Pedestrian's Intelligent Transport System

本研究旨在发展一套以普适穿戴式电脑技术及合作式分散视觉技术为基础，以方便及安全行人使用的行人智慧交通系统（PITS）。一个是盲人的辅助系统，即智能手杖，另一个是普适计算系统，以获取和可视化行人的交通流。智能手杖具有由三个激光指示器和一个CCD摄像机组成的测距仪，并且使用距离的测量结果来估计用户面前的地板的情况。用于感知和可视化行人流的普适计算系统由用于获得行人流的大小和方向的街道终端和用于在街道地图上可视化所获得的流信息的信息集成终端组成。我们开发了一个新地点自动检测和跟踪用户的位置并识别用户以在街道终端和用户的可穿戴设备之间连接的感知系统电脑该系统由两个部分组成，鱼眼透镜安装CCD相机和红外标签指示用户的位置的用户位置传感系统。我们开发的系统能够实时管理两个或多个用户的信息，并能够从由于视觉遮挡等原因造成的跟踪误差中恢复。

This research aims to develop a pedestrian's intelligent transport system (PITS) for convenience and safety of the pedestrian based on ubiquitous and wearable computers techniques and cooperative distributed vision techniques.In 2001, we developed two components of PITS. One is the supporting system of the blind, that is, Intelligent Cane, and the other is a ubiquitous computing system to obtain and visualize traffic flow of Pedestrians. Intelligent cane has a rangefinder consisting of three laser pointers and one CCD camera, and estimates a situation of floor before the user with the use of measurement results of distance. The ubiquitous computing system to sense and visualize streams of pedestrians consists of street terminals to obtain size and direction of streams of pedestrians, and information integration terminal to visualize obtained streams information on a street map.In 2002, we developed a new location-awareness system that automatically detects and tracks the location of users and identifies the users to connect between street terminal and user's wearable computer. This system consists of two components, sensing systems of user position with fish-eye lens installed CCD camera and IR tags indicating user's position. Our developed this system is capable of managing information of two or more users in real-time process and recovering from the tracking error because of visual occlusion and so on.