徐汝东, 刘进. 可量测视频目标动态轨迹生成及GIS应用[J]. 武汉大学学报 ( 信息科学版), 2016, 41(6): 818-824. DOI: 10.13203/j.whugis20140518
引用本文: 徐汝东, 刘进. 可量测视频目标动态轨迹生成及GIS应用[J]. 武汉大学学报 ( 信息科学版), 2016, 41(6): 818-824. DOI: 10.13203/j.whugis20140518
XU Rudong, LIU Jin. Real-Time Construction of Dynamic Trajectory of Measurable Video Objects and Its GIS Application[J]. Geomatics and Information Science of Wuhan University, 2016, 41(6): 818-824. DOI: 10.13203/j.whugis20140518
Citation: XU Rudong, LIU Jin. Real-Time Construction of Dynamic Trajectory of Measurable Video Objects and Its GIS Application[J]. Geomatics and Information Science of Wuhan University, 2016, 41(6): 818-824. DOI: 10.13203/j.whugis20140518

可量测视频目标动态轨迹生成及GIS应用

Real-Time Construction of Dynamic Trajectory of Measurable Video Objects and Its GIS Application

  • 摘要: 动态目标三维重建是进一步实现目标地理信息时空分析、目标统计、目标查询、异常报警及各种空间数据挖掘应用的重要基础。利用计算机视觉技术将摄像头中目标框的二维像坐标信息实时动态还原成三维物方目标信息,采用基于物方特征域的模式分类方法,通过目标物方尺寸、目标出现的物方位置进行更准确的目标筛查,提高了目标跟踪的准确性,降低了虚警;通过地平面约束实现单目目标立体定位,增加了立体定位的场景覆盖范围;进而把以帧为单位的视频数据解析成为以目标轨迹为单位的空间三维地理对象信息,并将生成的时空轨迹图层集成到地理信息系统,实现了基于地理信息空间分布的视频时空数据管理。

     

    Abstract: The 3D reconstruction of moving object is an important underlying technology for target statistics, target search, abnormal alarms, and in various data mining applications and other improvements in spatio-temporal analysis on target geographic data. In this paper, we make use of computer vision technology to restore the three-dimensional object space coordinates of the target from its two-dimensional image space coordinates in a real-time camera frame. By applying a pattern classification method based on the object side feature fields and taking the object size and location into account, more accurate target screening results are obtained, this improves the accuracy of object tracking and reduction of false-alarms. Through a monocular stereotactic algorithm based ground planar constraint, video data composed of frames are interpreted to generate the three dimensional geographic information of object consisting of trajectories. The obtained spatio-temporal trajectory as a GIS layer, is further integrated into the GIS system to implement spatio-temporal video-based data management.

     

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