检索结果-内蒙古大学图书馆

2008 International Conference on Audio，Language and Image processing(2008国际声音、语言、图像过程大会)

作者： Najla Mohaghegh Omid Fatemi Multimedia Processing Laboratory School of Electrical and Computer Engineering University of Tehran Tehran

Recently, digital watermarking has been one of the most appealing domains in copyright protection because of its residence in the content and negligible visual effects. In this paper, a video watermarking scheme is proposed which embeds copyright information in H.264 bitstream motion vectors. In the proposed method, a watermark string is embedded into the motion vector components with the larger size considering the video movement direction which will be retrieved in decoder. The main contribution is to adjust an adaptive threshold in such a way that with a defined number of embedded bits, i.e. the watermark payload, the video quality degradation will be negligible.

关键词： Watermarking Video sequences Signal to noise ratio Streaming media Payloads Visualization Decoding

来源：评论

学校读者我要写书评

暂无评论

Nonlinear forecast modeling based on wavelet analysis

Nonlinear forecast modeling based on wavelet analysis

引用

International Conference on computer Science and Software engineering, CSSE 2008

作者： Liu, Fang Jiang, Desheng Fu, Bo Zhou, Jianzhong School of Computer Science and Technology Wuhan University of Technology China Key Laboratory of Fiber Optic Sensing Technology and Information Processing Ministry of Education Wuhan University of Technology China School of Electrical and Electronic Engineering Hubei University of Technology China School of Hydropower and Information Engineering Huazhong University of Science and Technology China

ISBN: (纸本)9780769533360

System modeling is a complex nonlinear procedure. Traditional methods are easy to get slow convergence and low efficiency. The nonlinear forecast modeling based on wavelet analysis is proposed and used to forecast the change trends of runoff. It inherits the multiresolution capability of wavelets analysis, and with the generalization of forecast modeling, the presented method is applied to annual runoff forecast of Yichang. The simulation performance is compared with that of autoregressive model. It is shown that wavelet analysis is able to find the latent detail information of time series and supply satisfying forecast results under different time scales. © 2008 IEEE.

关键词： Wavelet analysis

来源：评论

学校读者我要写书评

暂无评论

Designing an MPSoC architecture with run-time and evolvable task decomposition and scheduling: A neural network case study

Designing an MPSoC architecture with run-time and evolvable ...

引用

International Conference on Innovations in Information Technology

作者： Shervin Vakili S. Mehdi Fakhraie Siamak Mohammadi Silicon Intelligence and VLSI Signal Processing Laboratory School of Electrical and Computer Engineering University of Tehran Tehran Iran

Decomposition of programs into concurrent tasks and scheduling them among computational recourses are two major problems in hardware and software developments of multiprocessor systems. This paper presents a novel homogeneous multiprocessor architecture, in which a hardware core performs these two jobs at run-time using genetic algorithm. This core looks for an efficient decomposition and scheduling scheme for the running application based on available computational resources. The main novel feature of this system is its capability of executing uni-processor sequential programs directly by cooperation of all available processors. This system is called EvoMP (evolvable multiprocessor) and recently introduced in detail by the authors (in another literature). This paper presents a brief description of the operational and architectural aspects of EvoMP and studies applicability of this platform for neural network applications.

关键词： Runtime Neural networks Processor scheduling computer architecture Hardware Concurrent computing Programming Multiprocessing systems Genetic algorithms Application software

来源：评论

学校读者我要写书评

暂无评论

Three-dimensional ISAR imaging based on antenna array

Three-dimensional ISAR imaging based on antenna array

引用

作者： Ma, Changzheng Yeo, Tat Soon Zhang, Qun Tan, Hwee Siang Wang, Jun IEEE School of Electric and Information Engineering Zhongyuan University of Technology Zhengzhou 450007 China Department of Electrical and Computer Engineering National University of Singapore Singapore 117576 Singapore Institute of Telecommunication Engineering Air Force Engineering University Xi'an 710071 China National Key Laboratory of Radar Signal Processing Xidian University Shaanxi 710071 China

In this paper, a 3-D inverse synthetic aperture radar (ISAR) imaging method based on an antenna array configuration is proposed. The performance of conventional interferometric ISAR imaging system using three antennas is poor, as the positions of scatterers, which have the same range-Doppler value and projected onto the ISAR plane as a synthesis scatterer, cannot be correctly estimated. However, by using two antenna arrays perpendicular to each other, the system's ability to separate these scatterers can be improved. The criterion for the selection of a range unit that contains an isolated scatterer in the 2-D array domain for doing motion compensation is discussed. If there is no range unit which contains only an isolated scatterer, then radial and cross-range motion compensation has to be carried out by motion parameter estimation. Two cross-range motion parameters measurement algorithms, one based on array processing of the range profile and another based on correlation of ISAR images of different antennas, are proposed. The coordinates registration problem for the scatterers of a synthesis scatterer is also discussed. Simulation results have shown the effectiveness of the proposed methods. © 2008 IEEE.

关键词： Synthetic aperture radar

来源：评论

学校读者我要写书评

暂无评论

Fundamental Uncertainty Rotationally Symmetric and Anamorphic Laser Triangulation

引用

电子学报(英文版) 2008年第1期17卷 8-11页

作者： WANG Lei GAO Jun WANG Xiaojia Johannes Eckstein Peter Ott Laboratory of Image Information Processing School of Computer and Information Hefei University of Technology Hefei 230009 China Optical Engineering Laboratory Heilbronn University Heilbronn 74081 Germany Department of Mechanical and Electrical Engineering Xiamen University Xiamen 361005 China

来源：评论

学校读者我要写书评

暂无评论

Address discharge delay reduction in AC PDP by applying MgO nanoparticle under protective layer

Address discharge delay reduction in AC PDP by applying MgO ...

引用

8th International Meeting on Information Display - International Display Manufacturing Conference 2008 and Asia Display 2008, IMID/IDMC/ASIA DISPLAY 2008

作者： Seo, Ki-Ho Shin, Seungha Choi, Mansoo Whang, Ki-Woong Display Laboratory Corporate R and D center Samsung SDI 428-5 Gongse-dong Giheung-gu Yongin-si Gyeonggi-do 446-577 Korea Republic of Nanotechnology and Thermal processing Laboratory School of Mechanical and Aerospace Engineering Seoul National University 599 Gwanangno Gwanak-gu Seoul 151-744 Korea Republic of Plasma Laboratory School of Electrical Engineering and Computer Science 053 Seoul National University 599 Gwanangno Gwanak-gu Seoul 151-744 Korea Republic of

We report a method for improving characteristics of AC PDP in this study. This improvement is obtained by spreading MgO nanoparticles on transparent dielectric layer. These nanoparticles are covered with MgO protective layer by electron beam evaporation. MgO nanoparticle has difference in cathodoluminescence stronger than MgO layer by electron beam evaporation. This method worked for reducing statistical delay especially. Efficacy, discharge voltage and luminance were also improved. But these improvements has limited lifetime because continuous ion bombardments changed characteristic of MgO surface.

关键词： Magnesia

来源：评论

学校读者我要写书评

暂无评论

Numerical simulation of two-dimensional photonic crystal with FDTD method

引用

Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of Technology 2008年第3期30卷 5-7页

作者： Zhou, Jian Jiang, Hong-Zhou Zhang, Lin Wang, Lin Zeng, Chun-Nian Chen, Ji State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China School of Information Engineering Wuhan University of Technology Wuhan 430070 China School of Automotive Engineering Wuhan University of Technology Wuhan 430070 China Department of Electrical and Computer Engineering University of Houston Houston United States

Based on the theory of photonic crystal and its characteristic, which was known as photonic band gap (PBG), the finite-difference time-domain (FDTD) method, including absorbing boundary condition and periodic boundary condition, was used to simulate transmission characteristic of two-dimensional photonic crystal, which has periodic Al2O3 cylinder array structure. Incident wave was presumed as s-polarized wave. In two incident angles which were 0° and 30°, electric field, phase and transmissivity in the range of 1-30 μm were calculated. Numerical simulation results showed that PBG of photonic crystal existed in the range 12-18 μm (infrared waveband), and it may be used to develop infrared wave-guide.

关键词： FDTD Periodic structure Photonic band gap Photonic crystal

来源：评论

学校读者我要写书评

暂无评论

A study on the effect of camera motion on human visual attention

A study on the effect of camera motion on human visual atten...

引用

IEEE International Conference on Image processing

作者： Golnaz Abdollahian Zygmunt Pizlo Edward J. Delp Video and Image Processing Laboratory (VIPER) School of Electrical and Computer Engineering Purdue University West Lafayette IN USA Department of Psychological Sciences Purdue University West Lafayette IN USA

The aim of this paper is to examine the effect of camera motion in user generated video with respect to human visual attention. Having a more accurate human attention model is particularly useful in applications such as video summarization where the identification of visual importance is crucial to the quality of the results. Most models proposed thus far, have not considered camera motion as an independent factor in identifying visual saliency. In this study eye movement was recorded while subjects watched videos with different types of camera motion. The distribution of the fixation points indicated high correlation between the visual saliency and the type and direction of camera movement. The statistical tests confirmed that the results are statistically significant.

关键词： Cameras Humans Layout Testing Video sequences Image processing Laboratories Psychology Information analysis Shape

来源：评论

学校读者我要写书评

暂无评论

A kidney segmentation approach from DCE-MRI using level sets

A kidney segmentation approach from DCE-MRI using level sets

引用

IEEE computer Society Conference on computer Vision and Pattern Recognition Workshops (CVPRW)

作者： H. Abdelmunim Aly A. Farag W. Miller Mohamed AboelGhar Department of Computer Science Computational Biomedicine Laboratory University of Houston Houston TX USA Computer Vision and Image Processing LabDepartment of Electrical and Computer Engineering University of Louisville Louisville KY USA Medical School Mansoura University Mansoura Egypt

Acute rejection is the most common reason of graft failure after kidney transplantation, and early detection is crucial to survive the transplanted kidney function. Automatic classification of normal and acute rejection transplants from dynamic contrast enhanced magnetic resonance imaging (DCEMRI), is of great importance. Kidney segmentation is the first step for such classification. The image intensity inside the kidney is used as an indication of failure/success. Differentiating between different cases cases is implemented by comparing subsequential kidney scans signals. So, this process is mainly dependent on segmentation. This paper introduces a new shape-based segmentation approach based on level sets. Training shapes are collected from different real data sets to represent the shape variations. Signed distance functions are used to represent these shapes. The methodology incorporates image and shape prior information in a variational framework. The shape registration is considered the backbone of the approach where more general transformations can be used to handle the process. We introduce a novel shape dissimilarity measure that enables the use of different (inhomogeneous) scales. The approach gives successful results compared with other techniques restricted to transformations with homogeneous scales. Results for segmenting kidney images will be illustrated and compared with other approaches to show the efficiency of the proposed technique.

关键词： Level set Image segmentation computer vision Magnetic resonance imaging Shape measurement Biopsy Biomedical computing computer science Image processing Biomedical imaging

来源：评论

学校读者我要写书评

暂无评论

Nonlinear Forecast Modeling Based on Wavelet Analysis

Nonlinear Forecast Modeling Based on Wavelet Analysis

引用

International Conference on computer Science and Software engineering

作者： Fang Liu Desheng Jiang Bo Fu Jianzhong Zhou School of Computer Science and Technology Wuhan University of Technology China Key Laboratory of Fiber Optic Sensing Technology and Information Processing of Ministry of Education Wuhan University of Technology China School of Electrical and Electronic Engineering Hubei University of Technology China School of Hydropower and Information Engineering Huazhong University of Science and Technology China

ISBN: (纸本)9781424439027

关键词： Predictive models Wavelet analysis Signal resolution Information analysis Time series analysis Educational technology Harmonic analysis computer science Modeling Floods

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：