抽出抠散发，可以去掉边缘杂色
原图：[img]http://www.zhumeng.org/attachments/fileType/jpg.gif[/img]此主题相关图片
[url=http://www.zhumeng.org/attachments/2007/01/16/231912.jpg][img]http://www.zhumeng.org/attachments/2007/01/16/231912s.jpg[/img][/url]
效果图：
[img]http://www.zhumeng.org/attachments/fileType/jpg.gif[/img]此主题相关图片
[url=http://www.zhumeng.org/attachments/2007/01/16/232023.jpg][img]http://www.zhumeng.org/attachments/2007/01/16/232023s.jpg[/img][/url]
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