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Optical Engineering

High dynamic range compressive imaging: a programmable imaging system
Author(s): Mehrdad Abolbashari; Faramarz Farahi; Filipe Magalhaes; Francisco M. Araújo; Miguel V. Correia
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Paper Abstract

Some scenes and objects have a wide range of brightness that cannot be captured with a conventional camera. This limitation, which degrades the dynamic range of an imaged scene or object, is addressed by use of high dynamic range (HDR) imaging techniques. With HDR imaging techniques, images of a very broad range of intensity can be obtained with conventional cameras. Another limitation of conventional cameras is the range of wavelength that they can capture. Outside the visible wavelengths, the responsivity of conventional cameras drops; therefore, a conventional camera cannot capture images in nonvisible wavelengths. Compressive imaging is a solution for this problem. Compressive imaging reduces the number of pixels of a camera to one, so a camera can be replaced by a detector with one pixel. The range of wavelengths to which such detectors are responsive is much wider than that of a conventional camera. A combination of HDR imaging and compressive imaging is introduced and is benefitted from the advantages of both techniques. An algorithm that combines these two techniques is proposed, and results are presented.

Paper Details

Date Published: 11 June 2012
PDF: 9 pages
Opt. Eng. 51(7) 071407 doi: 10.1117/1.OE.51.7.071407
Published in: Optical Engineering Volume 51, Issue 7
Show Author Affiliations
Mehrdad Abolbashari, The Univ. of North Carolina at Charlotte (United States)
Faramarz Farahi, The Univ. of North Carolina at Charlotte (United States)
Filipe Magalhaes, INESC TEC (Portugal)
Francisco M. Araújo, INESC TEC (Portugal)
Miguel V. Correia, INESC TEC (Portugal)

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