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遥感技术与应用  2015, Vol. 30 Issue (4): 725-730    DOI: 10.11873/j.issn.1004-0323.2015.4.0725
图像与数据处理     
基于ASIFT算法的低重叠度无人机影像拼接方法
宋耀鑫1,2,张丹丹1,唐伶俐1,李传荣1,马灵玲1
(1.中国科学院光电研究院定量遥感信息技术重点实验室,北京 100094;
2.中国科学院大学,北京 100049)
An Approach to Stitch UAV Image with Low Overlap based on ASIFT Algorithm
Song Yaoxin1,2,Zhang Dandan1,Tang Lingli1,Li Chuanrong1,Ma Lingling1
(1.Key Laboratory of Quantitative Remote Sensing Information Technology,Academy of
Opto\|Electronics,Chinese Academy of Sciences,Beijing 100094,China;
2.University of Chinese Academy of Sciences,Beijing 100049,China)
 全文: PDF(20236 KB)  
摘要:

在无人机平台上采用低重叠方式成像能够大大提高数据获取效率,可满足包括应急救援和航空侦察等时效性要求很高的特殊领域应用需求。然而,此类影像具有重叠度低和旋转角大的特点,利用常规正射影像镶嵌的方法进行拼接往往带来较大的拼接误差。提出了基于ASIFT算法的低重叠图像配准方法,并对序列影像做光束法平差处理,得到最优变换矩阵后,结合多分辨率样条融合算法进行全景影像输出。实验结果表明:该方法可以获取足够数量稳定的匹配点对,较好地约束了序列影像之间的几何关系,得到的拼接影像无缝清晰,适应于低重叠度无人机影像的快速拼接。

关键词: ASIFT算法低重叠度图像拼接无人机序列影像    
Abstract:

The efficiency of data acquisition can be greatly improved by imaging with low overlap in the UAV platform to meet the demands of the timeliness requirements for aerial reconnaissance and emergency rescue.However,the features that low overlap and serious rotation angle can bring greater errors with the conventional process of orthophoto mosaic.In this paper,an algorithm based on ASIFT with low overlap UAV image registration is proposed.Then the sparse bundle adjustment is used to constrain the space relationship of the sequence of images.A multi\|resolution spline mosaics technique with optimal transformation matrix of overlap images is presented.Experimental result shows that the proposed method can obtain a large number of stable correspondences and transformation matrix of overlap images for further seamless image stitching,which can be useful for low overlap UAV images stitching.

Key words: ASIFT    Low overlap    Image stitching    UAV    Sequential image
收稿日期: 2014-03-13 出版日期: 2015-09-22
:  TP 391.41  
基金资助:

国家863计划项目“遥感载荷性能与数据质量检测技术”(2013AA122102)。

通讯作者: 张丹丹(1984-),女,河南平顶山人,助理研究员,主要从事航空摄影测量方面的研究。Email:zhangdd@aoe.ac.cn。    
作者简介: 宋耀鑫(1988-),男,湖南衡阳人,硕士研究生,主要从事航空摄影测量和计算机视觉方面的研究。Email:RSyaoxin@163.com。
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引用本文:

宋耀鑫,张丹丹,唐伶俐,李传荣,马灵玲. 基于ASIFT算法的低重叠度无人机影像拼接方法[J]. 遥感技术与应用, 2015, 30(4): 725-730.

Song Yaoxin,Zhang Dandan,Tang Lingli,Li Chuanrong,Ma Lingling. An Approach to Stitch UAV Image with Low Overlap based on ASIFT Algorithm. Remote Sensing Technology and Application, 2015, 30(4): 725-730.

链接本文:

http://www.rsta.ac.cn/CN/10.11873/j.issn.1004-0323.2015.4.0725        http://www.rsta.ac.cn/CN/Y2015/V30/I4/725

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