在基于视频图像方法的车辆检测系统中，兴趣区域的提取是至关重要的。
It is important to extract RIO(region of interest) in vehicle detection system based on video image.
它是集运动车辆视频检测、车牌识别等技术于一体的智能化车辆检测系统。
It is an intelligent system that include many techniques, such as video vehicle detection, license plate recognition.
给出了一种利用锁相环构造车辆检测系统的方法，并就该系统各部分的设计进行了分析和讨论。
A new method which employs PLL to design vehicle detectors is presented in this paper. The designing of deferent parts of the detecting system is discussed and analyzed.
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