Use node to make a png into an array of 1s and 0s (black and white)

convert-png.js

let fs = require('fs'),
	PNG = require('pngjs').PNG;

fs.createReadStream('./dino_design20by20.png')
	.pipe(new PNG({
		filterType: 4
	}))
	.on('parsed', function () {
		let arr = []
		for (let y = 0; y < this.height; y++) {
			for (let x = 0; x < this.width; x++) {
				let idx = (this.width * y + x) << 2
				let isFilled = this.data[idx] < 128
				arr.push(isFilled ? 1 : 0)
			}
		}
		fs.writeFileSync('data.json', JSON.stringify(arr), () => { })
	})