Image-Diff 介绍
Image-
Diff是一款Uber开源的图片差异化处理工具，依赖ImageMagick。
安装 & 使用：
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
});