how to apply dct on each color plane of an RGB image

given a 2d image i understand how to apply the dct but how do i separate a 3d color image into its rgb color planes and apply the dct to each plane?

[Omung Puri]

Separete each pane first and then do it. you have to separate R G and B of the Image.

[Image Analyst]

Yes, and the code for that was given below 4 years ago.

Answer 1

[Image Analyst]

% Extract the individual red, green, and blue color channels.
redChannel = rgbImage(:, :, 1);
greenChannel = rgbImage(:, :, 2);
blueChannel = rgbImage(:, :, 3);

After that, you said "i understand how to apply the dct" so just do that on each individual color channel.