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LIANG Hua-gang, CHENG Jia-le, SUN Xiao-nan, RU Feng. Time correction method of asynchronous cameras in road monitoring system[J]. Journal of Traffic and Transportation Engineering, 2015, 15(4): 118-126. doi: 10.19818/j.cnki.1671-1637.2015.04.015
Citation: LIANG Hua-gang, CHENG Jia-le, SUN Xiao-nan, RU Feng. Time correction method of asynchronous cameras in road monitoring system[J]. Journal of Traffic and Transportation Engineering, 2015, 15(4): 118-126. doi: 10.19818/j.cnki.1671-1637.2015.04.015
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Time correction method of asynchronous cameras in road monitoring system

doi: 10.19818/j.cnki.1671-1637.2015.04.015

  • School of Electronics and Control Engineering, Chang'an University, Xi'an 710064, Shaanxi, China

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  • Author Bio:

    LIANG Hua-gang(1980-), male, lecturer, PhD, +86-29-82334640, hgliang@chd.edu.cn

  • Received Date: 2015-02-13
  • Publish Date: 2015-08-25
    Abstract
  • In order to improve the reduction accuracy of traffic incident, a high accuracy time correction method of traffic scene 3Dreconstruction was proposed based on binocular epipolar geometry relationship.The frame sequences of multiple asynchronous cameras were analyzed, and the time correction model of asynchronous cameras was established.In order to correct the time error of multiple asynchronous cameras, corresponding frame time synchronous matching was carried out by using the epipolar geometry constraints and the constraint principle of minimum distance from point to pole line.The shooting system composed of 2asynchronous cameras was built, the time matching error of corresponding frame was analyzed.The time error of start frame in video sequences was estimated, and the recovery of high precision dynamic scenes was realized.High-speed moving vehicle was simulated by using flashing LED, and the range of time error was estimated.In order to further validate the effectiveness of the method in actual road environment, four cameras were used to shoot the video sequences of freefall ball, thecomparative tests were respectively carried out by using time correction method based on similarity discrimination and the proposed method.Test result indicates that when the exposure time of camera is 1/30 s, and the cycle of high-speed flashing light with is 6.59 ms, the time error range of start frame is from 0to 6.59 ms, the corresponding frames ratio is above 88.1%.Compared with the time correction method based on similarity discrimination, the proposed method performs well.Compared with the several traditional time correction methods, the accuracies of time error matching and the 3Dreconstruction of asynchronous cameras in road monitoring system are significantly improved.

     

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    • References(20)
  • [1]
    WEI Jun-cheng, WU Xing-xing, LIU Jin-guo, et al. Research on analysis and improvement of platform time synchronization errors of space camera[J]. Computer Measurement and Control, 2014, 22(4): 1294-1296. (in Chinese). doi: 10.3969/j.issn.1671-4598.2014.04.101
    [2]
    SHI Bo, LI Guo-yu, WANG Dong. A method for synchronized exposure of multi-CCD cameras in digital phtogrammetry and its experimental analysis[J]. Science of Surveying and Mapping, 2012, 37(5): 72-75. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-CHKD201205023.htm
    [3]
    CHEN Jian-hua, ZHANG Lei, RUAN Shan-fa. Synchronic exposure controller for non-metric cameras[J]. Journal of Nanjing University of Technolog: Natural Science Edition, 2003, 25(5): 92-94, 100. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-NHXB200305023.htm
    [4]
    LENG Xue, ZHANG Xue-fei, LI Wen-ming, et al. Image defect of full-frame CCD in TDI mode[J]. Optics and Precision Engineering, 2014, 22(2): 467-473. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-GXJM201402031.htm
    [5]
    LIN Hui, SHI Bo, ZHAO Qian, et al. Multi-camera synchronization exposure and GPS time correction processing[J]. Engineering of Surveying and Mapping, 2013, 22(2): 79-81. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-CHGC201302022.htm
    [6]
    PILLMAN B, JASINSKI D. Camera exposure determination based on a psychometric quality model[J]. Journal of Signal Processing Systems, 2011, 65(2): 147-158. doi: 10.1007/s11265-011-0612-z
    [7]
    SATO S, OKADA Y, AZUMA T. Real time high-sensitivity imaging for home surveillance system by using combined long/short exposure[C]∥IEEE. 2011International Conference on Digital Image Computing: Techniques and Applications. New York: IEEE, 2011: 429-435.
    [8]
    CHEN Rao-qing, CAO Guo, MAO Zhi-hong. Computation method of exposure time for space array CCD imaging[J]. Computer Engineering, 2012, 38(12): 1-4. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-JSJC201212003.htm
    [9]
    LI Jun-zheng, LI Jian-wen, HAO Jin-ming, et al. The time synchronization in the kinematic verification network for GPS receivers[J]. Journal of Geomatics Science and Technology, 2006, 23(6): 429-431. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-JFJC200606011.htm
    [10]
    DU Bao-qiang, LIU Dan, GUO Shu-ting, et al. High-resolution and wide-range time synchronization detection method based on time interval measurement[J]. Acta Electronica Sinica, 2013, 41(6): 1076-1083. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-DZXU201306007.htm
    [11]
    ZHOU Peng, PI Yi-ming, DAI Yong-shou, et al. Analysis of time synchronization errors in spaceborne/airborne hybrid bistatic SAR[J]. Acta Electronica Sinica, 2011, 39(6): 1467-1470. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-DZXU201106044.htm
    [12]
    LI Ying-huan. Design and implementation for synchronization precision detection system of the record of high-speed digital image[D]. Harbin: Harbin Institute of technology, 2013. (in Chinese).
    [13]
    LU Xing-jun, HAN Xian-zhong, CHEN Han, et al. Wheat spike image gray-binarization processing using improved G-component method[J]. Journal of Agricultural University of Hebei, 2012, 35(3): 112-116. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-CULT201203022.htm
    [14]
    LIU Hong. Graph-based near-duplicate video subsequence matching algorithm[J]. Application Research of Computers, 2013, 30(12): 3857-3862. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-JSYJ201312091.htm
    [15]
    GENG Ying-nan, ZHAO Yan, CHEN He-xin. Stereo video matching algorithm of belief propagation based on motion estimation[J]. Journal of Jilin University: Information Science Edition, 2010, 28(4): 329-333. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-CCYD201004002.htm
    [16]
    HACHAJ T, OGIELA M R. Real time area-based stereo matching algorithm for multimedia video devices[J]. Opto-Electronics Review, 2013, 21(4): 367-375.
    [17]
    WU Cheng-ke, YAN Yao-ping, LU Zhao-yang. Motion estimation and compensation based on epipolar geometry constraint[J]. Acta Electronica Sinica, 1998, 26(10): 66-69. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-DZXU199810013.htm
    [18]
    LI Li-chun, QIU Zhi-qiang, WANG Kun-peng, et al. 3D reconstruction based on fundamental matrix estimation weighted by match measure[J]. Computer Applications, 2007, 27(10): 2530-2533, 2537. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-JSJY200710057.htm
    [19]
    SHAN Hai-tao, HAO Xiang-yang, HA Chang-liang, et al. The derivation for relation between vision fundamental matrix and relative orientation element of photogrammetry[J]. Hydrographic Surveying and Charting, 2012, 32(1): 11-13. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-HYCH201201006.htm
    [20]
    DUAN Pi-xuan, CHENG Yao, HE Miao, et al. Development of a synchronous measurement system with NTP[J]. Computer Measurement and Control, 2013, 21(12): 3439-3440, 3443. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-JZCK201312089.htm
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