单镜头大视场拼接系统成像分析与控制设计
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摘要
为了满足远距离目标捕获的需求,提出了一种单镜头大视场拼接成像方法,设计了实验样机对其进行验证,对样机的成像特性进行了分析。介绍了样机的结构设计和相机曝光控制流程,然后根据该成像方法通过控制相机连续圆锥旋转实现大视场成像的特点,分析了样机成像的像移特性及样机结构运动精度对子图像正确拼接的影响,最后设计了在样机运转过程中使相机准确对子视场曝光的控制参数。实验中将样机参数代入分析结果进行了计算,得出了成像的像移大小,并对由相机运动误差导致的子图像拼接偏差进行了校核。计算得出了相机的曝光控制参数,最终获得了拼接正确的大视场图像。通过对实验样机的成像特点进行分析,为该单镜头大视场拼接方法在激光对抗系统中的工程应用奠定了基础。
A large field of view stitching method with a single lens was proposed to meet the requirement of remote target capture. An experimental prototype was designed to verify the method,and the imaging characteristics of the prototype were analyzed. The structural design of the prototype and the camera exposure control process were introduced. Then according to the imaging method, by controlling the continuous conic rotation of the camera to realize large-field imaging, the image motion feather of the prototype and the influence of the motion tolerance on the correct splicing of the sub-images were analyzed. At last the control parameters were designed to make the camera expose to the proper field when the prototype was in running. In the experiment, the parameters of the prototype were substituted into the analysis results, the image motion value was obtained by calculation, and the stitching deviation of the sub-images caused by the camera motion error was checked. Finally the large field image that was stitched correctly was obtained according to the camera exposure control parameters obtained by calculation. The imaging characteristics of the experimental prototype were analyzed, which laid the foundation for engineering application of the large-field stitching method.
A large field of view stitching method with a single lens was proposed to meet the requirement of remote target capture. An experimental prototype was designed to verify the method,and the imaging characteristics of the prototype were analyzed. The structural design of the prototype and the camera exposure control process were introduced. Then according to the imaging method, by controlling the continuous conic rotation of the camera to realize large-field imaging, the image motion feather of the prototype and the influence of the motion tolerance on the correct splicing of the sub-images were analyzed. At last the control parameters were designed to make the camera expose to the proper field when the prototype was in running. In the experiment, the parameters of the prototype were substituted into the analysis results, the image motion value was obtained by calculation, and the stitching deviation of the sub-images caused by the camera motion error was checked. Finally the large field image that was stitched correctly was obtained according to the camera exposure control parameters obtained by calculation. The imaging characteristics of the experimental prototype were analyzed, which laid the foundation for engineering application of the large-field stitching method.
引文
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[11] Mao Bonian, Meng Xin, Bian Chunjiang, et al. Servo control system in two-dimensional coupled optics swing mirror[J]. Infrared and Laser Engineering, 2015,44(2):544-548.(in Chinese)毛博年,孟新,卞春江,等.二维耦合光学摆镜伺服控制系统[J].红外与激光工程, 2015, 44(2):544-548.
[12] National Standardization Technical Committee. GB/T307.1—2005. Quantities and units[S]. Beijing:China Standard Press, 2005.(in Chinese)
[13] Yang Wei, Fu Yaowen, Pan Xiaogang, et al. Trackbefore-detect technique for dim targets:an overview[J]. Acta Electronica Sinica, 2014, 42(9):1786-1793.(in Chinese)杨威,付耀文,潘晓刚,等.弱目标检测前跟踪技术研究综述[J].电子学报, 2014, 42(9):1786-1793.
[14] Jin Zefenfen, Hou Zhiqiang, Yu Wangsheng, et al.Multiple feature fusion based on covariance matrix for visual tracking[J]. Acta Optical Sinica, 2017, 37(9):0915005.(in Chinese)金泽芬芬,侯志强,余旺盛,等.基于协方差矩阵的多特征融合跟踪算法[J].光学学报, 2017, 37(9):0915005.
[2] Pollock D B, Reardon P J, Rogers T E, et al. Multilens array system and method:U.S., 9182228[P]. 2015-11-10.
[3] Lu Yu. Research on the key technology of large field of view and ultra-high resolution camera[D]. Heifei:University of Science and Technology of China, 2016.(in Chinese)卢钰.大视场超高像素相机关键技术研究[D].合肥:中国科学技术大学, 2016.
[4] Liu Hao, Wei Zhiqiang, Li Zhen, et al. The research and implementation of a multi-camera system[J].Periodical of Ocean University of China, 2015, 45(3):128-135.(in Chinese)刘昊,魏志强,李臻,等.一种多相机系统的研究与实现[J].中国海洋大学学报(自然科学版), 2015, 45(3):128-135.
[5] San X, Qiao Y, Yu S, et al. Optimization design and simulation analysis for the key components of 1m aperture photoelectric theodolite[C]//International Symposium on Advanced Optical Manufacturing and Testing Technologies. International Society for Optics and Photonics, 2014:92800K.
[6] Sargent R, Bartley C, Dille P, et al. Timelapse GigaPan:capturing, sharing, and exploring timelapse gigapixel imagery[C]//Fine International Conference on Gigapixel Imaging for Science, 2010.
[7] Yu Yang, Wang Shiyong, Jian Yi, et al. Realization of an optical system based on continuous-scan focal plane array[J]. Infrared and Laser Engineering, 2016, 45(1):0118002.(in Chinese)于洋,王世勇,蹇毅,等.面阵探测器连续扫描成像光学系统[J].红外与激光工程, 2016, 45(1):0118002.
[8] Lin Sen, Cai Wei, Wei Xiaolin, et al. Design of image space scanning system with tilt mirror for cooled medium wave infrared optical system[J]. Journal of Astronautic Metrology and Measurement, 2017, 37(4):16-19, 65.(in Chinese)林森,蔡伟,魏小林,等.带摆镜的制冷型中波红外像方扫描光学系统设计[J].宇航计测技术, 2017, 37(4):16-19,65.
[9] Wang Min. Use PID mathematic arithmetic to control motor[J]. Modern Electronics Technique, 2005(4):82-84.(in Chinese)王敏.扫描摆镜控制的数字PID实现[J].现代电子技术,2005(4):82-84.
[10] Yuan Ye, Qiu Jun, Wang Zhilei, et al. Study on design of scanning mirror system for area array imaging[J].Aerospace Shanghai, 2016, 33(6):72-77.(in Chinese)袁野,裘俊,王智磊,等.结合面阵成像的摆镜扫描系统设计研究[J].上海航天, 2016, 33(6):72-77.
[11] Mao Bonian, Meng Xin, Bian Chunjiang, et al. Servo control system in two-dimensional coupled optics swing mirror[J]. Infrared and Laser Engineering, 2015,44(2):544-548.(in Chinese)毛博年,孟新,卞春江,等.二维耦合光学摆镜伺服控制系统[J].红外与激光工程, 2015, 44(2):544-548.
[12] National Standardization Technical Committee. GB/T307.1—2005. Quantities and units[S]. Beijing:China Standard Press, 2005.(in Chinese)
[13] Yang Wei, Fu Yaowen, Pan Xiaogang, et al. Trackbefore-detect technique for dim targets:an overview[J]. Acta Electronica Sinica, 2014, 42(9):1786-1793.(in Chinese)杨威,付耀文,潘晓刚,等.弱目标检测前跟踪技术研究综述[J].电子学报, 2014, 42(9):1786-1793.
[14] Jin Zefenfen, Hou Zhiqiang, Yu Wangsheng, et al.Multiple feature fusion based on covariance matrix for visual tracking[J]. Acta Optical Sinica, 2017, 37(9):0915005.(in Chinese)金泽芬芬,侯志强,余旺盛,等.基于协方差矩阵的多特征融合跟踪算法[J].光学学报, 2017, 37(9):0915005.
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