摘要
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。
An autocollimation-based defocusing compensation system is designed for an aerial long focal length camera.In the system,a high automation and high intelligence optoelectronic autocollimation defocusing compensation method is firstly used to correct the defocusing distance;then,the data about the altitude of an aircraft is incorporated to calculate the defocusing distance;and finally,a related device is used to implement defocusing compensation.In the defocusing compensation process,a modified hill-climbing algorithm is used to locate the focal surface accurately.A FPGA hardware system is used for data processing and its hardware function is realized by using the VHDL language.
出处
《红外》
CAS
2011年第2期5-8,23,共5页
Infrared
基金
国家863计划项目(2006AA0619)
关键词
离焦补偿
航空相机
自准直
动态可编程硬件
爬山算法
defocusing compensation
aerial camera
autocollimation
FPGA
hill-climbing algorithm
