嵌入式在线航空摄影测量方法

摘要

In order to meet the demand of real-time spatial data processing and improve the online processing capability of photogrammetric system,a kind of online photogrammetry method is proposed.According to the proposed method,system based on embedded architecture is then designed.Online photogrammetric data processing is realized by using FPGA(Field Programmable Gate Array),ARM+DSP(Advanced RISC Machine coupled with Digit Signal Processor)and other embedded computing technologies to build specialized hardware operating environment as well as transplanting and optimizing the existing photogrammetric algorithm to the embedded system.Aerial photogrammetric experiment shows that the method can achieve high-speed and stable online processing of photogrammetric data.And the experiment also verifies the feasibility of the proposed online photogrammetric system based on embedded architecture,which can improve the processing the efficiency of photogrammetry to a higher level and broaden the application field of photogrammetry.%为满足空间数据实时处理的需求，提高航空摄影测量系统在线处理能力，研究一种在线摄影测量的理论与方法，运用嵌入式架构设计一种在线摄影测量系统，使用可编程门阵列（FPGA）方法、高级精简指令集机器组合数字信号处理器（ARM＋DSP）方法等嵌入式计算技术建立专门的硬件运行环境，移植并优化现有算法到嵌入式系统中，实现摄影测量数据的在线处理。机载航摄实验结果表明，该方法能够实现对摄影测量数据进行快速稳定的在线处理，验证了运用嵌入式架构的在线摄影测量的可行性，把摄影测量的处理效率提高到了一个更高的水平，同时也进一步拓宽了摄影测量技术的应用领域。