How to get the hue/saturation of a colourful images?

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ahmad Al sarairah
ahmad Al sarairah 2019-12-29
编辑： Guillaume 2020-1-8
I have a set of color images and I want to get the values of hue and saturation and brightness using matlab , But I want to get the values quickly for all the images because the number of images is too large.
thanks to all.

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回答（2 个）

KALYAN ACHARJYA
KALYAN ACHARJYA 2019-12-29
rgb2hsv and get the data
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Image Analyst
Image Analyst 2019-12-29
See the FAQ: https://matlab.fandom.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F
Then inside the loop over k, call rgb2hsv(). If you want the means, do
hsvImage = rgb2hsv(rgbImage);
hmean(k) = mean2(hsvImage(:, :, 1))
smean(k) = mean2(hsvImage(:, :, 2))
vmean(k) = mean2(hsvImage(:, :, 3))
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Image Analyst
Image Analyst 2020-1-7
mean2() is a function in the Image Processing Toolbox that takes the mean of a 2-D array. It's basically the same as mean(array(:)).
Guillaume
Guillaume 2020-1-8
编辑：Guillaume 2020-1-8
Or since R2018b, you can also use mean(array, 'all'). There's not much need for mean2 anymore. You could also calculte the mean of all 3 channels at once as a 1x3 vector with:
hsvmean = squeeze(mean(hsvImage, [1, 2])); %requires R2018b or later

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