移轴原理的数字相机检校  

Digital camera calibrationin the principle of tilt-shift photography

作　　者：马经宇 方俊永 王潇 王建阳 

机构地区：[1]中国科学院大学,北京100049 [2]中国科学院遥感与数字地球研究所,北京100101

出　　处：《测绘科学》2018年第1期93-100,共8页Science of Surveying and Mapping

基　　金：国家高分辨率对地观测系统重大专项(50-H31D01-0508-13/15)

摘　　要：移轴相机由于其垂视摄影且视场可扩展的优势,已逐步开始应用于航空大面阵多相机系统中。针对当前航空移轴大面阵多相机系统未检校或由于检校精度不高导致几何精度较低的问题,提出了一种针对移轴成像的数字相机几何检校方法。该方法建立了移轴影像像平面坐标系到基准像平面坐标系的转换关系,并以此为基础构建移轴相机几何检校模型。本文以典型的单反移轴相机为例,利用室内三维检校场数据进行了实验验证与分析。结果表明,利用该方法对移轴相机进行检校是可靠的,并达到了较高的精度。Because of the advantages of vertical photography and the extension of view field, the camera is gradually applied in the aerial array multi-camera system. In view of the problem that the geometric accuracy is not high due to the low precision of the aerial imaging equipment, this paper presents a geometric calibration method for the digital camera based on the principle of tilt-shift photography. This method establishes the conversion relationship between the shift image plane coordinate system and the refer- ence plane coordinate system, and constructs the geometric calibration model of the tilt-shift camera. Taking a typical SLR camera as an example, this paper carries out experimental verification and analysis using the indoor 3d calibration field data. The results show that the method is reliable and high precision for the calibration of the camera.

关 键 词：移轴成像 相机检校 坐标系转换 空间后方交会 

分 类 号：P237[天文地球—摄影测量与遥感]