总结了计算机网络安全问题中的安全技术，攻击检测技术的作用、方法。分析了几种典型产品的应用。
The essay mainly introduced the safety problem of safety technology, the function and method of attacking test technology in computer network, analyzed the application of several typical product.
首先，本文研究了计算机视觉相关理论，并对典型的行人检测和跟踪统计算法进行了分析。
First of all, we introduce several related theories of computer vision, and analyze the existed pedestrian detection and tracking algorithms.
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