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检索条件"任意字段=International Conference on Computer Graphics, Imaging and Visualization"

共 12023 条记录，以下是4931-4940 订阅

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A Hardware Accelerated Multilevel Visual Classifier for Embedded Visual-Assist Systems 33

A Hardware Accelerated Multilevel Visual Classifier for Embe...

引用

33rd IEEE/ACM international conference on computer-Aided Design (ICCAD)

作者： Cotter, Matthew Advani, Siddharth Sampson, Jack Irick, Kevin Narayanan, Vijaykrishnan Penn State Univ University Pk PA 16802 USA SiliconScapes LLC State Coll PA USA

ISBN: (纸本)9781479962785

Embedded visual assist systems are emerging as increasingly viable tools for aiding visually impaired persons in their day-to-day life activities. Novel wearable devices with imaging capabilities will be uniquely positioned to assist visually impaired in activities such as grocery shopping. However, supporting such time-sensitive applications on embedded platforms requires an intelligent trade-off between accuracy and computational efficiency. In order to maximize their utility in real-world scenarios, visual classifiers often need to recognize objects within large sets of object classes that are both diverse and deep. In a grocery market, simultaneously recognizing the appearance of people, shopping carts, and pasta is an example of a common diverse object classification task. Moreover, a useful visual-aid system would need deep classification capability to distinguish among the many styles and brands of pasta to direct attention to a particular box. Exemplar Support Vector Machines (ESVMs) provide a means of achieving this specificity, but are resource intensive as computation increases rapidly with the number of classes to be recognized. To maintain scalability without sacrificing accuracy, we examine the use of a biologically-inspired classifier (HMAX) as a front-end filter that can narrow the set of ESVMs to be evaluated. We show that a hierarchical classifier combining HMAX and ESVM performs better than either of the two individually. We achieve 12% improvement in accuracy over HMAX and 4% improvement over ESVM while reducing computational overhead of evaluating all possible exemplars.

关键词： image classification image filtering marketing object recognition support vector machines ESVM HMAX biologically-inspired classifier embedded visual-assist systems exemplar support vector machines grocery market multilevel filtering multilevel visual classifier object classification Accuracy Computational modeling computer architecture computer vision Feature extraction Training visualization image filtering computer Architecture visualization Support Vector Network Image classification Computational modeling images computer vision object recognition Feature extraction Classifiers Telemarketing Pasta Functional training

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Visual speech recognition using image moments and multiresolution wavelet images

Visual speech recognition using image moments and multiresol...

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international conference on computer graphics, imaging and Visualisation, CGIV'06

作者： Yau, Wai C. Kumar, Dinesh K. Arjunan, Sridhar P. Kumar, Sanjay School of Electrical and Computer Engineering RMIT University GPO Box 2476V Melbourne Vic. 3001 Australia

ISBN: (纸本)0769526063

This paper describes a new technique for recognizing speech using visual speech information. The video data of the speaker's mouth is represented using grayscale images named as motion history image (MHI). MHI is generated by applying accumulative image differencing on the frames of the video to implicitly represent the temporal information of the mouth movement. The MHIs are decomposed into wavelet sub images using Discrete Stationary Wavelet Transform (SWT). Three moment-based features (geometric moments, Zernike moments and Hu moments) are extracted from the SWT approximate sub images. Multilayer perceptron (MLP) type artificial neural network (ANN) with back propagation learning algorithm is used to classify the moments features. This paper evaluates and compares the image representation ability of the different moments. The initial experiments show that this method can classify English consonants with an error rate less than 5%. © 2006 IEEE.

关键词： Speech recognition

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Visual-interactive semi-supervised labeling of human motion capture data

Visual-interactive semi-supervised labeling of human motion ...

引用

visualization and Data Analysis 2017, VDA 2017

作者： Bernard, Jürgen Dobermann, Eduard Vögele, Anna Krüger, Björn Kohlhammer, Jörn Fellner, Dieter Technische Universität Darmstadt Germany Institute of Computer Graphics University of Bonn Germany Gokhale Method Institute StanfordCA United States Fraunhofer Institute for Computer Graphics Research IGD Darmstadt Germany

The characterization and abstraction of large multivariate time series data often poses challenges with respect to effectiveness or efficiency. Using the example of human motion capture data challenges exist in creating compact solutions that still reflect semantics and kinematics in a meaningful way. We present a visual-interactive approach for the semi-supervised labeling of human motion capture data. Users are enabled to assign labels to the data which can subsequently be used to represent the multivariate time series as sequences of motion classes. The approach combines multiple views supporting the user in the visual-interactive labeling process. Visual guidance concepts further ease the labeling process by propagating the results of supportive algorithmic models. The abstraction of motion capture data to sequences of event intervals allows overview and detail-on-demand visualizations even for large and heterogeneous data collections. The guided selection of candidate data for the extension and improvement of the labeling closes the feedback loop of the semi-supervised workflow. We demonstrate the effectiveness and the efficiency of the approach in two usage scenarios, taking visual-interactive learning and human motion synthesis as examples. © 2017, Society for imaging Science and Technology.

关键词： Efficiency

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computer Modeling of the Distribution of Pollutants in the Bed of the Volga River and the Akhtuba River 5

Computer Modeling of the Distribution of Pollutants in the B...

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5th international conference on Control Systems, Mathematical Modeling, Automation and Energy Efficiency, SUMMA 2023

作者： Baskakov, Eugenii Savin, Egor Kornaukhova, Mariya Volgograd State University Dept. Information Systems and Computer Modeling Volgograd Russia

ISBN: (纸本)9798350309126

The process of describing the distribution of impurities is described using two examples: phenomena in the bed of the Volga River in the northern section of the Volga-Akhtuba floodplain without a source under the influence of velocity fields and the flow of impurities from two sources. computer simulation is implemented on the basis of software developed using supercomputer technologies written using the CUDA software and hardware architecture. A mathematical model is proposed that describes the process of transfer of impurities in the aquatic environment. The process of developing and testing a software package is presented. The functionality of the created program allows you to predict the speed and range of propagation of various impurities in a continuous medium with a visual representation. The software package consists of two modules: calculation and visualization. The calculation module is implemented by transferring the computational load to the video card. The graphics module is implemented in Python. The results of numerical modeling of the distribution of pollutants in the Volga River bed are presented. The obtained result shows agreement with the real situation and the results of other researches. © 2023 IEEE.

关键词： Rivers

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Tomographic 4D reconstruction of gas flows in the presence of occluders

Tomographic 4D reconstruction of gas flows in the presence o...

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14th international conference on Vision, Modeling, and visualization, VMV 2009

作者： Berger, Kai Ihrke, Ivo Atcheson, Bradley Heidrich, Wolfgang Magnor, Marcus Computer Graphics Lab TU Braunschweig Imager Group UBC Vancouver Canada

ISBN: (纸本)9783980487481

We present a method that allows for reconstructing non-stationary, time-varying gas flows around moving objects. Our work extends the background oriented Schlieren tomography (3D-BOS) acquisition technique to capture gas flows also in the presence of occluding objects. An algorithm is presented that exploits the unique properties of BOS background patterns to robustly segment occluding objects. Numerical issues in the refractive index field reconstruction are addressed and successfully solved by the new method.

关键词： Flow of gases

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Cybermedicine - what is possible, and is it useful?

Cybermedicine - what is possible, and is it useful?

引用

international conference on Cyberworlds

作者： N.W. John School of Informatics University of Wales Bangor UK

The medical domain provides excellent opportunities for the application of computer graphics, visualization, and virtual environments, with the potential to help improve healthcare and bring benefits to patients. Possible applications include anatomical educational tools; patient education; diagnostic aids; virtual endoscopy; planning aids; guidance aids; skills training; and computer augmented reality. This talk provides a comprehensive overview of the state-of-the-art in this exciting field, including examples from research projects and commercially available products. The term cybermedicine was discussed and used to categorise those medical applications that can be delivered via the World Wide Web, preferably in the context of a collaborative virtual environment. The issues for effective cybermedicine was highlighted, and we will look ahead to future developments

关键词： Application software Virtual environment Medical services Medical diagnostic imaging computer graphics visualization computer science education Educational products Endoscopes Augmented reality

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Approximation of geometric structures with growing cell structures and growing neural gas a performance comparison

Approximation of geometric structures with growing cell stru...

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4th international Joint conference on Computational Intelligence, IJCCI 2012

作者： Annuth, Hendrik Bohn, Christian-A Computer Graphics and Virtual Reality Wedel University of Applied Sciences Feldstr. 143 Wedel Germany

ISBN: (纸本)9789898565334

We compare Growing Cell Structures and Growing Neural Gas, which were introduced by Bernd Fritzke and which are famous for their facilities in classification, clustering, dimensionality reduction, data visualization, and approximation tasks. We practically test and analyze their capabilities in geometric approximation and focusing on the application of surface reconstruction from 3D point-data. Our focus is to work out the differences of the algorithms that are especially relevant concerning approximation purposes. We address the issue of suitable input data, their applied graphs, their topological properties, their run time complexities and we present a summary of suggested alternations to both approaches and evaluate our results.

关键词： Cells

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Automatic generation of hair texture with line integral convolution

Automatic generation of hair texture with line integral conv...

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international conference on Information Visualisation (IV)

作者： Xiaoyang Mao M. Kikukawa K. Kashio A. Imamiya Department of Computer and Media Engineering Yamanashi University Japan

Synthesis of hair images is one of the most important and challenging computer graphics problems. We propose a new technique for automatically generating realistic human hair texture on 3D models of human characters. The idea is inspired by the similarity between the texture of human hair and the texture generated by the LIC algorithm. The proposed technique generates the texture of human hair using the vector field defining the directions of hair strands as the input to the 3D LIC algorithm.

关键词： Hair Convolution Humans Image generation Solid modeling computer graphics Character generation Rendering (computer graphics) Pixel Multimedia systems

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Parallelization of the Kriging Algorithm in Stochastic Simulation with GPU Accelerators 3rd

Parallelization of the Kriging Algorithm in Stochastic Simul...

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3rd Annual international conference on Geo-Informatics in Resource Management and Sustainable Ecosystem (GRMSE)

作者： Liu, Lin Wu, Chonglong Wang, Zhibo China Univ Geosci Inst Informat Technol 388 Lumo Rd Wuhan 430074 Peoples R China E China Inst Technol Software Inst Nanchang 430074 Peoples R China Wuhan Univ Int Sch Software Wuhan 430079 Peoples R China

ISBN: (纸本)9783662491553;9783662491546

3D realtime modeling places a heavy load on CPU. This paper presents a new method on 3D visualization in reservoir modeling system by using the computation power of modern programmable graphics hardware (GPU). The proposed scheme is devised to achieve parallel processing of massive reservoir logging data. By taking advantage of the GPU's parallel processing capability, moreover, the performance of our scheme is discussed in comparison with that of the implementation entirely running on CPU. Experimental results clearly show that the proposed parallel processing can remarkably accelerate the data clustering task. Especially, although data-transferring from GPU to CPU is generally costly, acceleration by GPU is significant to save the total execution time of data-clustering, and significantly alleviates the computing load on CPU.

关键词： Kriging algorithm Massive data Stochastic simulation graphics processing unit (GPU)

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Optimization of 3D Rendering by Simplification of Complicated Scene for Mobile Clients of Web Systems 7th

Optimization of 3D Rendering by Simplification of Complicate...

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7th international conference on Computational Collective Intelligence (ICCCI)

作者： Marek, Tomas Krejcar, Ondrej Univ Hradec Kralove Ctr Basic & Appl Res Fac Informat & Management Rokitanskeho 62 Hradec Kralove 50003 Czech Republic

ISBN: (纸本)9783319243061;9783319243054

computer graphics in combination with mobile devices find much use in the fields of entertainment, education and data displaying. The amount of information that is possible to provide to the user depends greatly on the optimization of graphic chain in the development of given application. There is a large area of web based software solutions where the speed and fluency of visualization and rendering are the most important parameters of user satisfaction when using of mobile client application. The important element is simplification of the scene by removing objects that are not currently visible. The methods that can be used as a solution for these problems are frustum culling, occlusion culling and level of detail. The work describes implementation of the first of mentioned methods on the Android platform and it includes a comparison of results from different devices when displaying a complicated 3D scene.

关键词： Mobile device Engine graphics Culling Optimization

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