com/photo/0031/2013-04-25/8tbfjvft3v8j0031.gif http://img4.(2)

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edgedetect[img] // imagelines[#, 0.28, 0.06] &

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com/photo/0031/2012-10-21/8ea5dp2n3v8j0031.gif http://img4.

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特征点: 6 用agast方法检测特征点: 7 brisk方法: imagekeypoints[img