论宽角航摄仪的精度、效率与成像质量

Discussion on accuracy,efficiency and imaging quality of wide angle aerial camera

针对影响航空摄影测量精度、作业效率和成像质量的各种因素,该文提出了内外方位元素可清晰分离的航摄仪检校场建设方法,实现了航摄仪内方位元素的高精度检校。以此为基础,设计和实践了一种满足现有航测生产要求的高性能宽角航摄仪,该设备具有旁向视场角超过80°、稳定曝光频率2Hz、自动感知飞行速度和地形高、依摄影测量规则自动决定曝光间隔等能力。数万平方千米的生产实践表明:宽角航摄仪影像色彩自然,全局纹理清晰,支持在大速高比环境下航空摄影,其综合作业效率超过当今国际品牌航摄仪2倍以上。

According to the factors that affect the precision,working efficiency and imaging quality of aerial photogrammetry,a method of building the calibration field for unwinding the inner and outer azimuth elements of aerial camera was proposed in this paper,and the high precision calibration of the interior orientation elements of the aerial camera was realized.On this basis,the design and practice of a kind of meet the requirements of the existing photogrammetry production of high-performance wide angle aerial camera,the device has the capability of more than 80°transverse field of view,stable exposure frequency of 2 Hz,automatic sensing of flight speed and terrain height,and automatic determination of exposure interval according to photogrammetry's rules.The production practice of tens of thousands of square kilometers showed that the color of wide-angle aerial camera's image was natural,the overall texture was clear,it supported aerial photography in the environment of large speed high ratio,and its integrated operational efficiency was more than twice that of the international brand aerial camera today.