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浏览/检索结果: 共20条，第1-10条 帮助

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基于概率图模型的视频目标跟踪与识别方法研究 学位论文  OAI收割
工学博士, 中国科学院自动化研究所: 中国科学院大学, 2015
作者:  刘玉强
收藏  |  浏览/下载：92/0  |  提交时间：2015/09/02
基于目标层次结构的车辆检测技术及应用研究 学位论文  OAI收割
工学博士, 中国科学院自动化研究所: 中国科学院大学, 2014
作者:  田滨
收藏  |  浏览/下载：75/0  |  提交时间：2015/09/02
A distributed computational cognitive model for object recognition 期刊论文  OAI收割
SCIENCE CHINA-INFORMATION SCIENCES, 2013, 卷号: 56, 期号: 9
作者:  Liu YongJin;  Fu QiuFang;  Liu Ye;  Fu XiaoLan
收藏  |  浏览/下载：28/0  |  提交时间：2015/05/19
Mine Evolution Dynamic Monitor Based on Dynamic Object-oriented Model 会议论文  OAI收割
Ismsse 2011, Amsterdam
Jiang Yang-Ming; Dong Qin-Lin
收藏  |  浏览/下载：16/0  |  提交时间：2014/12/07
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：26/0  |  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.  
Phase error estimation with broadband white light by Phase Diversity (EI CONFERENCE) 会议论文  OAI收割
6th International Symposium on Precision Engineering Measurements and Instrumentation, August 8, 2010 - August 11, 2010, Hangzhou, China
作者:  Wang Z.;  Wang B.;  Zhang X.;  Zhang X.;  Zhang X.
收藏  |  浏览/下载：19/0  |  提交时间：2013/03/25
The technique of Phase Diversity (PD) is widely adopted to measure the wavefront error caused by atmosphere turbulence and system error. PD solves the Zernike coefficients of the wavefront by utilizing two images obtained with different defocus value. In this paper  we propose a method to restore the image and estimate the wavefront error of an imaging system. And we use present white noises to verify the robustness of the algorithm. We design an experiment system and implement it in our laboratory. The proposed algorithm is validated by computer simulations and experimental results. To use a broadband white object in experimental system a reasonable simplification for the system model is done. Our results show that the robustness against Gaussian white noises of the method is better then the case when the variance value is 0.03. The proposed method can be used as a wavefront sensor and restore the degradative images by photoelectric image system. 2010 SPIE.  
The study of mapping relation of aeroplane complex motion and image movement and compensation technique (EI CONFERENCE) 会议论文  OAI收割
2010 International Conference on Computer Application and System Modeling, ICCASM 2010, October 22, 2010 - October 24, 2010, Shanxi, Taiyuan, China
Wei Z.; Wang Y.-Y.; Xue W.-Q.; Dai M.
收藏  |  浏览/下载：23/0  |  提交时间：2013/03/25
In order to solve the problem of image blurring due to the image motion which results from the aircraft's motion  attitude changes  and the relative motion of the camera and aircraft firstly  we install linear displacement transducer on the four shock absorbers. By analyzing the displacement values  the geometrical relationship between the camera and the aircraft is acquired  then relative motion amount between the object and the aircraft is obtained according to the motion and attitude changes. After that  making use of geometrical relationship  we can calculate the displacement variation of pixels within the camera exposure time. Thereafter  taking consider variable motion and non-linear motion as uniform motion in a straight line at the moment of imaging  then the model of the blurring image can be established according to the displacement variation of pixels within the camera exposure time  and fuzzy point spread function in the two-dimensional movement is built. By using Wiener filtering method with the optimal window  the image blurring is eliminated in aerial imaging system. Practice proved that this method can effectively eliminate the image blurring in the aerial imaging system. 2010 IEEE.  
impacts separation framework for performance prediction of middleware-based systems 学位论文  OAI收割
2009
Huang Xiang; Zhang Wenbo; Zhang Bo; Wei Jun
  |  收藏  |  浏览/下载：20/0  |  提交时间：2011/03/20
an aspect-oriented modeling approach to predict performance of jca-based systems 学位论文  OAI收割
2009
Zhang Wenbo; Huang Xiang; Zhang Bo; Wei Jun
  |  收藏  |  浏览/下载：27/0  |  提交时间：2011/03/20
Application-oriented Model-base System 会议论文  OAI收割
Geoinformatics 2008 and Joint Conference on Gis and Built Environment: Advanced Spatial Data Models and Analyses, Parts 1 and 2, Bellingham
Zhang Long-qi; Liu Ya-lan; Yan Shou-yong; Yan Lei
收藏  |  浏览/下载：17/0  |  提交时间：2014/12/07