how to show lab space image

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xiao
xiao 2018-5-2
评论： Arthur Fernandes 2018-11-19
lab color space is (0-100),(-128-127),(-128-127), given an image under lab color space, how to show it suitably (imshow is not appropriate)?

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采纳的回答

Ameer Hamza
Ameer Hamza 2018-5-2
What about conversion to RGB before displaying.
imshow(lab2rgb(image));
  2 个评论
xiao
xiao 2018-5-2
then does this have any difference with imshow(imread(image)) directly? Is this just the way what lab space look like?

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更多回答（1 个）

Image Analyst
Image Analyst 2018-5-2
You can look at each channel one at a time
subplot(3, 1, 1);
imshow(labImage(:, :, 1), []);
title('L Image', 'FontSize', 20);
subplot(3, 1, 2);
imshow(labImage(:, :, 2), []);
title('A Image', 'FontSize', 20);
subplot(3, 1, 3);
imshow(labImage(:, :, 3), []);
title('B Image', 'FontSize', 20);
  3 个评论
显示 1更早的评论
Image Analyst
Image Analyst 2018-11-16
If you want a grayscale rendering of the image, not the actual values, you can convert to uint8 and then use a standard format like PNG:
uint8Image = uint8(255 * mat2gray(labImage(:, :, 1)));
imwrite(uint8Image, 'L Channel.PNG');
uint8Image = uint8(255 * mat2gray(labImage(:, :, 2)));
imwrite(uint8Image, 'A Channel.PNG');
uint8Image = uint8(255 * mat2gray(labImage(:, :, 3)));
imwrite(uint8Image, 'B Channel.PNG');
Arthur Fernandes
Arthur Fernandes 2018-11-19
I didn't know about that mat2gray function, I was wandering if Matlab had someting more direct. But still better than using my on code. Thank you!

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