宽角相机低空航测的精度分析

首先从理论上对低空航测精度与相机像场角的关系进行了定量分析，得出低空航测应尽可能使用宽角相机的结论；接着指明了单镜头相机扩大像场角的局限和现有市场上的组合宽角相机因重量过大而不适用于低空轻荷载无人机的不足，阐述了作者研制的具有自检校自稳定功能的组合宽角低空轻小型相机的特点，尤其是实现组合成像静态误差和动态误差自检校的技术原理；针对大比例尺测图的实践，提出通过宽角相机大重叠航空摄影提高低空航测精度的技术建议；最后用典型工程生产数据验证了上述理论分析的正确性。

Accuracy Analysis of Low Altitude Photogrammetry with WideGangle Camera

Abstract: Firstly, the relationship between the accuracy of low altitude aerial photogrammetry and the field angle of camera is made by a quantitative analysis from the theory. The conclusion that the low altitude photogrammetry should use wide-angle camera as much as possible is done. Then, the limitation of the single lens camera to expand field angle and the combined wide-angle camera existing on the market not suitable for light load of low altitude UAV(unmanned aerial vehicle) due to excessive weight are pointed out. The characteristics of combined wide-angle low altitude light camera with self-calibration and self-stabilization developed by the author are described, especially the principle of self-calibration for the combination of static error and dynamic error. Based on the practice of large scale mapping, a technical procedure in aerial photography by taking with wide-angle camera and large overlap simultaneously for improving the accuracy of low altitude photogrammetry is proposed. The typical engineering produced data is used to verity the above theoretical analysis.