加水印类
http://hi.baidu.com/%C0%BC%C0%BCsns/blog/item/534b78915575281b7bf48017.html
?
http://www.cardii.net/php-use-imagemagick/
无关
http://hi.baidu.com/%D5%E4%B2%D8%B5%C4%C7%E9%CA%E9/blog
