Fig. 3. Environment detection accuracy with various threshold values and score calculation ranges.Figure optionsDownload full-size imageDownload as PowerPoint slide
With these Pyroxamide settings, we compared the detection delays and accuracies of indoor/outdoor transitions with two previous methods proposed by R. Hansen et al. [10], which utilize both GPS and Wi-Fi Positioning System (WPS). As the application of WPS requires Wi-Fi radio maps to be prepared [10], we constructed Wi-Fi radio maps of the buildings shown in Fig. 2. We also collected Wi-Fi and GPS signals along with the collected sound probes for the test of WPS-based and GPS-based transition detections.
Fig. 4 shows the cumulative accuracies of transition detections in a directional selection given time for the three methods. As illustrated in the figure, the proposed method reduced the average transition detection delays by more than 80% compared to the previous methods. The detection time of the proposed method took only 3.81 s in average, whereas Hansen’s methods required 16 s with GPS, and 67 s with Wi-Fi for the transition detection.
With these Pyroxamide settings, we compared the detection delays and accuracies of indoor/outdoor transitions with two previous methods proposed by R. Hansen et al. [10], which utilize both GPS and Wi-Fi Positioning System (WPS). As the application of WPS requires Wi-Fi radio maps to be prepared [10], we constructed Wi-Fi radio maps of the buildings shown in Fig. 2. We also collected Wi-Fi and GPS signals along with the collected sound probes for the test of WPS-based and GPS-based transition detections.
Fig. 4 shows the cumulative accuracies of transition detections in a directional selection given time for the three methods. As illustrated in the figure, the proposed method reduced the average transition detection delays by more than 80% compared to the previous methods. The detection time of the proposed method took only 3.81 s in average, whereas Hansen’s methods required 16 s with GPS, and 67 s with Wi-Fi for the transition detection.