function editor($field, $value) {
		$setting = string2array($this->fields[$field]['setting']);
		$enablesaveimage = $setting['enablesaveimage'];
		$site_setting = string2array($this->site_config['setting']);
		$watermark_enable = intval($site_setting['watermark_enable']);
		$value = $this->attachment->download('content', $value,$watermark_enable);
		return $value;
	}