Skip to content

klassijs/node-resemble.js

master
Switch branches/tags

Name already in use

A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
Code
This branch is 3 commits ahead of lksv:master.

Latest commit

 

Git stats

Files

Permalink
Failed to load latest commit information.
Type
Name
Latest commit message
Commit time
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

node-resemble.js

Analyse and compare images with Javascript. This project does not need canvas or any other binary dependencies. It is a modification of Resemble.js

Get it

yarn add klassijs-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.

// diff.ignoreNothing();
// 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();

Example usuage (in cucumber step definition)

 this.Then(/^Screenshot should match image "(.*)"$/, function (image, callback) {
    browser.takeScreenshot().then(function(pngString) {
      var screenshot = new Buffer(pngString, 'base64');
 
      resemble(image)
        .compareTo(screenshot)
        .onComplete(function(data){
 
          if (Number(data.misMatchPercentage) <= 0.01) {
            callback();
          } else {
            data.getDiffImage().pack().pipe(fs.createWriteStream(image + 'diff.png'));
            callback.fail(new Error("Screenshot '" + image+  "' differ " + data.misMatchPercentage + "%"));
          }
        });
    });
  })

Credits:

About

LOOKING FOR MAINTAINER - Image analysis and comparison

Resources

License

Stars

Watchers

Forks

Releases

No releases published

Packages

No packages published

Languages

  • JavaScript 100.0%