XIA Hu-pei, SU Xin-yan, LIU Pei-zhen, LIU Bin
(Shanxi Key Laboratory of Signal Capturing & Processing, North University of China, Taiyuan 030051, China)
Abstract： Because single line-scan camera loses light in the edge of the sensor when the field of view is large, a mosaic camera based on field programmable gate array (FPGA) is presented by putting multiple cameras arranged in a straight line to share the field of view and reduce the view angle of every camera. For detecting doping micro particles with the designed mosaic line-scan camera, a detection algorithm of the target’s location in FPGA is proposed. Finally, the practicability and stability of the system were validated experimentally. The results of the experiment show that the camera can get images clearly with less light loss and can accurately distinguish the target and the background.
Key words： large field of view; line-scan camera; field programmable gate array (FPGA); threshold segmentation
CLD number： TP273 Document code： A
Article ID： 1674-8042(2014)04-0057-05 doi： 10.3969/j.issn.1674-8042.2014.04.011
References
[1] YU Xiao-lei, ZHAO Zhi-min, CHEN yuan, et al. On-line nep detection used in carding machine based on machine vision. Transducer and Microsystem Technologies, 2008, 27(7): 96-98.
[2] CHEN Ping, LI Yi-hong. Automatic detection system of small objects falling based on linear CCD. Manufacturing Automation, 2013, 35(2): 45-49.
[3] BIE Jun-feng, YE Yu-tang, LIU Lin, et al. A new method of high-precision and real-time splicing based on the multi-line array CCD camera’s large format scanner. Chinese Journal of Electron Devices, 2013, 36(1): 44-48.
[4] ZHANG Ming-yu, LIU Jin-guo, LI Yu, et al. Binocular CMOS APS image system based on camera link interface. Optoelectronic Technology, 2008, 28(4): 270-273.
[5] JIN Yi, ZHAI Chao, XING Xiao-zheng, et al. Modeling and simulation of LAMOST focal plane observation planning. Acta Metrologica Sinica, 2007, 28(4): 306-310.
[6] GUAN Che, WANG Yan-jie. Real-time auto light control system of CCD camera. Optics and Precision Engineering, 2008, 16(2): 358-366.
[7] ZHU Jun-chao, LIU Tie-gen, LIU De-rui, et al. Linear CCD gray-scale distribution real-time calibration method. Opto-Electronic Engineering, 2007, 34(12): 108-112.
基于FPGA的拼接式线阵相机设计
夏湖培， 苏新彦， 刘培珍， 刘宾
(中北大学 信息探测与处理山西省重点实验室， 山西 太原 030051）
摘要:针对单线阵相机在大视场下传感器边缘的失光问题， 设计了基于FPGA的拼接式线阵相机。 采用将多个相机直线排列的方法， 对视场进行分担， 减小了单个相机的视场角。 在检测微小颗粒掉落的应用中， 在FPGA内部设计了目标位置的检测算法， 并通过实验验证了系统的实用性和稳定性。 实验结果表明， 相机成像清晰， 边缘失光较小， 可准确区分目标和背景。
关键词:大视场； 线阵相机； FPGA； 阈值分割
引用格式：XIA Hu-pei, SU Xin-yan, LIU Pei-zhen, et al. Mosaic line-scan camera based on FPGA. Journal of Measurement Science and Instrumentation, 2014, 5(4): 57-61. [doi: 10.3969/j.issn.1674-8042.2014.04.011]
[full text view]
