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
npm install resemblejs-tolerance
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();Credits:
- Created by James Cryer and the Huddle development team.
- Lukas Svoboda - modification for node.js
- Ivan Kazandzhiev - exposing tolerance for public modification