Calibration-based minimalistic multi-exposure digital sensor camera robust linear high dynamic range enhancement technique demonstration

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dc.contributor.authorRiza, Nabeel A.
dc.contributor.authorAshraf, Nazim
dc.date.accessioned2021-01-26T09:53:06Z
dc.date.available2021-01-26T09:53:06Z
dc.date.issued2021-01-12
dc.date.updated2021-01-26T09:44:53Z
dc.description.abstractDemonstrated for a digital image sensor-based camera is a calibration target optimized method for finding the Camera Response Function (CRF). The proposed method uses localized known target zone pixel outputs spatial averaging and histogram analysis for saturated pixel detection. Using the proposed CRF generation method with a 87 dB High Dynamic Range (HDR) silicon CMOS image sensor camera viewing a 90 dB HDR calibration target, experimentally produced is a non-linear CRF with a limited 40 dB linear CRF zone. Next, a 78 dB test target is deployed to test the camera with this measured CRF and its restricted 40 dB zone. By engaging the proposed minimal exposures, weighting free, multi-exposure imaging method with 2 images, demonstrated is a highly robust recovery of the test target. In addition, the 78 dB test target recovery with 16 individual DR value patches stays robust over a factor of 20 change in test target illumination lighting. In comparison, a non-robust test target image recovery is produced by 5 leading prior-art multi-exposure HDR recovery algorithms using 16 images having 16 different exposure times, with each consecutive image having a sensor dwell time increasing by a factor of 2. Further validation of the proposed HDR image recovery method is provided using two additional experiments, the first using a 78 dB calibrated target combined with a natural indoor scene to form a hybrid design target and a second experiment using an uncalibrated indoor natural scene. The proposed technique applies to all digital image sensor-based cameras having exposure time and illumination controls. In addition, the proposed methods apply to various sensor technologies, spectral bands, and imaging applications.en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid126789en
dc.identifier.citationRiza, N. A. and Ashraf, N. (2021) 'Calibration-based minimalistic multi-exposure digital sensor camera robust linear high dynamic range enhancement technique demonstration', Optics Communications, 486, 126789 (9 pp). doi: 10.1016/j.optcom.2021.126789en
dc.identifier.doi10.1016/j.optcom.2021.126789en
dc.identifier.endpage9en
dc.identifier.issn0030-4018
dc.identifier.journaltitleOptics Communicationsen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/10958
dc.identifier.volume486en
dc.language.isoenen
dc.publisherElsevieren
dc.relation.urihttp://www.sciencedirect.com/science/article/pii/S0030401821000390
dc.rights© 2021 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)en
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectHigh dynamic rangeen
dc.subjectImage processingen
dc.subjectImaging systemsen
dc.subjectImage enhancementen
dc.subjectImage reconstruction techniquesen
dc.subjectMultiframe image processingen
dc.titleCalibration-based minimalistic multi-exposure digital sensor camera robust linear high dynamic range enhancement technique demonstrationen
dc.typeArticle (peer-reviewed)en
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