A Vision-Based Social Distancing and Critical Density Detection System for COVID-19

Social distancing (SD) is an effective measure to prevent the spread of the infectious Coronavirus Disease 2019 (COVID-19). However, a lack of spatial awareness may cause unintentional violations of this new measure. Against this backdrop, we propose an active surveillance system to slow the spread of COVID-19 by warning individuals in a region-of-interest. Our contribution is twofold. First, we introduce a vision-based real-time system that can detect SD violations and send non-intrusive audio-visual cues using state-of-the-art deep-learning models. Second, we define a novel critical social density value and show that the chance of SD violation occurrence can be held near zero if the pedestrian density is kept under this value. The proposed system is also ethically fair: it does not record data nor target individuals, and no human supervisor is present during the operation. The proposed system was evaluated across real-world datasets.

Automated summary

This study proposes a vision-based real-time monitoring system for detecting social distancing violations and slowing the spread of COVID-19 through warnings. It also introduces a critical social density value to keep the chance of violations near zero. The system does not record data, target individuals, or require human supervision during operation, and has been evaluated using real-world datasets.