基于视频图像鉴定车速中的参照物选定两例

Two Analysis of Reference Object Selection in Speed Identifi cation Cases Based on Video Images

合理地选取或设定参照物是提高基于视频图像鉴定车辆行驶速度效率与精度的关键。本文介绍了两起交通事故车速鉴定的典型案例,鉴定人员基于视频图像选取参照物计算车辆行驶速度,并利用提取的VDR文件、EDR文件数据进行验证,总结出在基于视频图像鉴定车辆行驶速度的实践中,参照物的选定可根据实际情况与条件优先考虑制动前区域、道路参照物、目标车辆通过的整数帧、目标车辆某轮廓的几何中心等方案,希冀为相关案件的鉴定提供参考。

Reasonable selection or setting of reference objects is the key to improve the efficiency and accuracy of vehicle speed identification based on video images.This paper introduces two typical cases of vehicle speed appraisal in traffic accidents.The appraiser selected reference objects based on video images to calculate vehicle speed,and used the extracted VDR file and EDR file data for verification,and summarized the selection methods of reference objects in the practice of vehicle speed identification based on video images.According to the actual situation and conditions,the selection of reference objects can give priority to the pre-braking area,road reference objects,integer frames passed by the target vehicle,and the geometric center of a contour of the target vehicle.Using the above method is helpful to select and set reference objects correctly and quickly,and ensure the smooth exploration,measurement of the vehicle speed appraisal site and appraisal quality.