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extract-colors

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extract-colors

Extract color palettes from images

  • 1.1.5
  • Source
  • npm
  • Socket score

Version published
Weekly downloads
10K
increased by20.4%
Maintainers
1
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Source

Extract Colors

Extract color palettes from images.
Simple use, < 5ko minified, fast process and no dependencies for browser.
Dependency to canvas for node.js

3 examples of colors extraction

Install

For browser

npm install extract-colors

For node.js

Need to install dependency canvas

npm install extract-colors canvas

Usage

Browser

import extractColors from 'extract-colors'

const src = 'my-image.jpg'

extractColors(src)
  .then(console.log)
  .catch(console.error)

Node.js

const path = require('path')
const { extractColors } = require('extract-colors')

const src = path.join(__dirname, './my-image.jpg')

extractColors(src)
  .then(console.log)
  .catch(console.log)

Options

const src = 'my-image.jpg'

const options = {
  pixels: 10000,
  distance: 0.2,
  saturationImportance: 0.2,
  splitPower: 10,
  colorValidator: (red, green, blue, alpha = 255) => alpha > 250
}

extractColors(src, options)
  .then(console.log)
  .catch(console.error)

pixels
Total pixel number of the resized picture for calculation
Type: Integer
Default: 10000

distance
From 0 to 1 is the color distance to not have near colors (1 distance is between white and black)
Type: Number
Default: 0.2

saturationImportance
Power of the saturation weight during the process (0 is not used, 1 is only saturation and not area size)
Type: Number
Default: 0.2

splitPower
Approximation power in the first color splitting during process (from 2 to 16)
Type: Integer
Default: 10

colorValidator
Enable only some colors
Type: Function
Default: (red, green, blue, alpha = 255) => alpha > 250

crossOrigin
Only for browser, can be 'Anonymous' to avoid CORS
Type: String
Default: null

Return of the promise

Array of colors with the followed properties:

[
  {
    hex: '#62342b',
    red: 98,
    green: 52,
    blue: 43,
    area: 0.5915,
    saturation: 0.2156862
  },
  ...
]
FieldExampleTypeDescription
hex#62342bStringcolor in hexadecimal string
red98Integerred canal from 0 to 255
green52Integergreen canal from 0 to 255
blue43Integerblue canal from 0 to 255
area0.5915Numberarea of the color and his neighbouring colors from 0 to 1
saturation0.2156862Numbercolor saturation from 0 to 1

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Package last updated on 29 Oct 2020

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