how to draw histogram of an RGB image

[Parveiz Lone]

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

Answer 1

[KALYAN ACHARJYA]

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');

Note: You can plot all in single matlab line code.

[KALYAN ACHARJYA]

Oh, its a coincidence that the test image is same "Baboon.jpeg"

[Parveiz Lone]

Sir plzz also comment for pixel intensity distribution graph of an image

[KALYAN ACHARJYA]

I have answered, please check.

[Parveiz Lone]

That i have checked and that was perfect But now i need for second one ..scatter plot