Reasonably setting the threshold value, SIFT algorithm can handle the technical problems such as cutting the object from its background.

合理设置SIFT算法的阈值还可以有效处理物体背景分割等技术问题。

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Abstract : The Scale-invariant Feature Transform(SIFT) algorithm was improved in this paper, which could match two pictures and could also compute the object rotation angles in the pictures.

摘要 ： 改进了传统的尺度不变特征变换（SIFT）算法，使其在进行图像匹配的同时，可以求取出物体的旋转角度。

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