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一种颜色仿射变换下的局部特征描述子 被引量：15

A Local Feature Descriptor under Color Affine Transformation
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摘要 提出一种颜色仿射变换下局部特征的描述子,它分别处理特征点邻域内每个像素的RGB 3个颜色通道,并利用仿射不变量计算每个颜色通道的仿射梯度;为控制特征点处描述子的维数,根据邻域内像素到特征点的距离和相对特征点主方向的角度对特征点邻域内的仿射梯度进行累加,构成局部特征点的特征描述子.所提出的特征描述子增强了特征点对光度变化和仿射变换的不变性,提高了图像局部特征匹配的准确度;并通过一组典型图像的特征点匹配实验验证了其有效性. A new local feature’s affine gradient descriptor（AGDES） is presented. It handles each color channel of every pixel in local features’ neighborhood, and computes affine gradient for each channel. In order to control the dimensions of descriptors, local features are described by accumulating their affine gradient of different directions and distances to the feature points. The new descriptor is more robust to photometric changes and color affine transformation, and can improve the matching precision. Extensive experimental results have demonstrated the effectiveness and efficiency of the proposed algorithm.
作者 葛娟 曹伟国 周炜 公明 刘浏 李华
机构地区 中国科学院计算技术研究所集成应用中心 中国科学院研究生院
出处 《计算机辅助设计与图形学学报》 EI CSCD 北大核心 2013年第1期26-33,共8页 Journal of Computer-Aided Design & Computer Graphics
基金 国家"八六三"高技术研究发展计划(2007AA01Z317) 国家自然科学基金(60873164)
关键词 局部特征 特征描述 光照变化 颜色仿射变换 图像匹配 local feature feature description illumination change color affine transformation image matching
分类号 TP391 [自动化与计算机技术—计算机应用技术]
  • 相关文献

参考文献27

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二级参考文献34

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共引文献40

同被引文献181

  • 1明德烈,柳健,田金文.仿射变换在增强现实中的应用[J].系统仿真学报,2001,13(S2):286-289. 被引量：8
  • 2罗钟铉,刘成明.灰度图像匹配的快速算法[J].计算机辅助设计与图形学学报,2005,17(5):966-970. 被引量：72
  • 3赵文彬,张艳宁.角点检测技术综述[J].计算机应用研究,2006,23(10):17-19. 被引量：83
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引证文献15

二级引证文献111

计算机辅助设计与图形学学报
2013年 第1期

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