JavaScript像素級圖像比較庫：pixelmatch

最小，最簡單，和最快的JavaScript 像素級圖像比較庫，主要設計用于回歸測試的對比截圖。

API

pixelmatch(img1, img2, output, width, height[, threshold, antialiasing])

• img1,img2— Image data of the images to compare (BufferorUint8Array).
• output— Image data to write the diff to.
• width,height— Width and height of the images. Note that all three images need to have the same dimensions.
• threshold— Matching threshold, ranges from0to1. Smaller values make the comparison more sensitive.0.005by default.
• antialiasing— Radius of antialiasing to ignore in pixels.1by default.

Compares two images, writes the output diff and returns the number of mismatched pixels.

Command line

Pixelmatch comes with a binary that works with PNG images:

pixelmatch image1.png image2.png output.png 0.005 1

Install

Install with NPM:

npm install pixelmatch

To build a browser-compatible version, clone the repository locally, then run:

npm install -g browserify
browserify -s pixelmatch index.js > pixelmatch.js

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