voluptasquisquam/src/image/utility/getMatrix.js

Image processing and manipulation in JavaScript

import Matrix from 'ml-matrix';

/**
 * @memberof Image
 * @instance
 * @param {object} [options]
 * @param {number} [options.channel]
 * @return {Matrix}
 */
export default function getMatrix(options = {}) {
    let {channel} = options;
    this.checkProcessable('getMatrix', {
        bitDepth: [8, 16]
    });

    if (channel === undefined) {
        if (this.components > 1) {
            throw new RangeError('You need to define the channel for an image that contains more than one channel');
        }
        channel = 0;
    }

    let matrix = new Matrix(this.height, this.width);
    for (let x = 0; x < this.height; x++) {
        for (let y = 0; y < this.width; y++) {
            matrix.set(x, y, this.getValueXY(y, x, channel));
        }
    }

    return matrix;
}