how to draw histogram of an RGB image

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Parveiz Lone 2019-8-3

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/474690-how-to-draw-histogram-of-an-rgb-image

评论： Parveiz Lone 2019-8-18

采纳的回答： KALYAN ACHARJYA

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Parveiz Lone 2019-8-18

My histogram is like that not similar to above histo..is there any problem or it may be version difference i am using 2016 version

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采纳的回答

KALYAN ACHARJYA 2019-8-3

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/474690-how-to-draw-histogram-of-an-rgb-image#answer_386016

编辑：KALYAN ACHARJYA 2019-8-3

在 MATLAB Online 中打开

image_test=imread('Baboon.jpeg');
red_plane=image_test(:,:,1);
green_plane=image_test(:,:,2);
blue_plane=image_test(:,:,3);
[red_data pixel_level]=imhist(red_plane);
[green_data pixel_level]=imhist(green_plane);
[blue_data pixel_level]=imhist(blue_plane);
bar(pixel_level, red_data,'r');
hold on;
bar(pixel_level, green_data,'g');
bar(pixel_level, blue_data,'b');