Each file has its own vector space to search, and the results are numerically sorted within each file.
每个文件都有各自要搜索的向量空间，并且每个文件中的结果都按数字排序。
At the same time the author points out that the polygon vertexes can be sorted clockwise or anticlockwise by judging the sign of the vector polygon area.
同时指出可以通过判断矢量多边形面积的正负值将多边形的顶点按照顺时针或逆时针方向排序。
Secondly, we sorted the feature vector by dictionary, and located the tampered region by utilizing the displacement vectors of image blocks.
然后将特征矢量进行字典排序，并结合图像块的位移矢量，检测且定位出篡改区域。
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