影像倾斜度对ASIFT匹配有效性的影响  

Effect of Image Tilt Measure on ASIFT Matching Validity

作　　者：张振超[1] 戴晨光[1] 莫德林[1] 赵明衍[1] 

机构地区：[1]信息工程大学,河南郑州450001

出　　处：《测绘科学技术学报》2014年第5期514-518,共5页Journal of Geomatics Science and Technology

基　　金：国家863计划项目(2012AA12A302-5)

摘　　要：相比传统垂直摄影模式,倾斜摄影更符合人眼直观感受,且能提供更加丰富的三维信息,因而在测绘领域越来越受到重视。对比分析了国内外主要倾斜数字相机的性能参数,归纳了倾斜摄影测量作业的一般数据结构、成像规律。为衡量单张航摄倾斜影像的绝对倾斜程度或是两张倾斜影像之间的倾斜差异,引入了倾斜度概念。通过不同倾斜度条件下的ASIFT匹配实验,研究分析倾斜度变化对于匹配有效性的影响,验证了倾斜度计算方法的合理性。Compared to conventional vertical photogrammetry, the intuitive images and rich 3D information can be provided by the oblique photogrammetry which thus attracts more and more attention in the field of surveying and mapping. The performance parameters of the main digital oblique cameras at home and abroad were compared and general data structure and imaging rule in the oblique photogrammetric workflow were summarized. To measure the absolute tilt of a single oblique image or transition tilt of two oblique images, the tilt measure was introduced here. ASIFT matching was conducted between two images under a variety of tilt levels to research the influence of tilt measure on matching validity. The result verifies the tilt measure calculating method is reasonable.

关 键 词：倾斜摄影测量 数据结构 倾斜度 ASIFT匹配算法 匹配有效性 

分 类 号：P237[天文地球—摄影测量与遥感]