Checkmark 是数字水印中应用的攻击测试软件，是每个在做数字水印的人的必须使用的工具，这个文章告诉你怎么使用checkmark-Checkmark is the application of digital watermarking attacks testing software, are each at digital watermarking to do the people have to use a tool, this article tell you how to use c

checkmark是一款数字水印攻击测试软件，很实用的软件！-checkmark is a digital watermarking attack testing software, very useful software!

在一张有圆形的图片中利用matlab软件采用hough变换检测圆形，-In a picture using a round using hough transform matlab software testing round,