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浏览/检索结果: 共8条,第1-8条 帮助

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Adaptively-Weighted Blind Image Restoration Algorithm Based on Energy Constraint 期刊论文  OAI收割
Guangxue Xuebao/Acta Optica Sinica, 2018, 卷号: 38, 期号: 2
作者:  
Su, Chang;  Fu, Tianjiao;  Zhang, Xingxiang;  Ren, Jianyue;  Jin, Longxu
  |  收藏  |  浏览/下载:21/0  |  提交时间:2019/09/17
Optical-system design for large field-of-view three-line array airborne mapping camera 期刊论文  OAI收割
Guangxue Jingmi Gongcheng/Optics and Precision Engineering, 2018, 卷号: 26, 期号: 9, 页码: 2334-2343
作者:  
Yao, Yuan;  Xu, Yong-Sen;  Ding, Ya-Lin;  Yuan, Guo-Qin
  |  收藏  |  浏览/下载:12/0  |  提交时间:2019/09/17
Design of large field for visible/infrared integrated optical system 期刊论文  OAI收割
hongwai yu jiguang gongcheng/infrared and laser engineering, 2016, 卷号: 45, 期号: 10
作者:  
收藏  |  浏览/下载:27/0  |  提交时间:2016/12/23
Modulation transfer function in seeker camera limits resulting from missile flutter caused by aerodynamic force (EI CONFERENCE) 会议论文  OAI收割
2010 2nd International Conference on Industrial Mechatronics and Automation, ICIMA 2010, May 30, 2010 - May 31, 2010, Wuhan, China
作者:  
Zhang X.;  Zhang X.;  Zhang X.
收藏  |  浏览/下载:27/0  |  提交时间:2013/03/25
The imaging quality of seeker in flight mode has been evaluated through analyzing the effects of missile flutter on optical modulation transfer function (MTF) of the optical system. Firstly the data of transverse vibration has been processed to eliminate the trend term caused by the trajectory  then obtained the displacement with two times trapezoidal integration. For the side rotation  the high frequency noise interference in the data has been filtered by using five-point moving average method. Took this model as the quivering rule between the object and the image  and then analyzed the effects of the transverse vibration and the side rotation on imaging quality through MTF. By calculation  the r.m.s value of the image motion caused by missile transverse vibration is 0.026mm  and the side rotation angle is 0.0044 . Through the establishment of two modulation transfer functions (MTF) of image random vibration and linear vibration  the results show that the image quality had declined  and the effect of transverse vibration on image quality is obvious. Through improving the rigidity of the missile and selection of small focal length optical system and shorten the time of exposure can improve the imaging quality of the seeker. 2010 IEEE.  
Real-time video compressing under DSP/BIOS (EI CONFERENCE) 会议论文  OAI收割
MIPPR 2009 - Medical Imaging, Parallel Processing of Images, and Optimization Techniques: 6th International Symposium on Multispectral Image Processing and Pattern Recognition, October 30, 2009 - November 1, 2009, Yichang, China
Chen Q.-P.; Li G.-J.
收藏  |  浏览/下载:24/0  |  提交时间:2013/03/25
This paper presents real-time MPEG-4 Simple Profile video compressing based on the DSP processor. The programming framework of video compressing is constructed using TMS320C6416 Microprocessor  the architecture level optimizations are used to improve software pipeline. The system used DSP/BIOS to realize multi-thread scheduling. The whole system realizes high speed transition of a great deal of data. Experimental results show the encoder can realize real-time encoding of 768*576  TDS510 simulator and PC. It uses embedded real-time operating system DSP/BIOS and the API functions to build periodic function  25 frame/s video images. 2009 Copyright SPIE - The International Society for Optical Engineering.  tasks and interruptions etcs. Realize real-time video compressing. To the questions of data transferring among the system. Based on the architecture of the C64x DSP  utilized double buffer switched and EDMA data transfer controller to transit data from external memory to internal  and realize data transition and processing at the same time  
Multiangular polarized characteristics of cirrus clouds at 1380 NM 会议论文  OAI收割
2008 IEEE International Geoscience and Remote Sensing Symposium - Proceedings, Boston, MA, United states, July 6, 2008 - July 11,2008
Cheng, Tianhai; Gu, Xingfa; Chen, Liangfu; Yu, Tao
收藏  |  浏览/下载:7/0  |  提交时间:2014/12/07
Numerical simulation of wavefronts diffracted by apertures with circular symmetry 期刊论文  OAI收割
optik, 2007, 卷号: 118, 期号: 11, 页码: 521, 526
Qu Weijuan; 刘立人; 刘德安; 职亚楠; Lu Wei; Wang Chunhua
收藏  |  浏览/下载:1040/243  |  提交时间:2009/09/18
Theoretical studies of electron paramagnetic resonance parameters for Cr4+ ions in Ca2GeO4 crystals 期刊论文  OAI收割
Communications in Theoretical Physics, 2005, 卷号: 43, 期号: 2, 页码: 337-340
X. X. Wu; W. C. Zheng; Y. Mei
收藏  |  浏览/下载:37/0  |  提交时间:2012/04/14