In the paper,a vehicle body dimension measurement system based on binocular stereo vision technology is designed.Firstly,in the camera calibration and correction link,the camera model parameter solution and image correction are carried out using Zhang's calibration method and Bouguet algorithm,respectively,to eliminate the influence of subsequent measurement errors caused by image distortion.Secondly,combined with the background difference algorithm and the OTSU algorithm,high-precision segmentation and contour extraction are achieved for the target.Finally,the vehicle size measurement is completed by finding the smallest bounding rectangle and using the SGBM stereo matching algorithm to convert the two-dimensional data of the car body obtained after matching into three-dimensional data.The experiment results show that the overall measurement error of this system is within 6%,and the measurement of body size can be effectively completed.
Key words
binocular vision /
vehicle dimension measurement /
stereo correction /
SGBM stereo matching
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References
[1] 刘琦.道路交通安全管理研究[D].青岛:中国海洋大学, 2012.
[2] Hoegg T,Lefloch D,Kolb A.Time-of-Flight camera based 3D point cloud reconstruction of a car[J].Computers in Industry,2013, 64(9):1099-1114.
[3] 邢丽,张弘治,陈曦,等.基于双目视觉的薄壁零件变形量测量[J].光子学报,2020,49(7):14.
[4] 董鹏,周烽,赵悰悰,等.基于双目视觉的水下海参尺寸自动测量方法[J].计算机工程与应用,2021,57(8):8.
[5] Fang J,Xu S,Yang Y,et al.Localization and measurement method of continuous casting slab model based on binocular vision[J].Microwave and Optical Technology Letters,2019,62(12).
[6] 孙郑芬,吴韶波.机器视觉技术在工业智能化生产中的应用[J].物联网技术,2020,10(8):4.
[7] Zhang Z.A Flexible New Technique for Camera Calibration[J].IEEE Transactions on Pattern Analysis and Machine Intelligence,2000,22(11):1330-1334.
[8] Fusiello A,Trucco E,Verri A.A compact algorithm for rectification of stereo pairs[J].Machine Vision & Applications,2000,12(1):16-22.
[9] 刘波,王凌,金以慧.差分进化算法研究进展[J].控制与决策,2007,22(7):9.
[10] Otsu N.A Threshold Selection Method from Gray-Level Histograms[J].IEEE Transactions on Systems Man & Cybernetics,2007,9(1):62-66.
[11] 白明,庄严,王伟.双目立体匹配算法的研究与进展[J].控制与决策,2008,23(7):9.
[12] 王昕,马岩,杨剑,等. 区域立体匹配算法的实现及改进[J].光学精密工程,2008(10):2002-2008.
[13] H Hirschmüller.Stereo Processing by Semiglobal Matching and Mutual Information[J].IEEE Transactions on Pattern Analysis and Machine Intelligence,2008,30(2):328-341.
[14] Kim J,Kolmogorov V,Zabih R.Visual correspondence using energy minimization and mutual information[C]//Ninth IEEE International Conference on.IEEE,2003.
[15] Birchfield S, Tomasi C.A Pixel Dissimilarity Measure That Is Insensitive to Image Sampling[J].IEEE Transactions on Pattern Analysis & Machine Intelligence,1998,20(4):401-406.
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