1.0.0 • Published 9 years ago
ndarray-from-canvas v1.0.0
ndarray-from-canvas
Extracts a canvas RGBA pixels as a ndarray
Extracts a canvas 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.
Install
$ npm install ndarray-from-canvas
Usage
var ndarrayFromCanvas = require('ndarray-from-canvas');
var canvas = document.getElementById('canvas');
var arr = ndarrayFromCanvas(canvas/*, '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].
1.0.0
9 years ago