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

I have a set of colourful images and I want to get the values of CMYK for each images using loop . how can i do that ?

Answer 1

[Constantino Carlos Reyes-Aldasoro]

If you want hue and saturation, then what you need is to transform from RGB to HSV, try rgb2hsv.

Answer 2

[KALYAN ACHARJYA]

"I want to get the values of CMYK for each images using"

One way: If the imahes is RGB, then youn can use the following to get the CMYK

C= 255-Red_component;
M= 255-Green_component;
Y= 255-Blue_component;

Other way: rgb2cmtk or here

C=cmyk_image(:,:,1);
M=cmyk_image(:,:,2);
Y=cmyk_image(:,:,3);
K=cmyk_image(:,:,4);

Here loop may issue here, its FAQ to call images one by one and do processing

images=
for i=1:length(images)
im_data=imread(' ')
%RGB2CMYK
% Extract CMYK data
end

Here rgb2hsv, Suggest to read more here

[ahmad Al sarairah]

I got an error ('Undefined function or variable 'rgb2cmyk'). I used the following code :

cform = makecform('srgb2cmyk');

cmykI = applycform(I_CMYK,cform);

but i need to apply this code using loop , then i need to extract x,m,y, k vlaues .

[KALYAN ACHARJYA]

Here Use the code (See results)

%RGB to CMYK:
I_rgb = imread('lena_color.jpg'); %Read the color image 
C = makecform('srgb2cmyk');     %srgb (standard rgb) to cmyk 
I_CMYK= applycform(I_rgb,C);

[ahmad Al sarairah]

ok, How to use this code of the hundred and forty pictures and then extract the values of c,m,y,k and put them in structure array .

[Image Analyst]

See the FAQ: How_can_I_process_a_sequence_of_files?