Diffuse imaging: Replacing lenses and mirrors with omnitemporal cameras
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Goyal_Diffuse imaging.pdf
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Author(s)
Kirmani, Ahmed
Jeelani, Haris
Montazerhodjat, Vahid
Goyal, Vivek K.
Date Issued
August 2011
Journal
Wavelets and Sparsity XIV, Conference 2011
Publisher
Society of Photo-optical Instrumentation Engineers
Citation
Kirmani, Ahmed et al. “Diffuse Imaging: Replacing Lenses and Mirrors with Omnitemporal Cameras.” Wavelets and Sparsity XIV Conference, August 21, 2011, San Diego, California, USA (Proc. SPIE 8138), 2011. 81380O–81380O–6. Web.
Version
Final published version
Abstract
Conventional imaging uses steady-state illumination and light sensing with focusing optics; variations of the light field with time are not exploited. We develop a signal processing framework for estimating the reflectance f of a Lambertian planar surface in a known position using omnidirectional, time-varying illumination and unfocused, time-resolved sensing in place of traditional optical elements such as lenses and mirrors. Our model associates time sampling of the intensity of light incident at each sensor with a linear functional of f. The discrete-time samples are processed to obtain ℓ2-regularized estimates of f. Using non-impulsive, bandlimited light sources instead of impulsive illumination significantly improves signal-to-noise ratio (SNR) and reconstruction quality.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Research Laboratory of Electronics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1117/12.896718
