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color-finder

v1.3.2

Published

This class can get you a common color from the image by url. But be careful of ussing this as there are Cross Origin policy which may block some images from different domains.

Downloads

6

Readme

color-finder Build Status Coverage Status

This class can get you a common color from the image by url. But be careful of ussing this as there are Cross Origin policy which may block some images from different domains.

Live Demo: http://preview.16mb.com/color-finder/

Installation

Using bower:

bower install color-finder --save

Using npm:

npm install color-finder

or just download latest release from Github.

Usage

ColorFinder.fromImage('http://....jpg', function(color) {...})

color is an array which contains RGB value (ex. [234, 48, 255]).

Additional Configuration

You can specify maximum value for RGB complement by calling:

ColorFinder.setConfig('maxColorValue', 230) type:Number [230 by default]

Here 230 will be limit for every color complement (R < 230, G < 230, B < 230).

ColorFinder.setConfig('quality', 10) type:Number [10 by default]

quality will affect amount of pixels being processed to determine common color. This value may affect performance.

ColorFinder.setConfig('colorsAmount', 10) type:Number [10 by default]

colorsAmount also affects the quality of final color but in later stage of quantization process. This value does not affect performance ( if colorsAmount is in good range (= ).

ColorFinder.setConfig('useWebWorker', true) type:Boolean [true by default]

useWebWorker will perform all heavy calculations in Web Worker thread if available in browser

ColorFinder.setConfig('workerPrefixPath', "") type:String ["" (empty string) by default]

workerPrefixPath will be added to the url path to web worker. In case you have different url path - you can use this value to make worker work.

Development

To build this package run gulp

To run tests run npm test

Known Issues

  • You may face an issue when a callback function did not invoke at all.
    Most probably the web worker is not loaded properly (you can verify that by checking browser and server requests log). If that is a problem - correct path to web worker by setting ColorFinder.setConfig('workerPrefixPath', "your/path/") to right url prefix.

Credits

  • Nick Rabinowitz – Thanks for the modified median cut quantization JS port (http://www.leptonica.com)

Author

Alex Malkevich