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A project for hand gesture recognition

A project for hand gesture recognition

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brazilian symposium on computer graphics and image processing (sibgrapi)

作者： C.R.P. Dionisio R.M. Cesar Department of Computer Science University of Sao Paulo Sao Paulo Brazil

this paper discusses an ongoing project for hand gesture recognition in computer vision systems. the proposed approach is based on the shape analysis tools introduced by R.M. Cesar Jr. and L. da F. Costa (1997). More specifically, the wavelet transform is used to generate features for the recognition of hand gestures based on contours.

关键词： Algorithm design and analysis Continuous wavelet transforms Shape Wavelet transforms image analysis Feature extraction computer science computer vision Man machine systems Deafness

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Head motion tracking using facial image analysis applied to 3D-environment navigation

Head motion tracking using facial image analysis applied to ...

引用

brazilian symposium on computer graphics and image processing (sibgrapi)

作者： C.B.F. Marques L.V. Souza L.C.G. Andrade M.F.M. Campos DCC/ICEx/UFMG Computer Science Department of the Exact Science Institute of the Federal University of Minas Gerais Belo Horizonte Minas Gerais Brazil

this paper describes a head motion tracking method based on an image processing and spatial information extraction algorithm that is capable of obtaining the key elements of the user's face and, afterwards, charac... 详细信息

关键词： Head Motion analysis Tracking image motion analysis Navigation image processing Data mining Mobile robots Eyes Mouth

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Old movie restoration using opening by surface

Old movie restoration using opening by surface

引用

brazilian symposium on computer graphics and image processing (sibgrapi)

作者： S.J.F. Guimaraes A. De Albuquerque Araujo G. Cerqueira Departamento de Ciência da Computacao NPDI/DCC/UFMG Belo Horizonte Minas Gerais Brazil

Because of their storage conditions, old movies may present different defect types of different shapes and sizes. We propose a method for old movie restoration using opening by surface which eliminates image informati... 详细信息

关键词： Motion pictures Surface morphology Shape Surface reconstruction image restoration image reconstruction History image sequences Pixel Motion detection

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On reconstructing surfaces with genus greater than zero from range images

On reconstructing surfaces with genus greater than zero from...

引用

brazilian symposium on computer graphics and image processing (sibgrapi)

作者： M.R.G. Marquez Wu Shin-Ting DCA-Faculty of Electrical and Computer Engineering State University of Campinas Sao Paulo Brazil Universidade Estadual de Campinas Campinas SP BR

the algorithm radial flow model can generate a 3D closed triangular mesh which fits an unregistered range image. though complex meshes may be produced, they are restricted to be homeomorph to spheres. We present some ... 详细信息

关键词： image reconstruction Surface reconstruction Surges Topology Deformable models Mesh generation Robustness Watches Vectors Strips

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Adaptive filters for image processing based on artificial neural networks

Adaptive filters for image processing based on artificial ne...

引用

brazilian symposium on computer graphics and image processing (sibgrapi)

作者： J.R. Bittencourt F.S. Osorio Univ. do Vale do Rio dos Sinos Sao Lepoldo Brazil UNISINOS Universidade do Vale do Rio dos Sinos Sao Leopoldo Rio Grande do Sul Brazil

the paper presents our research in image processing (filters used for edge detection, color transformation, and distortion correction) using artificial neural networks. We have developed a tool, Neuron Color, in order... 详细信息

关键词： Adaptive filters image processing Artificial neural networks image edge detection Color Neural networks Neurons Gray-scale Usability Java

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Construction of multiuser virtual environments for the virtual teaching of embryology

Construction of multiuser virtual environments for the virtu...

引用

brazilian symposium on computer graphics and image processing (sibgrapi)

作者： S. De Abreu R.B. De Araujo A.L. Battaiola Departamento de Computação Universidade Federal de São Carlos Sao Paulo Brazil

the paper describes the construction process of multiuser virtual environments, VE integrated with multimedia for the virtual teaching of embryology. the system is supported by the MPEG-4 standard and will be integrated, as experimentation environments, to a virtual course on embryology, which is being built and will be made available as part of the embryology course for medical students.

关键词： Education Embryo MPEG 4 Standard Microscopy Visualization Virtual environment Biomedical imaging Books computer science Birds

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Parallelization of ARTUR algorithm using PVM

Parallelization of ARTUR algorithm using PVM

引用

brazilian symposium on computer graphics and image processing (sibgrapi)

作者： G.J. Fernandez J. Jacobo-Berlles M. Bauza P. Borensztein M. Mejail Universidad de Buenos Aires Buenos Aires AR Departamento De Computación-fceyn Universidad de Buenos Aires Argentina

the algorithms based on Markov random fields (MRF), used for restoring images affected by blur and noise are usually effective, but also computationally very heavy. In this work, a parallelization of the ARTUR algorit... 详细信息

关键词： image restoration Jacobian matrices Virtual machining Master-slave Markov random fields Additive noise Gaussian noise Degradation Minimization methods image generation

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computerized tomography image compression: FIC/spl times/WTC

Computerized tomography image compression: FIC/spl times/WTC

引用

brazilian symposium on computer graphics and image processing (sibgrapi)

作者： R. Pizzio P.R.G. Franco Departamento de Informática PUCRS Uruguaiana Rio Grande do Sul Brazil Departamento de Engenharia Elétrica PUCRS-Campus Central Porto Alegre Rio Grande do Sul Brazil

Studies the advantages and disadvantages of fractal image compression (FlC) compared to wavelet transform compression (WTC). Our results indicate that there is an advantage in FIC for high compression ratios when we take the image quality into account. Considering the compression speed we have a significant difference, which indicates that WTC is much faster than FIC.

关键词： Computed tomography image coding PSNR Fractals image quality image analysis Biomedical imaging Wavelet transforms graphics Wavelet analysis

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Variable resolution 4-k meshes

Variable resolution 4-k meshes

引用

brazilian symposium on computer graphics and image processing (sibgrapi)

作者： L. Velho J. Gomes IMPA-Instituto de Matemática Pura e Aplicada Brazil

We introduce variable resolution 4-k meshes, a powerful structure for the representation of geometric objects at multiple levels of detail. It combines most properties of other related descriptions with several advantages, such as more flexibility and greater expressive power. the main unique feature of the 4-k mesh structure lies in its variable resolution capability, which is crucial for adaptive computation. We also give an overview of the different methods for constructing the hierarchical 4-k mesh representation, as well as the basic algorithms necessary to incorporate it in modeling and graphics applications.

关键词： Humans Application software Solid modeling computer graphics Visualization

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Morphological cursive word segmentation

Morphological cursive word segmentation

引用

brazilian symposium on computer graphics and image processing (sibgrapi)

作者： L.R. Veloso R.P. Sousa J.M. De Carvalho Departament of Electrical Engineering University Federal da Paraiba Campina Grande Paraiba Brazil

the work describes a new algorithm for segmentation of handwritten cursive words, based on the following two hypotheses: 1) natural segmentation points (SPs) exist corresponding to disconnected characters; and 2) the physical SPs between connected characters are located in ligatures. the morphological operations of opening and closing are utilized in the determination of word ligatures. A genetic algorithm was employed in the search for the optimum structuring element to determine ligatures.

关键词： Biological cells Morphological operations Genetic algorithms Cost function image segmentation Algorithm design and analysis Histograms Instruction sets Bridges

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