基于一维直接线性变换的视频中路面距离测量方法  

A Method of Measuring Road Distance from Video Based on OnedimensionalDirect Linear Transformation

作　　者：李威 赵明辉 关闯 沈永钢 任重 LI Wei;ZHAO Minghui;GUAN Chuang;SHEN Yonggang;REN Zhong(Academy of Forensic Science&Key Laboratory of Forensic Science,Ministry of Justice&Shanghai Forensic Service Platform,Shanghai 200063,China)

机构地区：[1]司法鉴定科学研究院,司法部司法鉴定重点实验室,上海市司法鉴定专业技术服务平台,上海200063

出　　处：《刑事技术》2024年第5期519-524,共6页Forensic Science and Technology

基　　金：中央级公益性科研院所基本科研业务费专项资金项目(GY2023Z-2)。

摘　　要：为了解决混行路网中不同交通参与方因通行宽度被侵占引发的交通事故路权纠纷,提出一种基于直接线性变换理论的视频中路面距离测量方法。该方法基于一维直接线性变换算法,利用视频中与待测点共线的3个特征点,确定像方距离与物方距离的直接线性变换关系,进而解算目标距离。以Faro Focus^(3D)激光三维扫描仪现场扫描的测量值为参考值,评估该方法的测量误差。实验结果表明,本方法能够有效测量视频中的路面距离,测量精度可达厘米级,并适用于不同拍摄角度的视频,从而确定混行路网中不同事故参与方所属的通行宽度,为司法鉴定、事故处理提供技术支持。To solve the disputes on road rights caused by the invasion of traffi c width by different traffi c participants in the mixed traffi c network,a method for measuring road surface distance in videos based on direct linear transformation theory is proposed.This method uses a one-dimensional direct linear transformation algorithm and relies on three characteristic points in the video that are collinear with the point to be measured to determine the direct linear transformation relationship between the image-side distance and the object-side distance,and then calculate the target distance.The measurement errors of this method are evaluated using the measurement values obtained from on-site scanning by Faro Focus^(3D) laser 3D scanner.Experimental results demonstrate that this method can effectively measure the road distance in videos,with a measurement accuracy reaching the centimeter level,and it is equally applicable to video images taken from different shooting angles.The application of this method can determine the traffi c width of different parties involved in accidents in the mixed traffi c network through video images,providing technical support for judicial appraisal and accident handling.

关 键 词：直接线性变换理论 视频 测距 激光三维扫描仪 交通事故 

分 类 号：DF794.1[政治法律—诉讼法学]