dssim-bin

dssim is a tool to compute the (dis)similarity between two or more PNG images using an algorithm approximating human vision.

Comparison is done using the SSIM algorithm (based on Rabah Mehdi's implementation) at multiple weighed resolutions.

Important Notes

• The npm package version doesn't follow semver but matches the dssim binary versions instead.
• dssim@2.8.0 is a complete rewrite in Rust and is currently not supported. If you can help me setting up a build pipeline on Travis CI with precompiled binaries for Linux, Windows and macOS for this package, please open a PR.

Install

To compile dssim, pkg-config needs to be installed first (e.g. via apt-get install pgk-config on Debian/Ubuntu or via Homebrew's brew install pkg-config command on OS X).

$ npm install --save dssim-bin

Usage

var execFile = require('child_process').execFile;
var dssim = require('dssim-bin');

var args = [
    // ...
];

execFile(dssim, args, function (err) {
    console.log('Image minified');
});

CLI

$ npm install --global dssim-bin

$ dssim --help

License

MIT