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CMYK Channels

Tool to decompose an image in print colors. The separation of the CMYK channels (for the 4 colors Cyan, Magenta, Yellow and Key for Black) is used to analyze the colors of each part of an image.

Cyan/Magenta/Yellow/Black Channels Separation


Answers to Questions

How to separate CMYK values of an image?

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 majenta 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.

Why 'K' in CMYK?

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)

Source code

dCode retains ownership of the source code of the script CMYK Channels online. Except explicit open source licence (indicated Creative Commons / free), any algorithm, applet, snippet, software (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, translator), or any function (convert, solve, decrypt, encrypt, decipher, cipher, decode, code, translate) written in any informatic langauge (PHP, Java, C#, Python, Javascript, Matlab, etc.) which dCode owns rights will not be released for free. To download the online CMYK Channels script for offline use on PC, iPhone or Android, ask for price quote on contact page !

Questions / Comments

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Source : https://www.dcode.fr/cmyk-channels