Using Fisheye Camera For Cost-Effective Multi-View People Localization

Abstract

In advanced multi-view video surveillance systems, people localization is usually a crucial part of the complete system and need to be accomplished in a short time to reserve sufficient processing time for subsequent high-level analysis. As the surveillance area increases, it is required to install a large number of cameras for multi-view people localization. To lower the equipment cost and setup time, we incorporate fisheye (or wide-angle) camera to an efficient vanishing point-based line sampling scheme for people localization, by ensuring the fisheye camera is looking downward so that its principal point becomes the vanishing point of vertical lines. Experimental results show that the utilization of fisheyecamera can (i) achieve localization accuracy comparable or superior to that using ordinary cameras, (ii) reduce the camera count by 75% on the average while covering the same or larger size of a monitored area, and (iii) greatly simplify the camera installation process.

UWB Bistatic Radar Sensor: Across Channels Evaluation

“…Passive positioning systems, however, place a significant emphasis on device-free localization (DFL) systems, which involve entities without electronic devices [12]. While camera-based solutions [13], [14] are typical examples, their computational intensity, high data rates, and privacy concerns arise due to the requirement for high-resolution images. To address these limitations, acoustic and ultrasonic systems [15], [16] typically solve such drawbacks but utilize signals with distinct propagation characteristics and frequencies whose performance is easily corrupted by environmental noise.…”