Abstract
A fast tracking system is demonstrated that is based on single laser illumination and a few single-pixel single photon avalanche diode (SPAD) detectors that improves on the previous tracking of non-line-of-sight motion by a factor of 300 in laser power. With an average illumination power of only 2 mW, a 15 cm ×15 cm object located up to 2.5 m away is tracked whilst outside of the direct line-of-sight and moving at approximately 6 cm/s.
Highlights
The past decade has seen an increase in research devoted to visualising and locating objects hidden from view [1,2,3,4,5,6,7,8,9,10,11]
In this Letter, we present a fast tracking system that enables the detection of moving objects outside of the direct line-of-sight using only 2 mW of laser power
We demonstrate that we can accurately track the motion of the hidden object moving in real time
Summary
The past decade has seen an increase in research devoted to visualising and locating objects hidden from view [1,2,3,4,5,6,7,8,9,10,11]. Using time-of-flight sensing [2, 5, 9, 10] and intensity imaging [7], it is possible to track the motion of an object moving outside of the direct line-of-sight. In this Letter, we present a fast tracking system that enables the detection of moving objects outside of the direct line-of-sight using only 2 mW of laser power. We demonstrate that we can accurately locate the hidden object. We demonstrate that we can accurately track the motion of the hidden object moving in real time. On the basis of these results, we claim the feasibility of single-photon counting (SPC) technology for fast detection and location of moving objects such as humans or vehicles potentially in real time
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