node-lcms

A little wrapper over LittleCMS utilities.

Installation

You need to have LittleCMS installed. You can build it from source by following these steps (which should work on Unix-based systems, including macOS):

git clone [email protected]:mm2/Little-CMS.git
cd Little-CMS
./configure
make
make check
make install

You can now use node-lcms in your project by installing it from npm into your project:

# using npm
npm install node-lcms

# using yarn
yarn add node-lcms

API reference

convert(options = {}) → function(color_arr)

This is a wrapper over the Little CMS's transicc utility, which converts colors based on ICC profiles.

let { convert } = require('node-lcms');

let conv = convert({
	profile_out: require.resolve('color-profiles/pso-coated-v3.icc')
});

console.log(conv([255, 0, 0]));

intent:

| Value | Description | | ----- | -------------------------------------------- | | 0 | Perceptual | | 1 | Relative colorimetric | | 2 | Saturation | | 3 | Absolute colorimetric | | 10 | Perceptual preserving black ink | | 11 | Relative colorimetric preserving black ink | | 12 | Saturation preserving black ink | | 13 | Perceptual preserving black plane | | 14 | Relative colorimetric preserving black plane | | 15 | Saturation preserving black plane |

Built-in profiles:

| Profile | Description | | ---------- | ----------------------------------------------- | | *Lab2 | D50-based v2 CIELab | | *Lab4 | D50-based v4 CIELab | | *Lab | D50-based v4 CIELab | | *XYZ | CIE XYZ (PCS) | | *sRGB | sRGB color space | | *Gray22 | Monochrome of Gamma 2.2 | | *Gray30 | Monochrome of Gamma 3.0 | | *null | Monochrome black for all input | | *Lin2222 | CMYK linearization of gamma 2.2 on each channel |

Acknowledgements

This project is indebted to James Pederson's node-transicc for instructions on how to install LittleCMS from source and how to interface with it in Node.js.

See also

• color-profiles
• rust-lcms2