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Proceedings X Brazilian Symposium on Computer Graphics and Image Processing最新文献

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An architecture for motion capture based animation 一个基于动作捕捉的动画架构
Proceedings X Brazilian Symposium on Computer Graphics and Image Processing Pub Date : 1997-10-14 DOI: 10.1109/SIGRA.1997.625148
F.W. Da Silva, L. Velho, P. R. Cavalcanti, J. Gomes
{"title":"An architecture for motion capture based animation","authors":"F.W. Da Silva, L. Velho, P. R. Cavalcanti, J. Gomes","doi":"10.1109/SIGRA.1997.625148","DOIUrl":"https://doi.org/10.1109/SIGRA.1997.625148","url":null,"abstract":"The paper proposes an architecture for motion capture based animation systems, which works with several data formats and uses the building block paradigm for motion processing operations. Also, a user interface is proposed to perform an intuitive visualization of the animation main elements. A prototype system has been implemented, based on the presented concepts, and its operation is discussed.","PeriodicalId":445648,"journal":{"name":"Proceedings X Brazilian Symposium on Computer Graphics and Image Processing","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116454749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 19
Morphological approach for template matching 模板匹配的形态学方法
Proceedings X Brazilian Symposium on Computer Graphics and Image Processing Pub Date : 1997-10-14 DOI: 10.1109/SIGRA.1997.625169
G. Banon, S. Faria
{"title":"Morphological approach for template matching","authors":"G. Banon, S. Faria","doi":"10.1109/SIGRA.1997.625169","DOIUrl":"https://doi.org/10.1109/SIGRA.1997.625169","url":null,"abstract":"In this work, a morphological representation of a template matching algorithm for gray-scale images is presented. The algorithm is the composition of the so-called template matching operator with the maximum gray-level location operator, which can be both expressed in terms of the following classes of mathematical morphology elementary operators: dilations, erosions and anti-dilations. Moreover, the algorithm is applied to remote sensing images.","PeriodicalId":445648,"journal":{"name":"Proceedings X Brazilian Symposium on Computer Graphics and Image Processing","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130308000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 23
Representation of conics in the oriented projective plane 有向投影平面上圆锥曲线的表示
Proceedings X Brazilian Symposium on Computer Graphics and Image Processing Pub Date : 1997-10-14 DOI: 10.1109/SIGRA.1997.625151
G. A. Pinto, P. D. de Rezende
{"title":"Representation of conics in the oriented projective plane","authors":"G. A. Pinto, P. D. de Rezende","doi":"10.1109/SIGRA.1997.625151","DOIUrl":"https://doi.org/10.1109/SIGRA.1997.625151","url":null,"abstract":"We present a geometric definition of conic sections in the oriented projective plane and describe some of their nice properties. This definition leads to a very simple and unambiguous representation for affine conics and conic arcs. A conic (of any type) is represented by the homogeneous coordinates of its foci and one point on it, hence, the metric plays a major role in this case as opposed to the traditional algebraic characterization of conics as second degree polynomial curves. This representation is particularly suitable for the implementation of geometric solutions of problems that involve the concept of distance. Furthermore, we discuss point location with respect to conic curves which constitutes an important elementary operation for the solution of many such problems.","PeriodicalId":445648,"journal":{"name":"Proceedings X Brazilian Symposium on Computer Graphics and Image Processing","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128340979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Working with remote VRML scenes through low-bandwidth connections 通过低带宽连接处理远程VRML场景
Proceedings X Brazilian Symposium on Computer Graphics and Image Processing Pub Date : 1997-10-14 DOI: 10.1109/SIGRA.1997.625145
A. Raposo, L. P. Magalhães, I. Ricarte
{"title":"Working with remote VRML scenes through low-bandwidth connections","authors":"A. Raposo, L. P. Magalhães, I. Ricarte","doi":"10.1109/SIGRA.1997.625145","DOIUrl":"https://doi.org/10.1109/SIGRA.1997.625145","url":null,"abstract":"We have developed a Web based application to accelerate the visualization of VRML scenes located in a remote server. This application enables the user to extract only the parts of a scene that are of actual interest. The extracted parts represent one or more sub trees of the hierarchical structure of the VRML scene, and only these parts will be rendered and visualized in the local computer. By reducing the complexity (size) of the remote scene, less data are transmitted from the remote server and the rendering process becomes faster in the local computer. The application is written in Java and is executed as an applet embedded in an HTML page.","PeriodicalId":445648,"journal":{"name":"Proceedings X Brazilian Symposium on Computer Graphics and Image Processing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131740186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
A hierarchical skeleton-based implicit model 一个基于层级骨架的隐式模型
Proceedings X Brazilian Symposium on Computer Graphics and Image Processing Pub Date : 1997-10-14 DOI: 10.1109/SIGRA.1997.625150
M. Malheiros, Wu Shin-Ting
{"title":"A hierarchical skeleton-based implicit model","authors":"M. Malheiros, Wu Shin-Ting","doi":"10.1109/SIGRA.1997.625150","DOIUrl":"https://doi.org/10.1109/SIGRA.1997.625150","url":null,"abstract":"Implicit modeling is a recent trend in computer graphics and a variety of skeleton based models have been proposed. We present a hierarchical framework that can encompass a wide range of these variants, providing a more flexible way for defining the shape of implicit objects. We also derive a new decay function, which is computationally cheap.","PeriodicalId":445648,"journal":{"name":"Proceedings X Brazilian Symposium on Computer Graphics and Image Processing","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123681609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
A user-friendly system for synthetic aperture radar image classification based on grayscale distributional properties and context 基于灰度分布特性和上下文的合成孔径雷达图像分类系统
Proceedings X Brazilian Symposium on Computer Graphics and Image Processing Pub Date : 1997-10-14 DOI: 10.1109/SIGRA.1997.625180
A. Frery, C.daC.F. Yanasse, P. R. Vieira, S.J.S. Santanna, C. Rennó
{"title":"A user-friendly system for synthetic aperture radar image classification based on grayscale distributional properties and context","authors":"A. Frery, C.daC.F. Yanasse, P. R. Vieira, S.J.S. Santanna, C. Rennó","doi":"10.1109/SIGRA.1997.625180","DOIUrl":"https://doi.org/10.1109/SIGRA.1997.625180","url":null,"abstract":"The purpose of this paper is to present a system for the analysis and classification of Synthetic Aperture Radar (SAR) images. This system, unlike most of its competitors, allows a careful modeling of the statistical properties of the data beyond the usual Gaussian hypothesis. The modeling tools include basic descriptive measures and the choice of suited distributions, through goodness-of-fit tests, to model the data. The classification tools offer the choice between pointwise and contextual (Markovian) techniques, and the quantitative assessment of the quality of the results. The system is goal-driven, and its interfaces are solely based on pull-down menus; the user is prompted with the correct sequence of operations, whenever an invalid option is invoked. An example of the use of this system for the classification of a SAR image is presented.","PeriodicalId":445648,"journal":{"name":"Proceedings X Brazilian Symposium on Computer Graphics and Image Processing","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122395752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 16
An algorithm for the visualization of a terrain with objects 一种用物体显示地形的算法
Proceedings X Brazilian Symposium on Computer Graphics and Image Processing Pub Date : 1997-10-14 DOI: 10.1109/SIGRA.1997.625155
F. Szenberg, M. Gattass, P. Carvalho
{"title":"An algorithm for the visualization of a terrain with objects","authors":"F. Szenberg, M. Gattass, P. Carvalho","doi":"10.1109/SIGRA.1997.625155","DOIUrl":"https://doi.org/10.1109/SIGRA.1997.625155","url":null,"abstract":"The article describes a method for object and terrain visualization by means of the combination of two algorithms, one for terrain data and one for objects. Our purpose is to generate, efficiently and rapidly, aerial images of terrain with objects such as houses, vehicles, and transmission lines, thus allowing a simulated flight. For the objects, described by lines and polygons, the Z-Buffer algorithm is used; for the terrain, described by height maps, an optimized ray casting algorithm, called Floating Horizon Algorithm, is used.","PeriodicalId":445648,"journal":{"name":"Proceedings X Brazilian Symposium on Computer Graphics and Image Processing","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126123205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
Novel automatic PCB inspection technique based on connectivity 基于连通性的新型PCB自动检测技术
Proceedings X Brazilian Symposium on Computer Graphics and Image Processing Pub Date : 1997-10-14 DOI: 10.1109/SIGRA.1997.625174
M. Tatibana, R. Lotufo
{"title":"Novel automatic PCB inspection technique based on connectivity","authors":"M. Tatibana, R. Lotufo","doi":"10.1109/SIGRA.1997.625174","DOIUrl":"https://doi.org/10.1109/SIGRA.1997.625174","url":null,"abstract":"This paper presents a novel technique for PCB inspection based on the comparison of the Connected Table of a Reference and a Test Image. The method is based on connected component analysis, which is a natural way to extract the connectivity information of the conductors of a PCB. The registration of the PCB holes, which is a common problem related to referential model techniques, is solved by the concept of zone of influence of each hole. This paper describes the method and its implementation using standard Morphology Image Processing techniques. A result of applying the technique to real images is shown.","PeriodicalId":445648,"journal":{"name":"Proceedings X Brazilian Symposium on Computer Graphics and Image Processing","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115105886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 31
Color image quantization by pairwise clustering 彩色图像的两两聚类量化
Proceedings X Brazilian Symposium on Computer Graphics and Image Processing Pub Date : 1997-10-14 DOI: 10.1109/SIGRA.1997.625178
L. Velho, J. Gomes, M.V.R. Sobreiro
{"title":"Color image quantization by pairwise clustering","authors":"L. Velho, J. Gomes, M.V.R. Sobreiro","doi":"10.1109/SIGRA.1997.625178","DOIUrl":"https://doi.org/10.1109/SIGRA.1997.625178","url":null,"abstract":"This paper presents a new quantization method for color images. It uses a local error optimization strategy to generate near optimal quantization levels. The algorithm is simple to implement and produces results that are superior than those of other popular image quantization algorithms.","PeriodicalId":445648,"journal":{"name":"Proceedings X Brazilian Symposium on Computer Graphics and Image Processing","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133225705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 66
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