利用单应约束实现结构化场景的匹配扩展

翟优; 熊伟; 曾峦

doi:10.3788/OPE.20152313.0466

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利用单应约束实现结构化场景的匹配扩展

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- 利用单应约束实现结构化场景的匹配扩展
- Matching extension for structured scenes based on homography constraint
- 光学精密工程 2015年23卷第10z期页码：466-471
- 作者机构：
  
  中国人民解放军装备学院北京,101416
- 作者简介：
- 基金信息：
  
  省部级试验技术研究项目(No.411413903)()
- DOI：10.3788/OPE.20152313.0466
  中图分类号： TP751
- 收稿日期：2015-04-10，
  
  修回日期：2015-05-05，
  
  纸质出版日期：2015-11-14
- 稿件说明：
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翟优, 熊伟, 曾峦. 利用单应约束实现结构化场景的匹配扩展[J]. 光学精密工程, 2015,23(10z): 466-471

ZHAI You, XIONG Wei, ZENG Luan. Matching extension for structured scenes based on homography constraint[J]. Editorial Office of Optics and Precision Engineering, 2015,23(10z): 466-471
翟优, 熊伟, 曾峦. 利用单应约束实现结构化场景的匹配扩展[J]. 光学精密工程, 2015,23(10z): 466-471 DOI： 10.3788/OPE.20152313.0466.

ZHAI You, XIONG Wei, ZENG Luan. Matching extension for structured scenes based on homography constraint[J]. Editorial Office of Optics and Precision Engineering, 2015,23(10z): 466-471 DOI： 10.3788/OPE.20152313.0466.

摘要

针对结构化场景图像纹理单一

宽基线情况下基于局部特征的匹配方法能够获取的匹配较少的问题

提出了一种基于初始匹配的匹配扩展方法。首先

依据单应约束将初始匹配划分为多个子类

每个子类对应于不同的局部平面

并采用RANSAC算法估计每个子类的单应矩阵

剔除不符合平面约束的外点。然后

依据平面单应搜索未匹配特征点的候选匹配以及改进8扇区SURF描述符的相似性剔除错误匹配。最后

在扩展后的匹配集合中更新单应估计

并剔除外点

实现匹配扩展。实验结果表明:当图像存在一定的尺度和视点变化以及明显的光照变化时

该方法能够有效地增加匹配的数目

匹配增长率均在100%以上

可为精确的极线几何估计和三维重建奠定良好的基础。

Abstract

Structured scenes have uniform texture and the matching method based on local features can get few matches in a wide baseline case. Therefore

a matching extension method based on homography constraint was presented. Firstly

initial matches were divided into several groups and each group was corresponded to different planes based on the homography constraints. The homography matrix for each group was estimated using RANSAC based strategy and the outliers out of the plane constraint were removed. Then

the nearest candidate correspondences for unmatched features such as corners and blobs were searched by homography transformation and the SURF descriptor was used to further reject outliers. Furthermore

the homography constraints were updated using extended matches and outliers are removed. Experiment results show that the proposed method can adapt to a certain degree of scale and viewpoint changes and obviously illumination change. The initial matches are greatly enriched

and matching growth rates all achieve to 100%

which lays a good foundation for accurate epipolar geometry estimation and three dimensional reconstruction.

关键词

Keywords

references

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翟优, 曾峦, 熊伟. 不同局部邻域划分加速鲁棒特征描述符的性能分析[J]. 光学精密工程, 2013, 21(9):2395-2404. ZENG Y, ZENG L, XIONG W. Performance analysis of SURF descriptor with different local region partition[J]. Opt. Precision Eng., 2013, 21(9):2395-2404.

翟优, 熊伟, 曾峦. 利用直线交点特征实现宽基线匹配.(外审) ZENG Y, XIONG W, ZENG L. Wide-baseline Matching Based on Line Intersection Features.(Under review)

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