reset(imageData, x, y, d) {
    this.imageData = imageData;
    this.x = Util.initValue(x, 0);
    this.y = Util.initValue(y, 0);
    this.d = Util.initValue(d, 2);

    this.vectors = [];
    this.setVectors();
  }
Resets the ImageZone with new parameters.
@param {ImageData} imageData - The image data to use for the zone.
@param {number} [x=0] - The x-coordinate offset.
@param {number} [y=0] - The y-coordinate offset.
@param {number} [d=2] - The sampling density.