Imagick::substituteImage

protected function substituteImage()
{
	if (isset($this->options["substImage"]))
	{
		// substitute the file with a blank image
		$substImage = new Imagick($this->options["substImage"]);

		if ($substImage->load())
		{
			$this->image = clone $substImage->image;
			$this->substituted = true;

			return true;
		}
	}
	return false;
}