Extracts an image RGBA pixels as a ndarray with shape [width, height, 4]. If a dtype is provided as a second parameter, allocates a new typed array of the given type for use as the ndarray underlying data.
$ npm install ndarray-from-imagevar ndarrayFromImage = require('ndarray-from-image');
var img = document.getElementById('img');
var arr = ndarrayFromImage(img/*, 'float32' */); // takes an optional dtype as a second parameter
/*
arr now contains the canvas RGBA pixels as a ndarray
of shape [canvas.width, canvas.height, 4]
*/
var value = arr.get(0, 0, 0); // will return the red value for the pixel of coordinates [0, 0].
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