The investigation of automatic exposure under extreme light

Zefeng Wang; Lei Yang; Jijang Huang; Zhi Zhang; Qingsheng Xie; Yaohong Chen; Jiawen Liao; Zhaohui Zhang; Haifeng Zhang; Kaisheng Zhang

doi:10.1117/12.2074827

19 February 2015 The investigation of automatic exposure under extreme light

Zefeng Wang, Lei Yang, Jijang Huang, Zhi Zhang, Qingsheng Xie, Yaohong Chen, Jiawen Liao, Zhaohui Zhang, Haifeng Zhang, Kaisheng Zhang

Author Affiliations +

Proceedings Volume 9449, The International Conference on Photonics and Optical Engineering (icPOE 2014); 94491W (2015) https://doi.org/10.1117/12.2074827
Event: The International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference (icPOE 2014), 2014, Xi'an, China

Abstract

For imaging equipments, exposure is one of the crucial factors for evaluating the quality of imaging. The correct method of exposure is the key to obtain high-quality image. Traditional calculation of exposure is slow in adaptation under extreme environment. In addition, the object of imaging under extreme light usually cannot achieve suitable gray level. To obtain accurate and effective control of automatic exposure under back light and front light environment, this article divides shoot scenes into different regions, applying the method of fuzzy logic to give each region a different weight number, and finally allowing it to correctly carry out automatic exposure. This method can manage imaging under special light conditions without being affected by the position of the main object. Experiments show that this method can effectively control automatic exposure under all kinds of environments.

Citation Download Citation

Zefeng Wang, Lei Yang, Jijang Huang, Zhi Zhang, Qingsheng Xie, Yaohong Chen, Jiawen Liao, Zhaohui Zhang, Haifeng Zhang, and Kaisheng Zhang "The investigation of automatic exposure under extreme light", Proc. SPIE 9449, The International Conference on Photonics and Optical Engineering (icPOE 2014), 94491W (19 February 2015); https://doi.org/10.1117/12.2074827

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KEYWORDS

Automatic exposure

Fuzzy logic

Automatic control

Cameras

Image quality

Camera shutters

Logic

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