检索结果-内蒙古大学图书馆

7th International Conference on Photonics and Imaging in Biology and Medicine

作者： Yangguang, Sun Tian, Lan Xiaowei, Fu Mingyue, Ding Institute of Pattern Recognition and Artificial Intelligence Image Processing and Intelligence Control Key Laboratory of Education Ministry of China Huazhong University of Science and Technology Wuhan 430074 China School of Life Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)9780819475398

In this paper we proposed a novel path integral method using multilevel Metropolis sampling to extract the contours of interested objects of medical images, which is a quantum statistical approach inspired by the essential characteristics of quantum. The implemented multilevel Metropolis sampling is a fast approach to the sampling problem and can be used to sample any distribution function and calculate all actions for the movements of quantum particle towards the position with high probability density likely to be accepted. Comparing with traditional deformable models based on classical mechanics which are sensitive to the initialization of contour and difficult to adapt topology changes of the contour, our work has the capability to break through the limitations of deformable models and makes the boundary extraction in high noise and low contrast of medical images possible. Experiments were performed with synthetic and medical images and the feasibility and potential of our method was demonstrated. © 2009 SPIE.

关键词： Distribution functions

来源：评论

学校读者我要写书评

暂无评论

The Estimation of Blur Based on image Information

The Estimation of Blur Based on Image Information

引用

International Conference on image and Graphics (ICIG)

作者： Feng Duan Yanning Zhang Shaanxi Key Laboratory of Speech and Image Information Processing School of Computer Science Northwestern Polytechnical University Xi'an China

ISBN: (纸本)9781424452378

Blind image deconvolution is required in many applications of microscopy imaging, remote sensing, and astronomical imaging. The primary difficulty with blind image restoration is insufficient information. We propose a novel algorithm in the estimation of blur based on convex optimization theory and image information. How to extract the information from image is discussed in this paper. Finally, the non-blind image restoration is introduced and good performance is observed in the experiments.

关键词： Deconvolution image restoration Kernel Bayesian methods Filters Motion estimation Degradation Shape Computer graphics Laboratories

来源：评论

学校读者我要写书评

暂无评论

An Edge-Preserving Wavelet Denoising Method Based on MRF

An Edge-Preserving Wavelet Denoising Method Based on MRF

引用

International Conference on image and Graphics (ICIG)

作者： Yongpeng Zhang Feng Duan Rui Cui Shaanxi Key Laboratory of Speech & Image Information Processing School of Computer Science Northwestern Polytechnical University Xi'an China

ISBN: (纸本)9781424452378

In this paper, we improve the soft-threshold by using Markov random field (MRF) theory to preserve the edges of images. According to MRF theory, the similarity problem of the edge structure can be transformed into an energy function minimization problem. Through computing all the energies of the edge structures in clique c, we can find the edge structure with the minimum energy, and regard it as the edge structure of this place. In this way, we can gain the edge information of an image. Here we detect the edge of image in wavelet domain. In our method we preserve the wavelet coefficients which belong to edge set; for the other wavelet coefficients, the soft threshold method is applied. Then, we reconstruct the treated wavelet coefficients by using inverse wavelet transform. The experiment result shows that our method is better than the hard threshold and soft threshold method. It will not only smooth away noise, but also preserve the edge of image.

关键词： Noise reduction image edge detection Wavelet domain Frequency Wavelet coefficients Markov random fields image reconstruction image processing Fourier transforms Pixel

来源：评论

学校读者我要写书评

暂无评论

A statistical approach to contour extraction based on quantum mechanics

A statistical approach to contour extraction based on quantu...

引用

Medical Imaging 2009 - image processing

作者： Sun, Yangguang Lan, Tian Fu, Xiaowei Ding, Mingyue Institute of Pattern Recognition and Artificial Intelligence Image Processing and Intelligence Control Key Laboratory of Education Ministry of China Huazhong University of Science and Technology Wuhan 430074 China School of Life Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)9780819475107

Contour extraction is a key issue in many medical applications. A novel statistical approach based on quantum mechanics to extract contour of the interested object of medical images was proposed in this paper. The natures of quantum statistical concepts such as the quantum discontinuity and the wave function correspond to the discrete and gray possibility of an image respectively. Contour extraction will be performed by the quantum particle movement, where the particle will be moved forward to the position with high probability density edges in image potential field. Experimental results with medical images demonstrated that the proposed approach has the capability to extract contours with arbitrary initialization and handle topology changes as well as both the inner and outer contours by a single initialization. keywords: Statistical approach, contour extraction, path integral, quantum mechanics. © 2009 Copyright SPIE - The International Society for Optical Engineering.

关键词： Medical applications

来源：评论

学校读者我要写书评

暂无评论

Illumination Invariant Multi-pose Face Tracking

Illumination Invariant Multi-pose Face Tracking

引用

International Conference on image and Graphics (ICIG)

作者： Wei Wei Yanning Zhang Zenggang Lin Shaanxi Key Laboratory of Speech & Image Information Processing School of Computer Science Northwestern Polytechnical University Xi'an China

A novel face tracking algorithm is proposed which is less insensitive to large face appearance variation caused by lighting and viewpoints. The proposed dynamic face appearance model includes an illumination invariant pose manifold to represent the pose nonlinearity and an object-specific incremental multi-pose face model. The pose manifold is built with the patch alignment algorithm, where the tensor based illumination reduction is used to define the local patch. Particularly, the probability of the face belonging to the pose manifold can be used for choosing the object-specific face model. The experimental results show the face tracking model can successfully track faces under unseen poses and changing illuminations.

关键词： Lighting Face detection Target tracking Head Computer graphics Laboratories Speech processing Information processing Computer science Tensile stress

来源：评论

学校读者我要写书评

暂无评论

Improvement of directed diffusion protocol based on data aggregation

Improvement of directed diffusion protocol based on data agg...

引用

2009 International Conference on Computational Science and Engineering, CSE '09

作者： Hui, Chen Yufeng, Shi Ye, Wang Yang, Laurence T. Naixue, Xiong Key laboratory of ministry of education for image processing and intelligent control Huazhong University of Science and Technology Wuhan China Department of Computer Science St Francis Xavier University Canada Department of Computer Science Georgia State University Georgia GA United States

ISBN: (纸本)9780769538235

How to make full use of the limited energy available and prolonging the survival time of node is a major concern in research on Wireless Sensor Networks (WSNs). This paper presented an improved approach based on Directed Diffusion Protocol (DDP) which could meet the features of WSN, such as data-oriented, many-to-one transmissions and low energy costs, together with data aggregation mechanisms which emphasized on cascading timeouts, to eliminate the redundancy caused by the transmission of large amounts of data. This modified protocol prohibited the direct forwarding of central nodes, balancing data traffic of different sensors between the source and the sink, and proved to be able of reducing total network flows, energy consumptions and prolonging the lifetime of the network through simulations.

关键词： Sensor nodes

来源：评论

学校读者我要写书评

暂无评论

image Compression with Downsampling and Overlapped Transform at Low Bit Rates

Image Compression with Downsampling and Overlapped Transform...

引用

International Conference on image processing

作者： Jiaji Wu Yan Xing Guangming Shi Licheng Jiao Key Laboratory of Intelligent Perception and Image Understanding of Ministry of Education of China Institute of Intelligent Information Processing Xidian University

ISBN: (纸本)9781424456536;9781424456543

This paper proposes an image coding method based on adaptive downsampling which not only uses the pixel redundancy but also considers visual redundancy. At the encoder side, codec adaptively chooses some smooth regions of the original image to downsample, and then overlapped transform with selectivity, block DCT and adaptive-shape DCT (SA-DCT) are used against the image after being downsampled. For the incomplete transformed image, OB-SPECK is adopted to code. At the decoder side, in order to reduce the computational complexity, we use the simple cubic interpolation which not only is very suitable to the downsampled regions but also enhances greatly the real time of this coding system. Experimental results show the proposed method outperforms JPEG2000, SPECK, SPIHT, and LT+SPECK at low bit rates.

关键词： Adaptive downsampling Interpolation image compression Visual redundancy Bit rate image compression Data compression downsampling Interpolation image coding method original image Transform

来源：评论

学校读者我要写书评

暂无评论

The analysis and design of work safety and emergency management information system in large-scale hydroelectric project

The analysis and design of work safety and emergency managem...

引用

2009 Asia-Pacific Power and Energy Engineering Conference, APPEEC 2009

作者： Zhou, Jian-Lan Sun, Zhi-Yu Liu, Xian-Rong Key Laboratory of Education Ministry for Image Processing and Intelligent Control Department of Control Science and Engineering Huazhong University of Science and Technology Wuhan Hubei 430074 China Department of Work Safety China Three Gorges Project Corporation Yichang Hubei 443002 China

ISBN: (纸本)9781424424870

It is significant to research the work safe and emergency management information system (PSEMIS) in large-scale hydroelectric project. This paper analyses the reviews and China Three Gorges Project Corporation work safety and emergency management status and business needs, proposes the overall framework of the system design. The basis of the work safety management system and emergency management system is the safety risk control and hazards classification standards. The paper discusses the safety risk control and hazards classification standards;analyses the main function modules of the work safety and emergency management application software systems respectively;and discusses the hazards risk assessment and identification standards, business model design, systems integration, digital contingency plans and other key technical problems. © 2009 IEEE.

关键词： Hazards

来源：评论

学校读者我要写书评

暂无评论

Granular agent evolutionary algorithm for classification

引用

Tien Tzu Hsueh Pao/Acta Electronica Sinica 2009年第3期37卷 628-633页

作者： Pan, Xiao-Ying Jiao, Li-Cheng Liu, Fang Key Laboratory of Intelligent Perception and Image Understanding Institute of Intelligent Information Processing Xidian University Xi'an 710071 China School of Computer Science and Engineering Xidian University Xi'an 710071 China

By inspiration of the granular evolutionary algorithm, a Granular Agent Evolutionary algorithm for Classification (GAEC) is proposed. The method uses the granular agent to denote the set of examples that have similar attributions and the knowledge base guides the evolutionary of granular agent. Also some granular evolutionary operators are designed for classification problem. Assimilation operator, exchange operator, and differentiation operator reflect the competitive, cooperative and self-learning ability of agent respectively. Finally, some classification rules are extracted from granular agents by some strategies to forecast the sort of new data. Empirical studies show that the algorithm has a good classification prediction, and only need a small price for the training time. In most UCI datasets, the performance of GAEC is better than G-NET, OCEC and C4.5, which have good performance.

关键词： Evolutionary algorithms

来源：评论

学校读者我要写书评

暂无评论

Skeleton-based fast path planning for UAV

Skeleton-based fast path planning for UAV

引用

MIPPR 2009 - Remote Sensing and GIS Data processing and Other Applications: 6th International Symposium on Multispectral image processing and Pattern Recognition

作者： Liu, Xin Zhou, Chengping Ding, Mingyue Cai, Chao Institute for Pattern Recognition and Artificial Intelligence National Lab. for Multi-spectral Information Processing Technologies Huazhong University of Science and Technology Wuhan 430074 China College of Life Science and Technology Image Processing and Intelligent Control Key Laboratory of Education Ministry of China Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)9780819478092

A new path planning method for UAV in static workspace is presented. The method can find a nearly optimal path in short time which satisfies the UAV kinematic constraints. The method makes use of the skeletons to construct the graph of the planning space considering the configuration of the obstacles and utilizes the graph to find a shortest collision-free path, and a novel technique is utilized to convert the free path into a feasible path. The method can be applied to different applications and easy to be implemented. Experimental results showed that the path planning can be done in a fraction of second on a contemporary workstation (2-3 seconds) under the condition of satisfying the kinematic constraints. © 2009 Copyright SPIE - The International Society for Optical Engineering.

关键词： Motion planning

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：