Problem with a function using rgb2ycbcr
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I am trying to do a function using rgb2ycbcr. It converts the image, then shows it up and saves it, but when I call the function, this error appears:
"Subscript indices must either be real positive integers or logicals."
Here's my code:
function x = rgb2yuv( x )
x = rgb2ycbcr(x)
imshow(x)
imwrite(x, 'C:\Users\aaaa\Documents\PDI\Atividade1\imagens\x_rgb2yuv.jpg', 'jpg')
end
What am I doing wrong?
回答（1 个）
Hi Brunna,
I too encountered the same issue. This issue arises because the "rgb2ycbcr" function expects the input to be a valid numeric array representing an RGB image. Kindly refer to the below case as an example:
RGB = imread("board.tif");
YCBCR = rgb2ycbcr(RGB);
Ensure that RGB must be from one of the following formats:
- A c-by-3 colormap, where each row specifies an RGB color value
- An m-by-n-by-3 image matrix
So, to resolve this issue, you need to modify your function as follows:
function x = rgb2yuv(x)
x = imread(x); % Read the image first
x = rgb2ycbcr(x); % Convert to YCbCr
imshow(x); % Display the converted image
imwrite(x, 'C:/Users/aaaa/Documents/PDI/Atividade1/imagens/x_rgb2yuv.jpg', 'jpg'); % Save the output
end
This would ensure that the image is properly read before being processed.
For further reference, kindly refer to the MATLAB documentation below:
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2013-6-11
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