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一种基于扇形区域分割的SIFT特征描述符

曾峦 顾大龙

曾峦, 顾大龙. 一种基于扇形区域分割的SIFT特征描述符. 自动化学报, 2012, 38(9): 1513-1519. doi: 10.3724/SP.J.1004.2012.01513
引用本文: 曾峦, 顾大龙. 一种基于扇形区域分割的SIFT特征描述符. 自动化学报, 2012, 38(9): 1513-1519. doi: 10.3724/SP.J.1004.2012.01513
ZENG Luan, GU Da-Long. A SIFT Feature Descriptor Based on Sector Area Partitioning. ACTA AUTOMATICA SINICA, 2012, 38(9): 1513-1519. doi: 10.3724/SP.J.1004.2012.01513
Citation: ZENG Luan, GU Da-Long. A SIFT Feature Descriptor Based on Sector Area Partitioning. ACTA AUTOMATICA SINICA, 2012, 38(9): 1513-1519. doi: 10.3724/SP.J.1004.2012.01513

一种基于扇形区域分割的SIFT特征描述符

doi: 10.3724/SP.J.1004.2012.01513
详细信息
    通讯作者:

    曾峦

A SIFT Feature Descriptor Based on Sector Area Partitioning

  • 摘要: 提出了一种在圆形区域内基于扇形区域分割的特征描述符构建方法. 首先, 针对SIFT描述符维数过高, 导致匹配速度慢的弱点, 提出在半径为9像素的圆形特征区域内划分为8个扇区, 在这些扇形特征邻域内统计8个方向的灰度梯度直方图, 形成64维描述符的方法,降低了描述符的维数. 同时, 针对SIFT构建描述符的运算复杂性较高的事实, 提出在圆形区域内计算像素灰度梯度主方向, 以主方向为基准点把该区域划分为8个等面积扇区的方法, 取消了对特征区域的旋转变换, 降低了构建描述符的运算复杂性. 通过与OpenCV SIFT和Lowe SIFT进行多方面对比实验, 结果表明该方法的综合匹配速度具有显著提升, 在两幅图像存在一定程度的视点、模糊、旋转、比例、光照变化等情形下, 匹配性能有所增强.
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出版历程
  • 收稿日期:  2011-05-03
  • 修回日期:  2011-09-14
  • 刊出日期:  2012-09-20

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