resemblejs-tolerance

Analyse and compare images with Javascript. This project does not need canvas or any other binary denpendencies. It is a modification of node-resemble-js

Get it

npm install node-resemble-js

Example

Retrieve basic analysis on image.

var api = resemble(fileData).onComplete(function(data){
    console.log(data);
    /*
    {
      red: 255,
      green: 255,
      blue: 255,
      brightness: 255
    }
    */
});

Use resemble to compare two images.

var diff = resemble(file).compareTo(file2).ignoreColors().onComplete(function(data){
    console.log(data);
    /*
    {
      misMatchPercentage : 100, // %
      isSameDimensions: true, // or false
      dimensionDifference: { width: 0, height: -1 }, // defined if dimensions are not the same
      getImageDataUrl: function(){}
    }
    */
});

You can also change the comparison method after the first analysis.

    var tolerance = { // between 0 and 255
        red: 16,
        green: 16,
        blue: 16,
        alpha: 16,
        minBrightness: 16,
        maxBrightness: 240
    };
// diff.setTolerance(tolerance);
// diff.ignoreColors();
// diff.ignoreAntialiasing();
 

And change the output display style.

resemble.outputSettings({
  errorColor: {
    red: 255,
    green: 0,
    blue: 255
  },
  errorType: 'movement',
  transparency: 0.3
});
// resembleControl.repaint();

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Credits:

• Created by James Cryer and the Huddle development team.
• Lukas Svoboda - modification for node.js
• Ivan Kazandzhiev - exposing tolerance for public modification