public function ToJPEG($quality = null, $backgroundColor = null)
	{
        if (!$quality) $quality = Config::inst()->get('ExtendedImage', 'get_jpeg_default_quality');
		if (!$backgroundColor) $backgroundColor = Config::inst()->get('ExtendedImage', 'get_jpeg_default_background_color');

		return $this->owner->getJPEGImage($quality, $backgroundColor);

	}