Zheng Lina, Li Yanwei, Yuan Guoqin, Zhang Yang. Automatic focus plane detection of aerial remote camera based on Visibility[J]. Infrared and Laser Engineering, 2019, 48(4): 417001-0417001(6). doi: 10.3788/IRLA201948.0417001
| Citation:
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Zheng Lina, Li Yanwei, Yuan Guoqin, Zhang Yang. Automatic focus plane detection of aerial remote camera based on Visibility[J]. Infrared and Laser Engineering, 2019, 48(4): 417001-0417001(6). doi: 10.3788/IRLA201948.0417001
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Automatic focus plane detection of aerial remote camera based on Visibility
- 1.
Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;
- 2.
Jilin Wancheng Co. Ltd.,Changchun 130033,China
- Received Date: 2018-11-07
- Rev Recd Date:
2018-12-11
- Publish Date:
2019-04-25
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Abstract
In order to solve the problem of automatic focus plane detection in aerial remote camera, a new method of automatic focus plane detection for aerial remote camera used Visibility based on SFV technique was proposed. Firstly, in the process of focusing, spatial filtering characteristic of spatial slits was simulated by doing interval sample with linear CCD image, the best focus position was found by searching maxim Visibility value of SFV signal, through used relationship between SFV signal and the Visibility value. Secondly, spatial filtering velocimetry and relationship of Visibility and defocusing error was introduced, and experiment setup was designed. Lastly, for the typical image motion velocity between 5 mm/s to 53.2 mm/s, 20 times focal plane detection tests were taken, and the experiment results show that the focusing accuracy was higher than 46.25m, which was within the tolerant defocus(76.8m) and satisfies requirement of aerial remote camera.
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References
|
[1]
|
Aslantas V, Pham D T. Depth from automatic defocusing[J]. Optics Express, 2007, 15(3):1011-1023. |
|
[2]
|
Lin Huiyong, Chang Chiahong. Depth from motion and defocus blur[J]. Optical Engineering, 2006, 45(2):1-12. (in Chinese) |
|
[3]
|
Tian Yibin. Autofocus using image phase congruency[J]. Optics Express, 2011, 19(1):261-270. |
|
[4]
|
Xu Zhaolin, Zhao Yuliang, Zhang Guodong. Design of an auto-focusing system for a new type of aerial camera.[J]. Electronics Optics Control, 2011, 18(4):77-80. (in Chinese)许兆林, 赵育良, 张国栋. 新型航空相机自动调焦系统的设计[J]. 电光与控制, 2011, 18(4):77-80. |
|
[5]
|
Ator J T. Image-velocity sensing with parallel-slit reticles[J]. Journal of the Optical Society of America, 1963, 53(12):1416-1422. |
|
[6]
|
Christofori K, Michelt K. Velocimetry with spatial filters based on sensor arrays[J]. Flow Meas Instrum, 1996, 7(3-4):265-272. |
|
[7]
|
Martin Schaeper, Nils Damaschke. Velocity measurement for moving surfaces by using spatial filtering technique based on array detectors[C]//International Conference on Autonomous and Intelligent Systems AIS 2011, 2011, 6752:303-310. |
|
[8]
|
Jakobsen M L, Yura H T, Hanson S G. Speckles and their dynamics for structured target illumination:optical spatial filtering velocimetry[J]. Journal of Optics, 2009, 11(5):1464-4258. |
|
[9]
|
Mitsuhiro Ueda, Ryohei Nakayama. A new type of the spatial filter for detecting the sharpness of images[J]. Japanese Journal of Applied Physics, 1975, 14(12):2053-2062. |
|
[10]
|
Zheng Lina, Zhang Tao, Kuang Haipeng. Image motion velocity measurement technique based on spatial filtering effect of line CCD for aerial camera[J]. Acta Optica Sinica, 2012, 32(11):1112002. (in Chinese)郑丽娜, 张涛, 匡海鹏. 基于线阵CCD空间滤波效应的航空相机像移速度测量方法[J]. 光学学报, 2012, 32(11):1112002. |
|
[11]
|
Xu Zhaolin, Wang Shangqiang. Application of the image definition criterion function in aerial camera[J]. Electronics Optics Control, 2012, 19(7):57-61. (in Chinese)许兆林, 王尚强. 图像清晰度评价函数在航空相机中的应用[J]. 电光与控制, 2012, 19(7):57-61. |
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