Table 3

Dropped frame comparison between Pi USB Cam and commercial webcam

CameraLighting
condition
Recording
length (s)
Video file
length (s)
Target
FPS
True
FPS
Total dropped
frames
Dropped frames
per min
CommercialRed house light300.56 ± 6.08124.77 ± 2.52208.30 ± 0.003515.00 ± 71.25702.00 ± 0.00
Pi USB camRed house light300.60 ± 6.09300.54 ± 6.092020.00 ± 0.000.00 ± 0.000.00 ± 0.00
CommercialWhite house light311.05 ± 4.39179.57 ± 17.432011.57 ± 1.162628.60 ± 377.60505.60 ± 69.40
Pi USB camWhite house light311.02 ± 4.41310.96 ± 4.402020.00 ± 0.000.00 ± 0.000.00 ± 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.