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colorgram-js
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Color extraction library
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README.md
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colorgram-js
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# Colorgram [](https://travis-ci.org/darosh/colorgram-js) Color extraction library. In TypeScript/JavaScript. For browser/server. ## Demo [test/browser_test.html](http://darosh.github.io/colorgram-js/test/browser_test.html) ## Features - small size, 1kB (minified + gzipped) - pretty fast, 512×512 pixels in ~50ms, 340×340 pixels in ~15ms (~6× slower on mobile) - scans every pixel - identical output for rotated images - sampled by top 2 bits of 3 groups: H, L, and [luminance](https://en.wikipedia.org/wiki/Luma_%28video%29#Use_of_luminance) - calculates average per group - fixed memory footprint, samples using 2 (bits) ^ 3 (groups) * 4 (RGB + count) * 4 (Uint32) = 1024 bytes - usually generates small (~16 colors) palette of main colors - supports RGB and RGBA input pixel array (compatible with [ImageData.data](https://developer.mozilla.org/en-US/docs/Web/API/ImageData/data)) - using [TypedArray](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray) - no native dependencies ## Similar stuff - [lokesh/color-thief](https://github.com/lokesh/color-thief) - [leeoniya/RgbQuant.js](https://github.com/leeoniya/RgbQuant.js) - [nrabinowitz/quantize.js](https://gist.github.com/nrabinowitz/1104622) - [igor-bezkrovny/image-quantization](https://github.com/igor-bezkrovny/image-quantization) - [NeuQuant](http://members.ozemail.com.au/~dekker/NEUQUANT.HTML) - [quantization keyword in npm](https://www.npmjs.com/browse/keyword/quantization) - [pngquant](https://pngquant.org/) - [Adobe Color CC](https://color.adobe.com/create/image/) ## Install ```npm install colorgram``` ## Usage See [test](https://github.com/darosh/colorgram-js/tree/master/test) folder. ## TypeScript documentation [http://darosh.github.io/colorgram-js/doc/](http://darosh.github.io/colorgram-js/doc/) ## License [MIT](https://github.com/darosh/colorgram-js/tree/master/LICENSE)
