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一种利用参考图象与路面信息的道路监控摄像机标定方法

, PP. 137-141

Keywords: 交通工程,交通流检测,摄像机标定,车道标线,视频处理

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Abstract:

鉴于基于视频处理技术的交通流检测系统需要进行摄像机的标定才能得到准确的车流速度信息,而传统的人工标定法无法满足道路监控摄像机发生人为转动时的这一要求,提出了一种基于参考图像与路面信息的的道路监控摄像机标定方法。该方法利用车道标线的宽度和间距以及一条垂直于车道标线的线段,即可估计出摄像机的焦距、俯角、水平偏角和距离地面的高度,同时,为了计算"病态条件"下的摄像机参数,提出了在焦距保持不变的情况下,通过旋转摄像机来获取一组合适的参考图像,再通过参考图像来实现标定。在摄像机发生人为转动的情况下,也能方便地通过参考图像和路面信息来实现重标定。仿真试验表明,该方法具有操作方便、计算简单精确的优点,且无需人工现场操作,大大减少了外业工程量。

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