image-js/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;
}