Autocollimation location system of aerial camera lens- focus plane based on image processing technology
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摘要: 提出基于图像处理技术的航空相机镜头焦面定位的方法，利用光电自准直原理进行焦面定位，并选用两种图像清晰度评价函数实时提取图像清晰度特征，采用优化的爬山算法进行快速检焦。仿真实验结果表明：利用本系统对焦距为750 mm,F数为6.3，CCD像元尺寸为6.8 m6.8 m，成像光谱为500 nm~800 nm的航空相机进行焦面定位精度测定，得到相机的半焦深为0.040 mm，可用于航空CCD相机的焦面检定及航空CCD相机的自动调焦系统。Abstract: A measuring method of aerial camera lens- focus plane is presented, which locates focus plane using autocollimation theory. The system chooses two kinds of image definition evaluation function to extract the characteristics of image definition, and detects focus plane quickly using hill-climbing algorithm. Simulation experiment result proves that measuring and calibrating the focus plane of aerial camera using the autocollimation measuring system is characterized by high precision, high speed and good real-time performance, and has little influence by the artificial factors. The system is adapted for the focus plane calibration and auto-focusing system of aerial CCD camera.
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［1］惠守文. 长焦距斜视实时航空相机离焦补偿［J］. 光学精密工程，2003,11(2):162-165.
XI Shou-wen. Compensation for long focus oblique real-time aerial camera being out of focus［J］.Optics and Precision Engineering，2003,11(2):162-165.(in Chinese with an English abstract)
［2］王勇，谭毅华，田金文.一种新的图像清晰度评价函数［J］.武汉理工大学学报，2007,29(3):124-126.
WANG Yong,TAN Yi-hua,TIAN Jin-wen.A new kind of sharpness-evaluation-function of image［J］.Journal of Wuhan University of Technology, 2007,29(3):124-126. (in Chinese with an English abstract)
［3］杨国光.近代光学测试技术［M］.杭州:浙江大学出版社,1997.
YANG Guo-guang.Optical measuring technology［M］.Hangzhou: Zhejiang University Press,1977.(in Chinese)
［4］王学影，张洪涛.基于图像处理的CCD摄象机自动调焦方法的研究［J］.计量技术，2005(8):16-18.
WANG Xue-ying,ZHANG Hong-tao.Study of automatic focusing adjustment using CCD-based digital image processing method［J］.Metrology Technology, 2005(8):16-18. (in Chinese with an English abstract)
［5］冈萨雷斯.数字图像处理［M］.阮秋琦,阮宇智，译.北京:电子工业出版社，2005.
RAFAEL G C. Digital image processing［J］.Translated by Ruan Qiu-ping,RUAN Yu-zhi.Beijing:Pubushing House of Electronics Insdustry,2005.(in Chinese)
［6］赵育良，许兆林. 基于CCD的微缝宽激光测量系统的改进［J］.红外与激光工程，2006,35 (1):75-78.
ZHAO Yu-liang,XU Zhao-lin.Amelioration and precision improving of slit width measurement system based on the orthogonal linear CCD［J］. Infrared and Laser Engineering,2006,35 (1):75-78.(in Chinese with an English abstract)
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