为了对长焦距航空相机的离焦进行补偿,设计了一种基于自准直的离焦补偿系统。该系统首先采用高度自动化和智能化的光电自准直离焦补偿法实现离焦量的校正,然后通过引入飞机高度数据进行离焦量计算,并通过相应装置实现离焦校正。在校正过程中,采用效率更高的改进爬山算法进行准确焦面定位,利用FPGA硬件系统进行数据处理,并通过VHDL语言实现硬件功能。 In order to compensate the defocus of the long focal length aerial camera, a self-collimation defocus compensation system is designed. The system first uses a highly automated and intelligent photoelectric self-collimation defocus compensation method to achieve defocus correction, and then through the introduction of the aircraft height data for defocus calculation, and through the appropriate device to achieve defocus correction. In the process of calibration, the improved hill-climbing algorithm with higher efficiency is used to locate the accurate focal plane, the FPGA hardware system is used for data processing, and the hardware functions are realized by VHDL language.