Aerial camera image focusing method based on out-of-phase differential filtering effect

doi:10.3788/IRLA20200432

CIOMP OpenIR

	Aerial camera image focusing method based on out-of-phase differential filtering effect
	Q. Kang; L. Zheng and H. Wang
	2021
发表期刊	Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
ISSN	10072276
卷号	50 期号:8
摘要	Aiming at the problem of aerial camera focal plane detection, an aerial camera focal plane detection method based on out-of-phase difference filter was proposed. Firstly, the principle of automatic focus detection by spatial filtering effect was introduced. Secondly, the out-of-phase differential detection algorithm was used to design out-of-phase differential filters in order to eliminate the fundamental frequency components in the spatially filtered signal, increased the signal-to-noise ratio and amplitude, and improved the focus accuracy. The frequency spectrum of the out-of-phase differential filter's output signal was analyzed. Finally, guide rail speed between 5-53.2 mm/s according to the typical speed-to-height ratio was set to perform 25 image plane inspections, and the focusing effects of traditional image focusing operators was compared with differential filtering methods. The results show that the differential filter focusing method has strong scene adaptability and high sensitivity, and the maximum error of the focusing system is 45.18 m, which is less than the allowable error of the optical system of 76.8 m and meets the engineering requirements. 2021, Editorial Board of Journal of Infrared and Laser Engineering. All right reserved.
DOI	10.3788/IRLA20200432
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收录类别	EI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/65034
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	Q. Kang,L. Zheng and H. Wang. Aerial camera image focusing method based on out-of-phase differential filtering effect[J]. Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering,2021,50(8).
APA	Q. Kang,&L. Zheng and H. Wang.(2021).Aerial camera image focusing method based on out-of-phase differential filtering effect.Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering,50(8).
MLA	Q. Kang,et al."Aerial camera image focusing method based on out-of-phase differential filtering effect".Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering 50.8(2021).

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