Fig. 2: Virtual aperture remapping operation.
From: Low-latency time-of-flight non-line-of-sight imaging at 5 frames per second
a Green points are the physically scanned illumination positions and black points are the SPAD array’s sensing positions. Data acquired by the SPAD array are remapped into a full virtual aperture; note the highlighted physical and virtual light paths. b Five reconstructions of letters from five separate SPAD pixels and one reconstruction using virtually remapped data from five SPAD pixels. c) Absolute difference between physical and virtual light paths depending on the position on the virtual, full grid for the hidden scene voxel location xv =(2 m,0,0). The relay wall parameters are the ones used in this paper; as the absolute path difference for all points is on the order of the system’s temporal resolution, the approximation is valid.
