title: Enhanced single-photon time-of-flight 3D ranging.
abstract: We developed a system for acquiring 3D depth-resolved maps by measuring the Time-of-Flight (TOF) of single photons. It is based on a CMOS 32 × 32 array of Single-Photon Avalanche Diodes (SPADs) and 350 ps resolution Time-to-Digital Converters (TDCs) into each pixel, able to provide photon-counting or photon-timing frames every 10 µs. We show how such a system can be used to scan large scenes in just hundreds of milliseconds. Moreover, we show how to exploit TDC unwarping and refolding for improving signal-to-noise ratio and extending the full-scale depth range. Additionally, we merged 2D and 3D information in a single image, for easing object recognition and tracking.
authors.forename: Rudi
authors.initials: R
authors.lastname: Lussana
authors.forename: Federica
authors.initials: F
authors.lastname: Villa
authors.forename: Alberto
authors.initials: A
authors.lastname: Dalla Mora
authors.forename: Davide
authors.initials: D
authors.lastname: Contini
authors.forename: Alberto
authors.initials: A
authors.lastname: Tosi
authors.forename: Franco
authors.initials: F
authors.lastname: Zappa