基于图像引导的交通事故现场实时测绘方法

为了满足交警现场绘制事故现场图的实际需要，提出了基于图像引导的交通事故现场实时测绘方法.首先根据直接线性变换法将事故现场照片由透视图转换为正投影图像；然后直接在正投影图像上进行车辆、人体、散落物和刹车痕迹等事故现场信息的绘制和相关尺寸的标注；最后实现现场图的打印输出并由当事人签字确认.通过典型交通事故案例验证了该方法的有效性.和传统手工测绘相比，该方法在提高事故现场勘测精度的同时，还能大大缩短数据处理和现场绘图时间，满足实时打印输出现场图的要求.

Real Time Mapping Method for Traffic Accident Scene Based on Image Guide

In order to meet the needs of mapping the accident scene diagram on the scene for traffic police, a real time mapping method for traffic accident scene investigation based on image guide was proposed. The proposed procedure consists of a transformation which transforms a single photo of the accident scene from perspective image to orthographic image using direct linear transformation method, followed by mapping accident scene information such as vehicles, bodies, fall out objects, braking traces and so on directly over the orthographic image, and finally printing out the accident scene diagram, which needs to be signed by interested parties. A typical traffic accident case was used to validate the proposed method. Compared with the traditional hands on measurement, the proposed method can not only improve the accuracy of site investigation, but also can considerably reduce the time of on scene data processing and drawing, which contributes to satisfying the requirement of printing out the accident scene diagram in real time.