Figure 4: Relationship between r.m.s. pulse duration and depth-recovery accuracy.
Plot of depth-recovery accuracy versus pulsewidth using our algorithm (steps 2 and 3) versus r.m.s. pulse duration Tp obtained by simulating a low-flux SPAD imaging environment with an average of 10 detected signal photons per pixel and 390-ps time bins. Depth recovery is deemed a success if estimated depth is within 3 cm of ground truth. In all our SPAD-array experiments, we used Tp≈1 ns, which is in the sweet spot between durations that are too short or too long. We emphasize, however, that our algorithm is not tuned to a particular pulsewidth and can be performed using any Tp value.
