Object_Tracking_and_Time_To_Collision_Estimation:来自KITTI数据集的融合相机和LiDAR测量值可检测，跟踪3D空间中的物体并估计碰撞时间
目标跟踪和碰撞时间估计
这是Udacity传感器融合纳米度的第二个项目。 我融合了来自KITTI数据集的相机和LiDAR测量值，以检测，跟踪3D空间中的物体并估算碰撞时间。 首先，我用YOLOv3处理图像以检测和分类对象。 下图显示了结果。 基于YOLOv3发现的边界框，我开发了一种通过关键点对应关系随时间跟踪3D对象的方法。 接下来，我使用了两种不同的方法来计算碰撞时间（TTC），分别是基于LiDAR和基于相机的TTC。 环境的结构由主要讲师Andreas Haja构建。
基于LiDAR的TTC
我通过使用齐次坐标将前车的3D LiDAR点投影到2D图像平面中。 投影如下图所示。接下来，我将3D LiDAR点分布到相应的边界框。 最后，我根据不同帧的对应边界框中最接近的3D LiDAR点计算了TTC。
基于摄像头的TTC
我使用检测器/描述符的各种组合来找到每个图像中的关键点，并在
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