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Auto exposure control for high frame rate camera using image histogram feature function 期刊论文
Guangxue Jingmi Gongcheng/Optics and Precision Engineering, 2017, 卷号: 25, 期号: 4
作者:  Ma, Z.-L.;  H.-B. Gao;  Y. Yu and L.-H. Cai
收藏  |  浏览/下载：17/0  |  提交时间：2018/06/13
Auto exposure algorithm for aerial camera based on histogram statistics method 期刊论文
Dianzi Yu Xinxi Xuebao/Journal of Electronics and Information Technology, 2016, 卷号: 38, 期号: 3
作者:  Shen, X.;  J. Liu and G. Chu
收藏  |  浏览/下载：17/0  |  提交时间：2017/09/11
Aberration properties of off-axis freeform surface optical system 期刊论文
Guangxue Xuebao/Acta Optica Sinica, 2016, 卷号: 36, 期号: 7
作者:  Shi, H.;  X. Zhang;  L. Wang;  C. Wang and H. Jiang
收藏  |  浏览/下载：12/0  |  提交时间：2017/09/11
Design and application of accurate pointing and auto-unlocking sun tracker on satellite 期刊论文
Guangxue Jingmi Gongcheng/Optics and Precision Engineering, 2016, 卷号: 24, 期号: 1
作者:  Wang, Y.-P.;  K. Wang;  R.-D. Jia and W. Fang
收藏  |  浏览/下载：11/0  |  提交时间：2017/09/11
多光谱成像系统图像处理关键技术研究 学位论文
博士: 中国科学院大学, 2015
作者:  张艳超
收藏  |  浏览/下载：139/0  |  提交时间：2015/11/30
高数值孔径投影光刻物镜的光学设计 学位论文
博士: 中国科学院大学, 2015
作者:  徐明飞
收藏  |  浏览/下载：63/0  |  提交时间：2015/11/30
基于数字图像处理的自动调焦技术研究 学位论文
博士: 中国科学院大学, 2014
刘雪超
收藏  |  浏览/下载：53/0  |  提交时间：2014/08/21
Real-time auto-light system for high-speed camera 会议论文
3rd International Conference on Advanced Design and Manufacturing Engineering, ADME 2013, July 13, 2013 - July 14, 2013, Anshan, China
Yang H.; Liang M. H.
收藏  |  浏览/下载：12/0  |  提交时间：2014/05/15
Method of auto multi-exposure for high dynamic range imaging (EI CONFERENCE) 会议论文
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
Piao Y.; Xu W.
收藏  |  浏览/下载：12/0  |  提交时间：2013/03/25
This paper proposes a method for calculating the multi-exposure times fast and accurately when the scene has a high dynamic range  minimizing the pictures needed to take and improving the dynamic range of the CCD system. The proposed method first measures the camera's response function referring [10]. After that the median value of the output picture is adjusted to be in the middle range of the system output by changing the exposure time. It can be inferred from the histogram of the current picture whether it's a high dynamic range scene by calculating the number of pixels under exposed and over exposed. Once again the under and over exposed pixels are adjusted to be in the middle according to the camera's response function. Finally different exposed pictures (2 or 3) are fused together by Gaussian function and the dynamic range is compressed by y correction. Experimental results on UNIQ-UM400 analog camera and a digital acquisition system show that the algorithm works well and solve the problem of low dynamic range of CCD camera. 2010 IEEE.  
The application of auto-controlled liquid crystal light valve arrays to photolithography shutter (EI CONFERENCE) 会议论文
ICO20: Optical Devices and Instruments, August 21, 2005 - August 26, 2005, Changchun, China
Chen Y.; Liang L.; He H.
收藏  |  浏览/下载：12/0  |  提交时间：2013/03/25
Photolithography shutter is usually used to control exposure in order to obtain patterns of code disc and metrology grating which are the core components of optical shaft encoder. But perforated film as photolithography shutter has many disadvantages such as taking too long time to perforate  easily making wrong code  lower reusable ratio. Mathematical models for resist property  luminous efficiency and exposure have been established by deducing their relations for avoiding the disadvantages  which provides the theory of using liquid crystal light valve (LCLV) replacing proforated film. Based on operating principles of LCLV and control theories of photolithography shutter  the principle diagram of control circuit of LCLV arrays has been designed according to theirs control principles. In the control system  LCLV arrays as photolithography shutter are realized by adopting DS75451 to drive them and using AT89C51 chip to control them. By photolithographic experiment  the patterns of code disc are good  the edges of lines are vertical  it indicates LCLV arrays as photolithography shutter may control exposure and light passing accords with the intending requires. It proves using LCLV arrays replacing perforated film as photolithography shutter is feasible completely.  

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