Fast tracking of hidden objects with single-pixel detectors

• Published in: Electronics letters Vol. 53; no. 15; pp. 1005 - 1008
• Main Authors: Chan, S, Warburton, R.E, Gariepy, G, Altmann, Y, McLaughlin, S, Leach, J, Faccio, D
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 20.07.2017
• Subjects: decision redundancy; enhanced decision fusion; ensemble machine learning schemes; image fusion; image segmentation; intermediate labelled images; learning (artificial intelligence); local majority filter; local majority saliency map; pixel labelling; random decision forest model; real‐time systems; saliency map generation; semantically segmented images; Special Section: NATO Specialists' Meeting on Remote Intelligence of Building Interiors; statistical analysis; statistical perspective; uncertainty challenges; voting algorithm; voting pool; photodetectors; single-pixel SPAD detectors; optical tracking; line-of-sight; illumination power; object tracking; fast hidden object tracking; nonline-of-sight motion tracking; single laser illumination; image motion analysis
• ISSN: 0013-5194; 1350-911X; 1350-911X
• DOI: 10.1049/el.2017.0993

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.