计算机科学 ›› 2018, Vol. 45 ›› Issue (7): 226-229.doi: 10.11896/j.issn.1002-137X.2018.07.039
胡燕花,唐鹏,金炜东,何正伟
HU Yan-hua ,TANG Peng ,JIN Wei-dong, HE Zheng-wei
摘要: 在结构化场景的轨道交通中,车载视频观测因相机平移运动而呈现出图像内容以某点为中心向四周扩散的现象,该点被称为FOE (Focus of Expansion)。当前计算FOE的算法对噪声敏感且计算量大,不能准确地计算铁路场景中的FOE。鉴于此,文中提出一种铁路视频序列的FOE估计方法。该方法首先利用金字塔光流法对检测的Harris角点进行跟踪和粗匹配,并在此基础上利用RANSAC算法进行精确的匹配,求得基础矩阵,然后提取图像中的极线束并计算FOE。实验结果表明,所提算法比Hough 直线求得的FOE误差小,适于实时应用。
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[1]JAIN R.Direct computation of the focus of expansion[J].IEEE Trans Pattern Anal Mach Intell,1983,5(1):58-64. [2]LI Q,REN S.A Real-Time Visual Inspection System for DisCreteSurface Defects of Rail Heads[C]∥IEEE Instrumentation and Easurement.2012:1-11. [3]DUAN W J,ZHAO W,HUANG S L,et al.Automatic measurement method of the inclination of the contact net positioner based on computer vision.China Railway Science,2011,32(4):82-87.(in Chinese) 段汝娇,赵伟,黄松岭,等.基于计算机视觉的接触网定位器倾斜度自动测量方法[J].中国铁道科学,2011,32(4):82-87. [4]WANG J K.Train wheelset detection system based on CCD ima-ging technology .Dalian:Dalian Jiaotong University,2007.(in Chinese) 王君可.基于CCD成像技术的火车轮对检测系统[D].大连:大连交通大学,2007. [5]ZHANGL,KOCH R.Vanishing points estimation and line classification in a manhattanworld[M]∥Computer Vision-ACCV 2012.Springer Berlin Heidelberg,2013:38-51. [6]GEIGER A,LENZ P,URTASUN R.Are we ready for Autonomous Driving?The KITTI Vision Benchmark Suite[C]∥Conference on Computer Vision and Pattern Recognition (CVPR).2012. [7]BADINO H,HUBER D,KANADE T.The CMU Visual Localization Data Set[OL].http://3dvis.ri.cmu.edu/data-sets/locali-zation. [8]DUAN W W.Detection and abnormal recognition of contact network equipment for surveillance video .Chengdu:Southwest Jiaotong University,2016.(in Chinese) 段旺旺.面向监控视频的接触网设备检测及异常识别[D].成都:西南交通大学,2016. [9]HE Z M.Fast detection of vanishing points of the perspective text image .Shanghai University of Engineering and Technology,2012,23(2):229-232.(in Chinese) 贺志明.透视文本图像的灭点快速探测[J].上海工程技术大学报,2012,23(3):229-232. [10]XIE W H,ZHANG Z X,ZHANG J Q.A new camera calibration method based on vanishing points.Journal of Harbin Institute of Technology,2003,35(11):1384-1387.(in Chinese) 谢文寒,张祖勋,张剑清.一种新的基于灭点的相机标定方法[J].哈尔滨工业大学学报,2003,35(11):1384-1387. [11]HARRIS C,STEPHENS M.A combined corner and edge detector[C]∥Alvey Vision Conference.Manchester,UK,1988:147-151. [12]LUCAS B D,KANADE T.An iterative image registration technique with an application to stereo vision[C]∥Proceedings of the 7th International Joint Conference on Artificial Intelligence.1981:674-679. [13]JIANG Z J,YI H R.A feature tracking method based on image pyramid optical flow.Journal of Wuhan University(Information Science Edition),2007,32(8):680-683.(in Chinese) 奖志军,易华蓉.一种基于图像金字塔光流的特征跟踪方法[J].武汉大学学报(信息科学版),2007,32(8):680-683. [14]HE M Y,DAI Y C.Three-Dimensional Measurement Algorithm for Uncalibrated Multi-view Images.Microelectronics & Computer,2010,27(9):181-185.(in Chinese) 何明一,戴玉超.多视角未标定图像三维测量算法[J].微电子学与计算机,2010,27(9):181-185. [15]LIANGJ J,QIN A K,SUGANTHAN P N,et al.Comprehen-sive learning particle swarm optimizer for global optimization of multimodal functions[J].IEEE Transactionson Evolutionary Computation,2006,10(3):281-295. [16]HU Z Y,WU F C.Calibration Method Based on Active Vision Camera.Chinese Journal of Computers,2002,25(11):1149-1156.(in Chinese) 胡占义,吴福朝.基于主动视觉摄像机标定方法[J].计算机学报,2002,25(11):1149-1156. |
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