How to assign rgb values to multiple row,col of a matrix ?

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RuiQi
RuiQi 2017-1-17
回答： Guillaume 2017-1-17
for i=1:2%max(label(:))
[rows, cols] = find(label == i);
image(rows,cols,:) = [0,0,0];
end
but I get the error subscripted assignment dimension mismatch

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回答（2 个）

Adam
Adam 2017-1-17
doc sub2ind
Guillaume
Guillaume 2017-1-17
If the R, G and B values are identical:
image(sub2ind(size(image), repmat(rows, 1, 3), repmat(cols, 1, 3), repmat([1 2 3], numel(rows), 1)) = 0;
If not,
image(sub2ind(size(image), repmat(rows, 1, 3), repmat(cols, 1, 3), repmat([1 2 3], numel(rows), 1)) = repmat([R G B], numel(rows), 1);
unfortunately, neither is particularly straightforward.

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