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Journal of Electronic Imaging

Using image entropy maximum for auto exposure
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Paper Abstract

To achieve auto exposure in digital cameras, image brightness is widely used because of its direct relationship with exposure value. To use image entropy as an alternative statistic to image brightness, it is required to establish how image entropy changes as exposure value is varied. This paper presents a mathematical proof along with experimental verification results to show that image entropy reaches a maximum value as exposure value is varied by changing shutter speed or aperture size.

Paper Details

Date Published: 1 January 2011
PDF: 10 pages
J. Electron. Imaging. 20(1) 013007 doi: 10.1117/1.3534855
Published in: Journal of Electronic Imaging Volume 20, Issue 1
Show Author Affiliations
Mohammad T. Rahman, The Univ. of Texas at Dallas (United States)
Nasser Kehtarnavaz, The Univ. of Texas at Dallas (United States)
Qolamreza R. Razlighi, The Univ. of Texas at Dallas (United States)

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