求翻译：在研究清晰化算法之前，为减小运算量和提高系统的实时性，先对视频监控中的运动目标进行检测和提取，介绍和分析了几种经典的运动目标检测的方法，在此基础上，结合帧差法和背景差分法的优缺点，提出了一种改进的运动目标检测算法，该算法基于动态阈值二值化图像，通过帧差，再与背景差分，实时更新背景，能够获取更为精确的运动目标。是什么意思？

Clarity in the study of algorithms before, in order to reduce computation and improve the system's real-time, first on the video surveillance of moving targets for detection and extraction, description and analysis of several classic method of moving target detection, on this basis , combined with t

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In research clear of algorithm zhiqian, for reduces operations volume and improve system of real-time sexual, first on video monitored in the of movement target for detection and extraction, describes and analysis has several classic of movement target detection of method, this Foundation Shang, com

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