A Location Awareness System Using Wide-angle Camera and Active IR-Tag

This paper proposes a new location-awareness system, ALTAIR(Automatic Location Tracking with Active IR-tag) that automatically detects and tracks the location of the mobile PC(Persona1 Computer) users. IR(1nfraRed)-tag is stably detected and distinguished by IR filtering camera. Combination of the IR-tag and wireless LAN (Local Area Network) enables ALTAIR to control the IR-tags through the network to perform stable tracking for multiple users. The position of the detected IR-tag and its network information (e.g. IP address) are associated with each other by controlling the emission pattern of the IR-tag in turn. ALTAIR starts to aware the user's position when the user enters the system area, using DHCP(Dynamic Host Configuration Protocol) service. Our experiments show the effective performance to tracking and recognize the users' positions in an office environment.