fixed centroid 中文意思是什麼
fixed centroid
解釋
固定極心線-
We presented a novel method of searching for similar fragments of 3d curves, with this method, a hash vector is associated with each fixed - length fragments of 3d sherd. each vector consists of low frequence component of fourier - like spectrum for the distance between profile curve and the centroid
討論了基於hash矢量和fourier變換的輪廓曲線匹配方法,在匹配中不要求一段輪廓線與另外一段輪廓線完全匹配,而是把它們分成很多子段,再用這些子段來進行匹配。 -
This algorithm adopts a middle ground between centroid - base and all - points - based approaches. instead of using a single centroid or all points to represent a cluster, a fixed number of representative points in space are chosen, these points represent and capture the geometry and shape of the cluster. in addition. the representative points of a cluster are generated by first selecting well - scattered objects for the cluster and then " shrinking " or moving them toward the cluster center by a specified fraction, or shrinking factor. the shrinking helps dampen the effects of outliers. therefore, cure is more robust to outliers
該演算法選擇基於質心利基於代表對象方法之間的中間策略,它不用單個質心或簇中全部對象米代表一個簇,而是選擇數據空間中定數目的只有代表性的點,這些點代表和捕捉到了簇的形狀。此外,由於引入了收縮因子使代表點向簇小心「收縮」而使該演算法能夠較好地消除孤立點的影響,在處理孤立點上也更加健壯。
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