特征点匹配 feature matching
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在获得了兴趣点之后，利用兴趣点处的局部灰度差分不变量进行序列图像的点特征匹配。
Once the interest points were detected, the image matching process in an image sequence is performed using local gray-value differential invariants.
该匹配方法在弱纹理区域比点特征匹配方法具有明显的优势，能够较好地满足应用需求。
The performance of the proposed algorithm is better than that of the point-based method, especially in weak texture areas.
/ 来自于文件名的 /usr/home/builds/daily./ 部分（这个 Perl 表达式中的系列点，匹配诸如 .080908 之类的日期规约的七个特征）。
(The series of dots in this Perl expression matches the seven characters of date specifications such as .080908.)
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