?? Index exceeds matrix dimensions.
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Please can any body tell me whats wrong with my code? Its giving error on the 'If' statement. '??? Index exceeds matrix dimensions.'
function color()
img = imread('peppers.png');
r = img(:,:,1);
g = img(:,:,2);
b = img(:,:,3);
[m n] = size(img);
for i = 1:m
for j = 1:n
if ((r(i,j) - g(i,j)) >= 200) %&& mod(r(i,j) - b(i,j)) >= 200)
im = r(i,j);
else
im = 0;
end
end
end
imshow(im);
1 Commento
Fangjun Jiang
il 17 Dic 2011
Don't use color as the function name. Strange enough, help color and doc color give me different type of function help.
Risposte (1)
Jan
il 16 Dic 2011
img = rand(2,3,4);
[m n] = size(img);
Now m is 2 as expected, but n is 12, the product of all trailing dimensions. Either use:
[m, n, dummy] = size(img);
or
[m, n] = size(r);
The program overwrite im in each iteration. I assume you want to set im(i,j) instead.
A more efficient approach without a loop:
r = img(:, :, 1);
g = img(:, :, 2);
im = r;
im(r - g > 200) = 0;
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