数据驱动的智能车个性化场景风险图构建

Data-Driven Personalized Scenario Risk Map Construction for Intelligent Vehicles

为实现智能车辆危险预警辅助功能,精确建立个体驾驶员的个性化辅助系统,提出一种数据驱动的智能车个性化场景风险图构建方法。构建复杂交通场景中动静态要素属性与要素之间隐含交互关系的图表征,使用图核方法对图表征数据进行相似性度量,处理分析驾驶员操作数据并获取驾驶员个性化场景危险程度评价标签。基于支持向量机训练识别模型,建立驾驶员个性化危险评价机理与场景特征之间的映射关系,以模型输出的危险程度评价标签与真实值进行实验对比。结果表明,基于场景风险图构建的驾驶员个性化危险场景识别模型识别准确率可达95.8%,比特征向量表示法提高了38.2%,能够有效地做出基于驾驶员驾驶风格的个性化场景危险程度评价。

In order to realize the auxiliary function of danger warning of intelligent vehicle and accurately establish the personalized assistance system for individual drivers,a data-driven personalized scenario risk map construction method for intelligent vehicles is proposed.The graph representation of the attributes and implied interaction of both dynamic and static elements in complex traffic scenes is constructed.The graph kernel method is used to measure the similarity of the graph representation data,and the driver′s operation data is processed and analyzed to obtain the driver′s personalized scene risk evaluation label.The recognition model is trained based on support vector machine and the mapping relationship between the driver′s personalized risk evaluation mechanism and scene features is established.The risk assessment label output by the model and the real value are compared experimentally.The results show that the recognition accuracy of the driver risky driving scene recognition model based on the personalized scenario risk map can reach 95.8%,which is 38.2%higher than that of the method based on feature vector representation,and it can effectively evaluate the risk degree of the personalized scene based on the driver′s driving style.