Computational imaging of light in flight

Matthias B. Hullin

doi:10.1117/12.2074695

29 October 2014 Computational imaging of light in flight

Matthias B. Hullin

Proceedings Volume 9273, Optoelectronic Imaging and Multimedia Technology III; 927314 (2014) https://doi.org/10.1117/12.2074695
Event: SPIE/COS Photonics Asia, 2014, Beijing, China

Abstract

Many computer vision tasks are hindered by image formation itself, a process that is governed by the so-called plenoptic integral. By averaging light falling into the lens over space, angle, wavelength and time, a great deal of information is irreversibly lost. The emerging idea of transient imaging operates on a time resolution fast enough to resolve non-stationary light distributions in real-world scenes. It enables the discrimination of light contributions by the optical path length from light source to receiver, a dimension unavailable in mainstream imaging to date. Until recently, such measurements used to require high-end optical equipment and could only be acquired under extremely restricted lab conditions. To address this challenge, we introduced a family of computational imaging techniques operating on standard time-of-flight image sensors, for the first time allowing the user to “film” light in flight in an affordable, practical and portable way. Just as impulse responses have proven a valuable tool in almost every branch of science and engineering, we expect light-in-flight analysis to impact a wide variety of applications in computer vision and beyond.

Citation Download Citation

Matthias B. Hullin "Computational imaging of light in flight", Proc. SPIE 9273, Optoelectronic Imaging and Multimedia Technology III, 927314 (29 October 2014); https://doi.org/10.1117/12.2074695

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