quantize

quantize

Node.js module for color quantization, based on Leptonica.

Install

npm install quantize

Quick Overview

Usage

var quantize = require("quantize");

var arrayOfPixels = [
  [190, 197, 190],
  [202, 204, 200],
  [207, 214, 210],
  [211, 214, 211],
  [205, 207, 207],
];
var maximumColorCount = 4;

var colorMap = quantize(arrayOfPixels, maximumColorCount);

• arrayOfPixels - An array of pixels (represented as [R,G,B arrays]) to quantize
• maxiumColorCount - The maximum number of colours allowed in the reduced palette

Reduced Palette

The .palette() method returns an array that contains the reduced color palette.

// Returns the reduced palette
colorMap.palette();
// [[204, 204, 204], [208,212,212], [188,196,188], [212,204,196]]

Reduced pixel

The .map(pixel) method maps an individual pixel to the reduced color palette.

// Returns the reduced pixel
colorMap.map(arrayOfPixels[0]);
// [188,196,188]

Author

• Olivier Lesnicki

Contributors

• Nick Rabinowitz
• Mike Bostock

License

Licensed under the MIT License.