https://github.com/thibauts/apply-cube-lut

Apply a Cube (IRIDAS/Adobe) LUT to an image
https://github.com/thibauts/apply-cube-lut

Last synced: 2 months ago
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Apply a Cube (IRIDAS/Adobe) LUT to an image

• Host: GitHub
• URL: https://github.com/thibauts/apply-cube-lut
• Owner: thibauts
• License: mit
• Created: 2015-10-03T18:39:37.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2021-11-08T04:04:38.000Z (about 3 years ago)
• Last Synced: 2024-11-01T01:53:05.526Z (2 months ago)
• Language: JavaScript
• Size: 87.9 KB
• Stars: 35
• Watchers: 8
• Forks: 9
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
apply-cube-lut

==============

### Apply a Cube (IRIDAS/Adobe) LUT to an image

Applies a Cube LUT to an image. See [parse-cube-lut](https://github.com/thibauts/parse-cube-lut) for Cube LUT parsing.

LUT files are useful for color grading, encapsulating complex color-space transforms or emulating film stock for photography and video.

Example

-------

Photograph transformed with a Fuji 400H stock emulation LUT.

 

Install

-------

```bash

$ npm install apply-cube-lut

```

Usage

-----

```javascript

var applyCubeLUT = require('apply-cube-lut');

var parseCubeLUT = require('parse-cube-lut');

var ndarrayFromImage  = require('ndarray-from-image');

var canvasFromNdarray = require('canvas-from-ndarray');

var ops = require('ndarray-ops');

var lutURL = 'test.cube';

var imgURL = 'test.jpg';

var req = new XMLHttpRequest();

var img = new Image();

req.onload = function() {

  img.onload = function() {

    // once both the image and LUT data are loaded

    var lut = parseCubeLUT(req.responseText);

    var arr = ndarrayFromImage(img, 'float32');

    // convert RGBA components to 0.0 -> 1.0

    ops.mulseq(arr, 1.0 / 255.0);

    // apply LUT

    applyCubeLUT(arr /* dest */, arr /* src */, lut);

    // convert back to 0.0 -> 255.0

    ops.mulseq(arr, 255.0);

    // display transformed image

    var canvas = canvasFromNdarray(arr);

    document.body.appendChild(canvas);

  };

  

  img.src = imgURL;

};

req.open('GET', lutURL, true);

req.send();

```