五镜头倾斜状态下航空摄影测量的应对策略
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摘要
该文通过分析五镜头倾斜航空摄影时,镜头相对位置,下视侧视相机的焦距选择,所摄影像分辨率平台检校,实际航空摄影时航摄时间、航高、分辨率、航摄分区设计、影像重叠度、航线、分区覆盖设计、航摄成果精度评定等方面的内容,结合实际经验及实验总结出侧视相机焦距越长,视场角越小,获取的影像纹理越多;不测图仅生产实景三维影像时,倾斜摄影旋偏角及影像重叠度适当放宽,下视满足空三加密要求,侧视影像能够提取影像纹理即可;精度要求较高时,则需要严格按照规范执行。
In this paper,through analyzing the relative position of lens,focal length selection of down view camera and side view camera,and calibration platform of photo resolution of the tilt aerial photogrammetry of five-lens,and the aerial photography time,flying height,resolution,aerial partition design,image overlapping degree,route,design of partition covering,accuracy evaluation of aerial result of actual aerial photogrammetry,combined with the practical experience and experiments,it summarizes that the longer of the focal length of side view camera,the smaller of the field angle,the more image textures can be obtained; When unmeasures graph,and only produces the real 3 D images,the oblique angle and the overlap degree of the image can be appropriately relaxed,the down view can meet the three-dimensional encryption requirements,and the image texture can be extracted by side view image; when high accuracy requires,it need accord to the specifications strictly.
In this paper,through analyzing the relative position of lens,focal length selection of down view camera and side view camera,and calibration platform of photo resolution of the tilt aerial photogrammetry of five-lens,and the aerial photography time,flying height,resolution,aerial partition design,image overlapping degree,route,design of partition covering,accuracy evaluation of aerial result of actual aerial photogrammetry,combined with the practical experience and experiments,it summarizes that the longer of the focal length of side view camera,the smaller of the field angle,the more image textures can be obtained; When unmeasures graph,and only produces the real 3 D images,the oblique angle and the overlap degree of the image can be appropriately relaxed,the down view can meet the three-dimensional encryption requirements,and the image texture can be extracted by side view image; when high accuracy requires,it need accord to the specifications strictly.
引文
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[2]桂德竹,林宗坚,张成成.倾斜航空影像的城市建筑物三维模型构建研究.测绘科学,2012,37(4):140~142
[3]黄健,王继.多视角影像自动化实景三维建模的生产与应用.测绘通报,2016,(4):75~78
[4]刘力荣,左建章,岳贵杰.SWDC-5倾斜摄影建筑物纹理自动映射方法.测绘科学,2015,(40):68~71
[5]李学友,倪忠礼.IMU/DGPS辅助航空摄影测量中检校场布设方案研究.测绘工程,2005,14(4):14~18
[6]李德仁,肖雄武,郭炳轩,等.倾斜航空影像自动空三机及其在城市真三维模型重建中的应用.武汉大学学报(信息科学版),2016,41(6):711~721
[7]吴文坛,田挚,李哲,等.河北CORS在大比例尺倾斜航空摄影测量中的应用.测绘通报,2013,(2):63~66
[8]洪亮,王海涛,曹金山,等.框幅式数字航空摄影成果质量检验方案.武汉大学学报(信息科学版),2013,38(10):1172~1174
[9]赵有松,尹栗,张莉,等.航空遥感影像质量评价方法探讨.测绘科学,2016,41(1):158~162