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

doi:10.3788/IRLA20200432

CORC > 长春光学精密机械与物理研究所 > 中国科学院长春光学精密机械与物理研究所

	Aerial camera image focusing method based on out-of-phase differential filtering effect
	Q. Kang; L. Zheng and H. Wang
刊名	Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
	2021
卷号	50 期号:8
ISSN号	10072276
DOI	10.3788/IRLA20200432
英文摘要	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.
URL标识	查看原文
内容类型	期刊论文
源URL	[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).