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Research on High Precision Locating of Laser Spot Center in Free-Space Laser Communication System 会议论文
Xi'an, China, 2021-10-15
作者:  Meng, Xiangsheng;  Ma, Caiwen;  Tian, Yan;  Han, Junfeng;  Liang, Dongsheng
收藏  |  浏览/下载：20/0  |  提交时间：2021/12/06
Compensation method for distorted active phased array antennas in condition of quantization errors based on structural-electromagnetic coupling 会议论文
London, United kingdom, April 9, 2018 - April 13, 2018
作者:  Wang, Yan;  Wang, Congsi;  Gao, Wei;  Xu, Qian;  Yuan, Shuai
收藏  |  浏览/下载：267/0  |  提交时间：2019/12/18
Stabilization for networked control systems with limited communication 会议论文
3rd International Conference on Advanced Design and Manufacturing Engineering, ADME 2013, Anshan, China, July 13-14, 2013
作者:  Liu YY(刘英英);  Chu YK(褚云凯)
收藏  |  浏览/下载：14/0  |  提交时间：2013/12/26
Exploring DCT coefficient quantization effect for image tampering localization 会议论文
2011 IEEE International Workshop on Information Forensics and Security, WIFS 2011, 2011
作者:  Tan, Tieniu;  Wang, Wei;  Dong, Jing
收藏  |  浏览/下载：8/0  |  提交时间：2015/08/19
Stability of model-based networked control system with quantized feedback 会议论文
Dalian, Liaoning, China, June 18, 2008 - June 20, 2008
作者:  Wang, Zhiwen;  Pan, Wei;  Guo, Ge
收藏  |  浏览/下载：34/0  |  提交时间：2020/11/15
Measuring the system gain of the TDI CCD remote sensing camera (EI CONFERENCE) 会议论文
Advanced Materials and Devices for Sensing and Imaging II, November 8, 2004 - November 10, 2004, Beijing, China
Ya-xia L.; Hai-ming B.; Jie L.; Jin R.; Zhi-hang H.
收藏  |  浏览/下载：53/0  |  提交时间：2013/03/25
The gain of a TDI CCD camera is the conversion between the number of electrons recorded by the TDI CCD and the number of digital units (counts) contained in the CCD image"[1]. TDI CCD camera has been a main technical approach for meeting the requirements of high-resolution and lightweight of remote sensing equipment. It is useful to know this conversion for evaluating the performance of the TDI CCD camera. In general  a lower gain is better. However  the resulting slope is the gain of the TDI CCD. We did the experiments using the Integration Sphere in order to get a flat field effects. We calculated the gain of the four IT-EI-2048 TDI CCD. The results and figures of the four TDI CCD are given.  this is only true as long as the total well depth (number of electrons that a pixel can hold) of the pixels can be represented. High gains result in higher digitization noise. System gains are designed to be a compromise between the extremes of high digitization noise and loss of well depth. In this paper  the mathematical theory is given behind the gain calculation on a TDI CCD camera and shows how the mathematics suggests ways to measure the gain accurately according to the Axiom Tech. The gains were computed using the mean-variance method  also known as the method of photon transfer curves. This method uses the effect of quantization on the variance in the measured counts over a uniformly illuminated patch of the detector. This derivation uses the concepts of signal and noise. A linear fit is done of variance vs. mean  
Bayesian postprocessing algorithm for DWT-based compressed image 会议论文
SingaporeSingapore, 2004/10/18-2004/10/21
作者:  Wen Wei;  Xiao Zhiyun;  Peng Silong;  Wei Wen
收藏  |  浏览/下载：7/0  |  提交时间：2017/01/13
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