Dropped frame comparison between Pi USB Cam and commercial webcam
| Camera | Lighting condition | Recording length (s) | Video file length (s) | Target FPS | True FPS | Total dropped frames | Dropped frames per min |
|---|---|---|---|---|---|---|---|
| Commercial | Red house light | 300.56 ± 6.08 | 124.77 ± 2.52 | 20 | 8.30 ± 0.00 | 3515.00 ± 71.25 | 702.00 ± 0.00 |
| Pi USB cam | Red house light | 300.60 ± 6.09 | 300.54 ± 6.09 | 20 | 20.00 ± 0.00 | 0.00 ± 0.00 | 0.00 ± 0.00 |
| Commercial | White house light | 311.05 ± 4.39 | 179.57 ± 17.43 | 20 | 11.57 ± 1.16 | 2628.60 ± 377.60 | 505.60 ± 69.40 |
| Pi USB cam | White house light | 311.02 ± 4.41 | 310.96 ± 4.40 | 20 | 20.00 ± 0.00 | 0.00 ± 0.00 | 0.00 ± 0.00 |
Five-minute videos (640 × 480 resolution, 20 FPS, avi format) were recorded from each camera via Synapse software for five trials under red and white house light illumination. Results are expressed as mean ± SEM.