CMYK Channels

The image will be analyzed in printing color components (4 layers). There are four main colors when printing: Cyan, Magenta, Yellow and Black.

The result will be returned in grayscale for each color. Between 0 for no color and 1 for pure color.

Example: The dCode logo do not have any Cyan (light blue)

Example: For magenta the C is kightly visible

Example: The dominant yellow is very visible

Example: The black draws the contours of the image

In order to accelerate the calculation of channel separation, the image will be resized if it is too large.

From RGB values $ R $, $ V $ and $ B $ between $ 0 $ and $ 1 $ (divide by 255 if the values are between 0 and 255)

CMYK values are calculated using formulas:

$$ K = 1-max(R, G, B) \\ C = (1-R-K) / (1-K) \\ M = (1-G-K) / (1-K) \\ J = (1-B-K) / (1-K) $$

In English, CMYK (instead of CMYB) stands for Cyan, Magenta, Yellow and Black. To not use the B letter for Black (as B stands for Blue in RGB code), term Key is preferred (the black component is often the most important when printing : the key)