| 引用本文: | 雷琳,陈涛,李智勇,等.全局仿射变换条件下图像不变量提取新方法.[J].国防科技大学学报,2008,30(4):64-70.[点击复制] |
| LEI Lin,CHEN Tao,LI Zhiyong,et al.A New Approach to Image Invariant Extraction under Global Affine Transformation[J].Journal of National University of Defense Technology,2008,30(4):64-70[点击复制] |
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| 全局仿射变换条件下图像不变量提取新方法 |
| 雷琳1, 陈涛2, 李智勇1, 粟毅1 |
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(1.国防科技大学 电子科学与工程学院，湖南 长沙 410073;2.空军第六研究所，北京 100085)
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| 摘要: |
| 从仿射几何理论出发，提出了一种全局仿射变换条件下图像特征不变量构造的新方法。利用仿射区域划分获取一组扩展质心集合作为图像特征点集；求解特征点集的凸包，根据扩展质心的性质将凸包顶点均匀组合成若干特征区域；利用仿射几何性质构造了有效的仿射不变量。实验对该方法进行了全面的比较分析，以验证所构造的不变量更具稳定性和高时效性。 |
| 关键词: 仿射不变量 扩展质心 凸包 仿射变换 目标识别 |
| DOI： |
| 投稿日期：2008-02-18 |
| 基金项目:国家部委资助项目(513220206) |
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| A New Approach to Image Invariant Extraction under Global Affine Transformation |
| LEI Lin1, CHEN Tao2, LI Zhiyong1, SU Yi1 |
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(1.College of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China;2.The Sixth Research Institute of Air Force, Beijing 100085, China)
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| Abstract: |
| Based on the affine geometry theory, a new method for image invariant construction is proposed under the global affine transformation condition. At first, the image feature points are obtained by affine region cutting. Secondly, the convex hull of feature points is established, and then the vertices of the convex hull are well proportionally combined into some feature regions. At last, we use these feature regions to construct affine invariants, based on affine geometry invariant property. In order to validate the image invariant's stability and high time efficiency, experiments were performed and the proposed method was analyzed in comparison with the existent methods. |
| Keywords: affine invariant extended centroid convex hull affine transformation target recognition |
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