通过分析摄像机模型，本文给出了一种逆透视变换方法。
It's provide a good foundation for the road image processing.
本课题提出了一种用于测量空间三维点坐标的单摄像机模型。
A single camera model used to measure space three-dimensional coordinates was given in this paper.
其他做了的有碰撞地图，摄像机，字体，静态模型。
Others have done a collision map, camera, fonts, static model.
在检测开始之前，首先由摄像机对无人环境持续观测一段时间，建立背景的统计模型；
First, it builds the background model by observing the scene without people in it.
在检测开始之前，首先由摄像机对无人环境持续观测一段时间，建立背景的统计模型；
First, it builds the background model by observing the scene without people in it.
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