Create image differential between two images
This was created as part of a visual regression project.
image-diff
depends on ImageMagick.
Please install this before continuing.
Install the module with: npm install image-diff
var imageDiff = require('image-diff');
imageDiff({
actualImage: 'checkerboard.png',
expectedImage: 'white.png',
diffImage: 'difference.png',
}, function (err, imagesAreSame) {
// error will be any errors that occurred
// imagesAreSame is a boolean whether the images were the same or not
// diffImage will have an image which highlights differences
});
image-diff
exposes a function for you to callback with.
Create an differential image between multiple images
- options
Object
- options.actualImage
String
- Path to actual image file- options.actualImage must exist
- options.expectedImage
String
- Path to expected image file- If options.expectedImage does not exist, a transparent image with the same height/width will be created.
- options.diffImage
String
- Path to output differential image
- options.actualImage
In lieu of a formal styleguide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality. Lint via grunt and test via npm test
.
The font used for the example image is Arial 30pt bold and Courier New 38pt.
Copyright (c) 2013 Uber
Licensed under the MIT license.