Using image entropy maximum for auto exposure

Mohammad T. Rahman; Nasser Kehtarnavaz; Qolamreza R. Razlighi

doi:10.1117/1.3534855

1 January 2011 Using image entropy maximum for auto exposure

Mohammad T. Rahman, Nasser Kehtarnavaz, Qolamreza R. Razlighi

Author Affiliations +

Journal of Electronic Imaging, Vol. 20, Issue 1, 013007 (January 2011). https://doi.org/10.1117/1.3534855

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.

©(2011) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Mohammad T. Rahman, Nasser Kehtarnavaz, and Qolamreza R. Razlighi "Using image entropy maximum for auto exposure," Journal of Electronic Imaging 20(1), 013007 (1 January 2011). https://doi.org/10.1117/1.3534855

Published: 1 January 2011

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