Here is Nodejs module for generate photo histogram without canvas or any dependecies!
npm install --save his4gram
var his4gram = ;// generate photo histogram with default setting. Just give input and output path.;
Thank to the nice Nodejs module
jimp. that give us freedom from canvas and any dependecies.
### Setting will update this part soon. from now, just look in /test/index.js for how setting are and how it work.