Using image entropy maximum for auto exposure

被引：12
|
作者：
Rahman, Mohammad T. [1 ]
Kehtarnavaz, Nasser [1 ]
Razlighi, Qolamreza R. [1 ]
机构：
[1] Univ Texas Dallas, Richardson, TX 75080 USA
来源：
JOURNAL OF ELECTRONIC IMAGING | 2011年 / 20卷 / 01期
关键词：
D O I：
10.1117/1.3534855
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
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. (C) 2011 SPIE and IS&T. [DOI: 10.1117/1.3534855]
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页数：10
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