High-efficient detection of traffic parameters by using two foreground temporal-spatial images

Jianqiang Ren, Le Xin, Yangzhou Chen, Deliang Yang
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引用次数: 4

Abstract

Real-time detection of vehicular volume, mean speed and vehicle type has important significance, but the existing video-based detection methods are not satisfactory at processing speed and accuracy. This paper proposes a high-efficient method to detect all the three parameters from two foreground temporal-spatial images (TSIs) directly, which are obtained from two virtual detection lines (VDLs) in video frames. Such usage of the TSIs provides a feasible approach to solve the problems of vehicle occlusion, mean-speed estimation, and vehicle classification without using original frame images. Firstly, for improving the accuracy of detection, during generation of the foreground TSIs, we set a small-wide region of interest for each VDL and propose a local background subtraction method and an improved moving shadows elimination method to eliminate unwanted interferences. Then, in order to reduce the calculation complexity, during extraction of the parameters, we analyze the feasibility of vehicle classification direct from the foreground TSIs, and propose a method to extract shape-feature vector from the TSIs directly. The dependence on original frame images is minimized, so the pressing speed is improved obviously. Experimental results prove the feasibility and efficiency of the proposed method.
基于两幅前景时空图像的交通参数高效检测
实时检测车辆体积、平均速度和车辆类型具有重要的意义,但现有的基于视频的检测方法在处理速度和精度上都不尽如人意。本文提出了一种从视频帧中的两条虚拟检测线(vdl)获取的两幅前景时空图像(tsi)中直接检测这三个参数的高效方法。tsi的这种使用为在不使用原始帧图像的情况下解决车辆遮挡、平均速度估计和车辆分类问题提供了一种可行的方法。首先,为了提高检测精度,在生成前景tsi时,我们为每个VDL设置了小范围的感兴趣区域,并提出了一种局部背景减去方法和一种改进的运动阴影消除方法来消除不必要的干扰。然后,为了降低计算复杂度,在参数提取过程中,分析了直接从前景tsi中提取车辆分类的可行性,提出了直接从前景tsi中提取形状特征向量的方法。减小了对原始帧图像的依赖,明显提高了压缩速度。实验结果证明了该方法的可行性和有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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