?? 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 个评论
Fangjun Jiang
2011-12-17
Don't use color as the function name. Strange enough, help color and doc color give me different type of function help.
回答(1 个)
Jan
2011-12-16
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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