提出了一种基于机器视觉与离散傅里叶变换的目标特征识别方法。 利用计算机图像技术采集和处理图像信号；

A identifying image methods based on machine vision and DFT are studied, The images are collected and video signal is processed using computer technology.

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首先介绍了虚拟演播室技术的几个关键：摄像机跟踪系统，蓝背景和虚拟背景，键信号处理与图像合成以及计算机系统；

This paper introduced several keys of virtual studio technology, such as camera tracing system, blue scenery and virtual scenery, key signal transact and picture synthesis.

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其中，数字信号处理技术与数字图像处理技术是实现基于多目标识别的自动乘客计数技术的前提与基础，多目标检测与跟踪计数算法是技术实现与应用的核心。

Technologies of digital signal processing and digital image processing are the basis of APC, and multi-objects detecting and tracking algorithm is the essential factor to implement it.

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