Abstract
Time-of-flight depth imaging and transient imaging are
two imaging modalities that have recently received a lot of
interest. Despite much research, existing hardware systems
are limited either in terms of temporal resolution or are
prohibitively expensive. Arrays of Single Photon Avalanche
Diodes (SPADs) promise to fill this gap by providing higher
temporal resolution at an affordable cost. Unfortunately
SPAD arrays are to date only available in relatively small
resolutions.
In this work we aim to overcome the spatial resolution
limit of SPAD arrays by employing a compressive sensing camera design. Using a DMD and custom optics, we
achieve an image resolution of up to 800×400 on SPAD Arrays of resolution 64×32. Using our new data fitting model
for the time histograms, we suppress the noise while abstracting the phase and amplitude information, so as to realize a temporal resolution of a few tens of picoseconds