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

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An interactive system for the visualization and measurement extraction in medical images 用于医学图像可视化和测量提取的交互式系统
Proceedings. XV Brazilian Symposium on Computer Graphics and Image Processing Pub Date : 1900-01-01 DOI: 10.1109/SIBGRA.2002.1167203
M. Machado de Carvalho, R. Melo Czekster, I. Harb Manssour
{"title":"An interactive system for the visualization and measurement extraction in medical images","authors":"M. Machado de Carvalho, R. Melo Czekster, I. Harb Manssour","doi":"10.1109/SIBGRA.2002.1167203","DOIUrl":"https://doi.org/10.1109/SIBGRA.2002.1167203","url":null,"abstract":"The visualization of medical images, e.g. Computed Tomography (CT) and Magnetic Resonance Imaging (MRI), and the utilization of measurement tools to define distances, areas and volumes are very important to health professionals. The quantitative analysis of spatial relations among structures is useful for medical diagnosis. This work describes a visualization system that provides interactive measurement tools. MRI images acquired from a phantom were used to increase system accuracy.","PeriodicalId":286814,"journal":{"name":"Proceedings. XV Brazilian Symposium on Computer Graphics and Image Processing","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121798806","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: 0
Medial axes neuronal codification in topographical maps 地形图中的内轴神经元编码
Proceedings. XV Brazilian Symposium on Computer Graphics and Image Processing Pub Date : 1900-01-01 DOI: 10.1109/SIBGRA.2002.1167190
L. da F Costa
{"title":"Medial axes neuronal codification in topographical maps","authors":"L. da F Costa","doi":"10.1109/SIBGRA.2002.1167190","DOIUrl":"https://doi.org/10.1109/SIBGRA.2002.1167190","url":null,"abstract":"A simple neuronal model for medial axes codification in biological vision systems is presented which is based on the concept of the propagation of wavefronts along topographically organized cortical structures.","PeriodicalId":286814,"journal":{"name":"Proceedings. XV Brazilian Symposium on Computer Graphics and Image Processing","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114945877","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: 0
A region-based object recognition algorithm 一种基于区域的目标识别算法
Proceedings. XV Brazilian Symposium on Computer Graphics and Image Processing Pub Date : 1900-01-01 DOI: 10.1109/SIBGRA.2002.1167156
P. Sergio Rodrigues, A. de Albuquerque Araújo
{"title":"A region-based object recognition algorithm","authors":"P. Sergio Rodrigues, A. de Albuquerque Araújo","doi":"10.1109/SIBGRA.2002.1167156","DOIUrl":"https://doi.org/10.1109/SIBGRA.2002.1167156","url":null,"abstract":"This paper presents a new algorithm for recognition of objects in a given image. This algorithm transforms the input image into a directed graph which is constructed through several defined rules. The graph characteristics represent the global shape information of the object inside the input image, and are extracted during graph construction. This strategy prevents the postprocessing traversing to the graph, with consequent improvement of computational time. The algorithm was tested over a specific database, and the experiments were conducted to show its performance in the light of two types of problem: object class recognition and similar image retrieval.","PeriodicalId":286814,"journal":{"name":"Proceedings. XV Brazilian Symposium on Computer Graphics and Image Processing","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116092752","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: 5
Neural cells synthesis using L-System 利用L-System合成神经细胞
Proceedings. XV Brazilian Symposium on Computer Graphics and Image Processing Pub Date : 1900-01-01 DOI: 10.1109/SIBGRA.2002.1167201
O. Vargas Jaques, R. Celia Coelho
{"title":"Neural cells synthesis using L-System","authors":"O. Vargas Jaques, R. Celia Coelho","doi":"10.1109/SIBGRA.2002.1167201","DOIUrl":"https://doi.org/10.1109/SIBGRA.2002.1167201","url":null,"abstract":"This paper presents the generation of realistic morphologically neural cells employing a modified L-System. These grammars incorporate functions that refer to the morphological features extracted from natural cells (e.g. branch dendritic, angle and size). A parser is used to generate the neural cells, which can be viewed by a 3D visualization software specifically developed to show the branching structures.","PeriodicalId":286814,"journal":{"name":"Proceedings. XV Brazilian Symposium on Computer Graphics and Image Processing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116293167","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: 0
Workspace awareness in relaxed WYSIWIS systems 在宽松的WYSIWIS系统中的工作空间感知
Proceedings. XV Brazilian Symposium on Computer Graphics and Image Processing Pub Date : 1900-01-01 DOI: 10.1109/SIBGRA.2002.1167140
Wu Shin-Ting, L.G. Da Silveira
{"title":"Workspace awareness in relaxed WYSIWIS systems","authors":"Wu Shin-Ting, L.G. Da Silveira","doi":"10.1109/SIBGRA.2002.1167140","DOIUrl":"https://doi.org/10.1109/SIBGRA.2002.1167140","url":null,"abstract":"CoMo is a prototype of a collaborative 3D geometric modeling environment designed to support temporally and geographically dispersed work teams. In this environment participants may work in different parts of the space and have distinct perspective viewing of the space. Maintaining workspace awareness, therefore, becomes much more difficult. In this paper we present graphics solutions we adopted for enhancing 3D workspace awareness in CoMo. We reused several individual awareness mechanisms provided by the MTK graphics library designed for single-user applications. An appropriate communication and distribution platform for coordinating individual actions was devised. The main contribution of this paper is to show how group awareness can be implemented by adequately reusing existing individual awareness facilities.","PeriodicalId":286814,"journal":{"name":"Proceedings. XV Brazilian Symposium on Computer Graphics and Image Processing","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123443416","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: 1
Image processing and analysis to diagnose ocular refraction errors 影像处理与分析诊断眼部屈光不正
Proceedings. XV Brazilian Symposium on Computer Graphics and Image Processing Pub Date : 1900-01-01 DOI: 10.1109/SIBGRA.2002.1167171
A. Valerio Netto, M. D. de Oliveira
{"title":"Image processing and analysis to diagnose ocular refraction errors","authors":"A. Valerio Netto, M. D. de Oliveira","doi":"10.1109/SIBGRA.2002.1167171","DOIUrl":"https://doi.org/10.1109/SIBGRA.2002.1167171","url":null,"abstract":"We describe ongoing research into the development of a functional system for diagnosing and measuring ocular refractive errors in the human eye (astigmatism, hypermetropia and myopia) by automatically analyzing images of the human ocular globe acquired with the Hartmann-Shack (H-S) technique. H-S images are to be input into a system capable of recognizing the presence of a refractive error and outputting a measurement of such an error. Because the H-S technique provides images rich with information on the human eye, we believe this system may provide a framework that can be extended to obtain additional information on the health of imaged ocular globes.","PeriodicalId":286814,"journal":{"name":"Proceedings. XV Brazilian Symposium on Computer Graphics and Image Processing","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125492050","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: 0
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