Figure 1
From: Smartphone-based low light detection for bioluminescence application
Comparison of (A) normal (no algorithm applied) and (B) NREA-applied accumulation results. A total accumulation of 20 images was made for the comparison, and a cross-sectional view at the LED center area from every three results is shown. The S/N ratio comparison along the number of accumulated image is shown at (C) normal accumulation, and (D) NREA applied accumulation. Mean value of the noise, maximum of the signal (peak intensity value at the LED center area), and computed S/N ratio are visualized. Both the slope and the value of the signal from the normal accumulation is higher than that of the NREA-applied case; however, the mean of the noise is also higher. So, overall the S/N ratio for the normal accumulation case is worse than that of the NREA-applied case.
