Issues with common assumptions about the camera pipeline and their impact in hdr imaging from multiple exposures

Gil Rodríguez, R., Vazquez-Corral, J. and Bertalmío, M. (2019) Issues with common assumptions about the camera pipeline and their impact in hdr imaging from multiple exposures. SIAM Journal on Imaging Sciences, 12 (4). pp. 1627-1642. ISSN 1936-4954

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Abstract

Multiple-exposure approaches for high dynamic range (HDR) image generation share a set of building assumptions: That color channels are independent and that the camera response function (CRF) remains constant while changing the exposure. The first contribution of this paper is to highlight how these assumptions, which were correct for film photography, do not hold in general for digital cameras. As a consequence, results of multiexposure HDR methods are less accurate, and when tonemapped they often present problems like hue shifts and color artifacts. The second contribution is to propose a method to stabilize the CRF while coupling all color channels, which can be applied to both static and dynamic scenes, and yield artifact-free results that are more accurate than those obtained with state-of-the-art methods according to several image metrics.

Item Type:	Article
Uncontrolled Keywords:	color stabilization,high dynamic range,multiexposure sequence,projective transformation,mathematics(all),applied mathematics ,/dk/atira/pure/subjectarea/asjc/2600
Faculty \ School:	Faculty of Science > School of Computing Sciences
Related URLs:	http://www.scopus.com/inward/record.url?...
Depositing User:	LivePure Connector
Date Deposited:	09 Sep 2021 00:21
Last Modified:	08 Mar 2024 14:31
URI:	https://ueaeprints.uea.ac.uk/id/eprint/81342
DOI:	10.1137/19M1250248

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