,:,1)=Image;
Error in untitled (line 8)
rgb=gray2rgb(I);
1 Comment
Shashank Sharma
on 16 Jul 2019
RGB Images are three channel. Each pixel has it's own R, G, B values.
A grayscale has only one channel.
The gray2rgb function returns a m by n by 3 matrix for an input of m by n image.
If you have predifined the size of rgb it will cause the above error.
Answers (1)
Walter Roberson
on 16 Jul 2019
When you allocated memory for the rgb array, you used something like,
[rows, cols] = size(Image);
rgb = zeros(rows, cols, 3);
This is not correct code when Image is RGB. When you have
[var1, var2, var3, ..., varn] = size(Array)
and Array has more than n dimensions, then the last entry (varn here) will be the product of all remaining dimensions.
[rows, cols] = size(Image);
is not the same as
image_size = size(Image);
rows = image_size(1); cols = image_size(2);
What you should use is
rgb = zeros(size(Image));
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