检索结果-内蒙古大学图书馆

7th Asia Pacific conference on Optics Manufacture (APCOM)

作者： Yi, Huang Jun, Chang Li Dongmei Cao Jiajing Shan, Du Beijing Inst Technol Beijing 100081 Peoples R China Univ Chinese Acad Sci Beijing 100049 Peoples R China Chinese Acad Sci Inst Semicond Beijing 100083 Peoples R China

ISBN: (数字)9781510652095

ISBN: (纸本)9781510652095;9781510652088

By combining optical systems and image processing, wavefront coding can greatly expand the depth of focus and depth of field of optical systems. It has been widely used in iris detection, high-power microscopic objective lens, infrared optical system athermalized, and so on. At present, the image restoration algorithms commonly used in wavefront coding are based on deconvolution, Wiener filtering, and so on. Although these algorithms can achieve an excellent image restoration effect, they will also bring boundary ringing effects and artifacts to the image. When the image is disturbed by strong noise, the restoration effect will also be seriously affected. To solve these problems, a wavefront coded image restoration algorithm based on compressed sensing is proposed in this paper. The strong data reconstruction ability of the compressed sensing restoration algorithm is used to restore the encoded image obtained by the wavefront coding system. This method can effectively suppress noise and reconstruct the image without artifact and boundary ringing effect. Through the comparison of simulation results, the effectiveness of the proposed method is verified.

关键词： wavefront coding compressed sensing artifact

来源：评论

学校读者我要写书评

暂无评论

Automatic extraction and identification of lines of communication from high-resolution multispectral imagery 2

Automatic extraction and identification of lines of communic...

引用

conference on algorithms for Multispectral and Hyperspectral imagery II

作者： West, KF Lersch, JR Iverson, AE Webb, BN Stevenson, HA SCI APPLICAT INT CORP TUCSONAZ 85711

ISBN: (纸本)0819421391

Use of remotely sensed imagery to map lines of communication or revise existing maps is currently a labor-intensive process. In this paper, we present a system for automatically extracting lines of communication from high- resolution (less than 5-meter spatial resolution) multispectral imagery. Positive systems ADAR 5500 imagery is used to demonstrate system functionality. Our system includes automatic detection and identification algorithms, a geospatial database for storage and retrieval of results, a change detection component that compares newly detected lines of communication against stored database information, and a user interface that allows operator review and editing of automatically extracted results.

关键词： multispectral lines of communication roads mapping image processing

来源：评论

学校读者我要写书评

暂无评论

Optics for full-parallax holographic stereograms

Optics for full-parallax holographic stereograms

引用

conference on Practical Holography XI and Holographic Materials iii

作者： Klug, MA Klein, A Plesniak, W Kropp, A Chen, BJ MIT Media Lab. (United States) California Institute of Technology (United States)

ISBN: (纸本)0819424226

In the evolution of synthetic holography as a viable medium for industrial design and scientific visualization, the inclusion of full parallax represents a logical next step from the previous horizontal parallax-only approaches. The significant increase in full-parallax information content implies the need for high speed perspective view synthesis, optimized mechano-optical recording systems, and novel hologram illumination approaches. This paper outlines recording techniques for producing full-parallax holographic stereograms of computer-synthesized and acquired data. We document on-the-fly high-speed rendering software that integrates the printing and image-synthesis steps. In the interest of hologram printer size control, approaches for optical image plane enlargement are highlighted, and successful examples of A4-size (30 cm x 21 cm) full-parallax images are presented. We assess perspective-view array and image-plane pixel resolutions and their effect on overall image quality, in particular with respect to medium-size formats. Finally, we demonstrate optimized illumination techniques for controlling image clarity, including dispersion-compensated and edge-illuminated approaches.

关键词： Holography Holograms Stereo holograms Printing 3D image reconstruction Collimation image quality Volume holography Distortion image processing

来源：评论

学校读者我要写书评

暂无评论

A Statistical approach to line segmentation in handwritten documents

A Statistical approach to line segmentation in handwritten d...

引用

conference on Document Recognition and Retrieval XIV

作者： Arivazhagan, Manivannan Srinivasan, Harish Srihari, Sargur SUNY Buffalo CEDAR Amherst NY 14228 USA

ISBN: (纸本)9780819466136

A new technique to segment a handwritten document into distinct lines of text is presented. Line segmentation is the first and the most critical pre-processing step for a document recognition/analysis task. The proposed algorithm starts, by obtaining an initial set of candidate lines from the piece-wise projection profile of the document. The lines traverse around any obstructing handwritten connected component by associating it to the line above or below. A decision of associating such a component is made by (i) modeling the lines as bivariate Gaussian densities and evaluating the probability of the component under each Gaussian or (ii) the probability obtained from a distance metric. The proposed method is robust to handle skewed documents and those with lines running into each other. Experimental results show that on 720 documents (which includes English,Arabic and children's handwriting) containing a total of 11, 581 lines, 97.31 % of the lines were segmented correctly. On an experiment over 200 handwritten images with 78, 902 connected components, 98.81 % of them were associated to the correct lines.

关键词： image segmentation Detection and tracking algorithms image processing algorithms and systems Mirrors Switches Binary data Electronic imaging Matrices Statistical analysis Statistical modeling

来源：评论

学校读者我要写书评

暂无评论

Advanced Computational Methods in Life System Modeling and Simulation 1st ed. 2017

引用

丛书名： Communications in Computer and Information Science

2017年

作者： Minrui Fei Shiwei Ma Xin Li Xin Sun Li Jia Zhou Su

ISBN: (数字)9789811063701

ISBN: (纸本)9789811063695

The three-volume set CCIS 761, CCIS 762, and CCIS 763 constitutes the thoroughly refereed proceedings of the International conference on Life System Modeling and Simulation, LSMS 2017, and of the International conference on Intelligent Computing for Sustainable Energy and Environment, ICSEE 2017, held in Nanjing, China, in September 2017. The 208 revised full papers presented were carefully reviewed and selected from over 625 submissions. The papers of this volume are organized in topical sections on: Biomedical Signal processing; Computational Methods in Organism Modeling; Medical Apparatus and Clinical Applications; Bionics Control Methods, algorithms and Apparatus; Modeling and Simulation of Life systems; Data Driven Analysis; image and Video processing; Advanced Fuzzy and Neural Network Theory and algorithms; Advanced Evolutionary Methods and Applications; Advanced Machine Learning Methods and Applications; Intelligent Modeling, Monitoring, and Control of Complex Nonlinear systems; Advanced Methods for Networked systems; Control and Analysis of Transportation systems; Advanced Sliding Mode Control and Applications; Advanced Analysis of New Materials and Devices; Computational Intelligence in Utilization of Clean and Renewable Energy Resources; Intelligent Methods for Energy Saving and Pollution Reduction; Intelligent Methods in Developing Electric Vehicles, Engines and Equipment; Intelligent Computing and Control in Power systems; Modeling, Simulation and Control in Smart Grid and Microgrid; Optimization Methods; Computational Methods for Sustainable Environment.

关键词：

来源：评论

学校读者我要写书评

暂无评论

No Reference Color image Quality Measures

No Reference Color Image Quality Measures

引用

IEEE International conference on Cybernetics (CYBCONF)

作者： Gao, Chen Panetta, Karen Agaian, Sos Tufts Univ Elect & Comp Engn Dept Medford MA 02155 USA Univ Texas San Antonio Elect & Comp Engn Dept San Antonio TX 78249 USA

ISBN: (纸本)9781467364690

Color image quality assessment is essential in evaluating the performance of color image enhancement and retrieval algorithms. Much effort has been made in recent years to develop objective image quality metrics that correlate with perceived quality measurements. Unfortunately, only limited success has been achieved [1]. In this paper we present: a) a new contrast based grayscale image quality measure: Root Mean Enhancement (RME);b) a color RME contrast measure CRME which explores the three dimensional contrast relationships of the RGB color channels;c) a color measure Color Qiality Enhancement (CQE) which is based on the linear combination of colorfulness, sharpness and contrast. Computer simulations show that the new measures may help to evaluate color image quality and choose the optimal operating parameters in color image processing systems. We demonstrate the effectiveness of the presented measures by using the TID2008 database. We also compare the presented measures with subjective evaluation Mean Opinion Score (MOS). Experimental results show good correlations between the presented measures and MOS.

关键词： color measure Root Mean Enhancement (RME) Color/Cube Root Mean Enhancement (CRME) Color Quality Enhancement (CQE)

来源：评论

学校读者我要写书评

暂无评论

Estimation of speech embedded in a reverberant environment with multiple sources of noise

Estimation of speech embedded in a reverberant environment w...

引用

IEEE International conference on Acoustics, Speech, and Signal processing

作者： Barros, AK Itakura, F Rutkowski, T Mansour, A Ohnishi, N BMC RIKEN JPN Japan

ISBN: (纸本)0780370414

In this work we develop a system for enhancement of the speech signal with highest energy from a linear convolutive mixture of n statistically independent sound sources recorded by m microphones, where m < n. In this system we use the concept of independent component analysis (ICA) together with auditory filter banks, pitch tracking, adaptive band pass filters and masking. Computer simulations and real world experiments confirm the validity of the proposed algorithm.

关键词： Speech processing

来源：评论

学校读者我要写书评

暂无评论

Correlation filters for object tracking target re-acquisition and smart aimpoint selection

Correlation filters for object tracking target re-acquisitio...

引用

conference on Optical Pattern Recognition Viii

作者： Mahalanobis, A Hughes Missile Systems Co. (United States)

ISBN: (纸本)0819424889

Correlation filters designed for automatic target recognition can be used for assisting trackers. We show that a tracker may use the filters for independent verification of the target as necessary. In particular, a form of the filters known as unconstrained correlation filters is shown to be optimal from a detection standpoint. An example is given to illustrate the concept of target reacquisition when the tracker's lock is broken.

关键词： image filtering Distortion Detection and tracking algorithms Electronic filtering Target detection Tolerancing Automatic target recognition image processing Automatic tracking Composites

来源：评论

学校读者我要写书评

暂无评论

Simulating Nailfold Capillaroscopy Sequences to Evaluate algorithms for Blood Flow Estimation

Simulating Nailfold Capillaroscopy Sequences to Evaluate Alg...

引用

35th Annual International conference of the IEEE-Engineering-in-Medicine-and-Biology-Society (EMBC)

作者： Tresadern, P. A. Berks, M. Murray, A. K. Dinsdale, G. Taylor, C. J. Herrick, A. L. Univ Manchester Ctr Imaging Sci Manchester M13 9PT Lancs England Univ Manchester Inst Inflammat & Repair Manchester M13 9PT Lancs England

ISBN: (纸本)9781457702167

The effects of systemic sclerosis (SSc) - a disease of the connective tissue causing blood flow problems that can require amputation of the fingers - can be observed indirectly by imaging the capillaries at the nailfold, though taking quantitative measures such as blood flow to diagnose the disease and monitor its progression is not easy. Optical flow algorithms may be applied, though without ground truth (i.e. known blood flow) it is hard to evaluate their accuracy. We propose an image model that generates realistic capillaroscopy videos with known flow, and use this model to quantify the effect of flow rate, cell density and contrast ( among others) on estimated flow. This resource will help researchers to design systems that are robust under real-world conditions.

关键词： biomedical optical imaging blood blood flow measurement blood vessels capillarity cellular biophysics diseases flow simulation image sequences medical image processing patient monitoring

来源：评论

学校读者我要写书评

暂无评论

A novel GPU-based sonar simulator for real-time applications

引用

COMPUTERS & GRAPHICS-UK 2017年 68卷 66-76页

作者： Cerqueira, Romulo Trocoli, Tiago Neves, Gustavo Joyeux, Sylvain Albiez, Jan Oliveira, Luciano Brazilian Inst Robot SENAI CIMATEC 1845 Orlando Gomes Ave BR-41650010 Salvador BA Brazil DFKI GmbH Robot Innovat Ctr Robert Hooke Str 1 D-28359 Bremen Germany Univ Fed Bahia Intelligent Vis Res IVIS Lab 2 Prof Aristides Novis St BR-40210630 Salvador BA Brazil

Mainly when applied in the underwater environment, sonar simulation requires great computational effort due to the complexity of acoustic physics. Simulation of sonar operation allows evaluating algorithms and control systems without going to the real underwater environment;that reduces the costs and risks of in-field experiments. This paper tackles with the problem of real-time underwater imaging sonar simulation by using the OpenGL shading language chain on GPU. Our proposed system is able to simulate two main types of acoustic devices: mechanical scanning imaging sonars and forward-looking sonars. The underwater scenario simulation is performed based on three frameworks: (i) OpenSceneGraph reproduces the ocean visual effects, (ii) Gazebo deals with physical forces, and (iii) the Robot Construction Kit controls the sonar in underwater environments. Our system exploits the rasterization pipeline in order to simulate the sonar devices, which are simulated by means of three parameters: the pulse distance, the echo intensity and the sonar field-of-view, being all calculated over observable objects shapes in the 3D rendered scene. Sonar-intrinsic operational parameters, speckle noise and object material properties are also considered as part of the acoustic image. Our evaluation demonstrated that the proposed system is able to operate close to or faster than the real-world devices. Also, our method generates visually realistic sonar images when compared with real-world sonar images of the same scenes. (C) 2017 Elsevier Ltd. All rights reserved.

关键词： Simulated sensor data Sonar imaging GPU-based processing Robot construction kit (Rock) Underwater robotics

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：