| Multi camera (Taj & Cavallaro, 2011) |
Easy deployed on the indoor and outdoor localizations |
Multi-camera fusion requires post-processing |
| Panoramic camera (Sun et al., 2020) |
Convenient construction and low cost |
Image distortion needs to be corrected |
| WIFI-PDR Integrated Indoor Positioning (Li et al., 2016) |
Low cost, high positioning accuracy |
Need to collect offline WiFi information and non-real time |
| Camera, IR thermal sensors (Tan, Kuo & Liu, 2019) |
Low cost, real-time with good performance |
Difficult to deploy, thermal sensors are sensitive to temperature |
| Siamese Fully Convolutional Classification and Regression (Guo et al., 2020) |
Fast and accurate |
High requirements for equipment performance |
| PT Camera and smartphone (the proposed system) |
Portable, low-cost, strong robustness and easy to deploy |
Only single-face detection may lead to temporary tracking failure |
