NDLI: Variational Approach for the Fusion of Exposure Bracketed Pairs

Content Provider	IEEE Xplore Digital Library
Author	Bertalmio, M. Levine, S.
Copyright Year	1992
Abstract	When taking pictures of a dark scene with artificial lighting, ambient light is not sufficient for most cameras to obtain both accurate color and detail information. The exposure bracketing feature usually available in many camera models enables the user to obtain a series of pictures taken in rapid succession with different exposure times; the implicit idea is that the user picks the best image from this set. But in many cases, none of these images is good enough; in general, good brightness and color information are retained from longer-exposure settings, whereas sharp details are obtained from shorter ones. In this paper, we propose a variational method for automatically combining an exposure-bracketed pair of images within a single picture that reflects the desired properties of each one. We introduce an energy functional consisting of two terms, one measuring the difference in edge information with the short-exposure image and the other measuring the local color difference with a warped version of the long-exposure image. This method is able to handle camera and subject motion as well as noise, and the results compare favorably with the state of the art.
Sponsorship	IEEE Signal Processing Society
Page Count	12
File Size	2123816
Starting Page	712
Ending Page	723
File Format	PDF
ISSN	10577149
Volume Number	22
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Image color analysis Histograms Colored noise Cameras Noise reduction Mathematical model variational methods Color transfer image denoising image fusion
Content Type	Text
Resource Type	Article
Subject	Computer Graphics and Computer-Aided Design Software

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