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Journal of Electronic Imaging

Estimation-theoretic approach to dynamic range enhancement using multiple exposures
Author(s): Mark A. Robertson; Sean Borman; Robert L. Stevenson
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Paper Abstract

We present a new approach for improving the effective dynamic range of cameras by using multiple photographs of the same scene taken with different exposure times. Using this method enables the photographer to accurately capture scenes that contain high dynamic range by using a device with low dynamic range, which allows the capture of scenes that have both very bright and very dark regions. We approach the problem from a probabilistic standpoint, distinguishing it from the other methods reported in the literature on photographic dynamic range improvement. A new method is proposed for determining the camera's response function, which is an iterative procedure that need be done only once for a particular camera. With the response function known, high dynamic range images can be easily constructed by a weighted average of the input images. The particular form of weighting is controlled by the probabilistic formulation of the problem, and results in higher weight being assigned to pixels taken at longer exposure times. The advantages of this new weighting scheme are explained by comparison with other methods in the literature. Experimental results are presented to demonstrate the utility of the algorithm.

Paper Details

Date Published: 1 April 2003
PDF: 10 pages
J. Electron. Imaging. 12(2) doi: 10.1117/1.1557695
Published in: Journal of Electronic Imaging Volume 12, Issue 2
Show Author Affiliations
Mark A. Robertson, Univ. of Notre Dame (United States)
Sean Borman, Univ. of Notre Dame (United States)
Robert L. Stevenson, Univ. of Notre Dame (United States)

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