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A new Potential-based SPH Method 一种新的基于电位的SPH方法
Spanish Computer Graphics Conference Pub Date : 2016-09-13 DOI: 10.2312/CEIG.20161315
J. J. Perea, Juan M. Cordero
{"title":"A new Potential-based SPH Method","authors":"J. J. Perea, Juan M. Cordero","doi":"10.2312/CEIG.20161315","DOIUrl":"https://doi.org/10.2312/CEIG.20161315","url":null,"abstract":"In Computer Graphics the fluid simulation plays a relevant role. Amongst the existing methods, the SPH method is highlighted by its simplicity, versatility and adaptability. Nevertheless, several research show some limitations that affect both the stability and the realism of simulation. These limitations are related with the calculation of the mass density and the pressure gradient, mainly when the number of neighbouring particles is low as boundary and discontinuities. Also, the simulation realism is compromised when the incompressibility constraint is enforced and the fluid heating is not dissipated. To overcome these limitations, we present a new technique to simulate the fluid flow. It involves of a hybrid technique that allow us to calculate a stable pressure gradient and the mass density even when the number of neighbouring particle is low. Also, we directly control the incompressibility and dissipate the fluid heating with accurate. Thus, we obtain stable and realistic fluid simulation, even with higher time steps.","PeriodicalId":385751,"journal":{"name":"Spanish Computer Graphics Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134523976","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
A Proposal of a Smart Mobility Framework for Serious Games 关于严肃游戏智能移动性框架的建议
Spanish Computer Graphics Conference Pub Date : 2016-09-13 DOI: 10.2312/CEIG.20161323
J. Jiménez-Pérez, F. Feito-Higueruela, Pedro J. Sánchez-Sánchez, José Ortega-Donaire, David Negrillo-Valdivia
{"title":"A Proposal of a Smart Mobility Framework for Serious Games","authors":"J. Jiménez-Pérez, F. Feito-Higueruela, Pedro J. Sánchez-Sánchez, José Ortega-Donaire, David Negrillo-Valdivia","doi":"10.2312/CEIG.20161323","DOIUrl":"https://doi.org/10.2312/CEIG.20161323","url":null,"abstract":"This paper has two main issues: smart cities and serious games. In this proposal we focus on smart mobility. Our aim is to build a multi-agent based framework to leverage the development of serious games in the context of smart mobility.","PeriodicalId":385751,"journal":{"name":"Spanish Computer Graphics Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132876501","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
Towards a 3D GIS for Underground Infrastructure 面向地下基础设施的三维GIS
Spanish Computer Graphics Conference Pub Date : 2016-09-13 DOI: 10.2312/CEIG.20161318
G. Soria, L. Ortega, F. Feito-Higueruela
{"title":"Towards a 3D GIS for Underground Infrastructure","authors":"G. Soria, L. Ortega, F. Feito-Higueruela","doi":"10.2312/CEIG.20161318","DOIUrl":"https://doi.org/10.2312/CEIG.20161318","url":null,"abstract":"The use of advanced software tools for groundwater management is essential to carry out the management of these underground infrastructure. Tools capable of accomplishing these processes are the so-called 3D GIS. However, these systems are not widely implemented, mainly because of their complexity. In this paper we present the data model of an underground infrastructure for city sanitation management. It discusses the design of the database, the acquisition and processing of such information, as well as the visualization and interaction with the resulting model.","PeriodicalId":385751,"journal":{"name":"Spanish Computer Graphics Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124136360","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
Real-Time Exploration of the Virtual Reconstruction of the Entrance of the Ripoll Monastery 里波尔修道院入口虚拟重建的实时探索
Spanish Computer Graphics Conference Pub Date : 2008-09-30 DOI: 10.2312/LocalChapterEvents/CEIG/CEIG08/219-224
I. Besora, P. Brunet, A. Chica, D. Morales, Jordi Moyés
{"title":"Real-Time Exploration of the Virtual Reconstruction of the Entrance of the Ripoll Monastery","authors":"I. Besora, P. Brunet, A. Chica, D. Morales, Jordi Moyés","doi":"10.2312/LocalChapterEvents/CEIG/CEIG08/219-224","DOIUrl":"https://doi.org/10.2312/LocalChapterEvents/CEIG/CEIG08/219-224","url":null,"abstract":"This paper presents the project of the virtual reconstruction and inspection of the \"Portalada\", the entrance of the Ripoll Monastery. In a first step, the monument of 7 x 11 meters was acquired using triangulation laser scanning technology, producing a dataset of more than 2000 range maps for a total of more than one billion triangles. After alignment and registration, a nearly complete digital model with 173M triangles and a sampling density of the \u0000order of one millimeter was produced and repaired. The paper describes the model acquisition and construction, the use of specific scalable algorithms for model repair and simplification, and then focuses on the design of a hierarchical data structure for data managing and view-dependent navigation of this huge dataset on a PC. Finally, the paper describes the setup for a usable, user-friendly and immersive system that induces a presence perception in the visitors.","PeriodicalId":385751,"journal":{"name":"Spanish Computer Graphics Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127837263","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: 7
Understanding Exposure for Reverse Tone Mapping 了解曝光反向色调映射
Spanish Computer Graphics Conference Pub Date : 2008-09-03 DOI: 10.2312/LocalChapterEvents/CEIG/CEIG08/189-197
Miguel Martin, R. Fleming, O. Sorkine-Hornung, D. Gutierrez
{"title":"Understanding Exposure for Reverse Tone Mapping","authors":"Miguel Martin, R. Fleming, O. Sorkine-Hornung, D. Gutierrez","doi":"10.2312/LocalChapterEvents/CEIG/CEIG08/189-197","DOIUrl":"https://doi.org/10.2312/LocalChapterEvents/CEIG/CEIG08/189-197","url":null,"abstract":"High dynamic range (HDR) displays are capable of providing a rich visual experience by boosting both luminance and contrast beyond what conventional displays can offer. We envision that HDR capture and display hardware will soon reach the mass market and become mainstream in most fields, from entertainment to scientific visualization. This will necessarily lead to an extensive redesign of the imaging pipeline. However, a vast amount of legacy content is available, captured and stored using the traditional, low dynamic range (LDR) pipeline. The immediate question that arises is: will our current LDR digital material be properly visualized on an HDR display? The answer to this question involves the process known as reverse tone mapping (the expansion of luminance and contrast to match those of the HDR display) for which no definite solution exists. This paper studies the specific problem of reverse tone mapping for imperfect legacy still images, where some regions are under- or overexposed. First, we show the results of a psychophysical study compared with first-order image statistics, in an attempt to gain some understanding in what makes an image be perceived as incorrectly exposed; second, we propose a methodology to evaluate existing reverse tone mapping algorithms in the case of imperfect legacy content.","PeriodicalId":385751,"journal":{"name":"Spanish Computer Graphics Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128800336","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: 15
Técnicas para Visualización de lluvia en Entornos Virtuales 虚拟环境中的降雨可视化技术
Spanish Computer Graphics Conference Pub Date : 1900-01-01 DOI: 10.2312/LocalChapterEvents/CEIG/CEIG08/159-167
Anna Puig-Centelles, O. Ripolles, Miguel Chover
{"title":"Técnicas para Visualización de lluvia en Entornos Virtuales","authors":"Anna Puig-Centelles, O. Ripolles, Miguel Chover","doi":"10.2312/LocalChapterEvents/CEIG/CEIG08/159-167","DOIUrl":"https://doi.org/10.2312/LocalChapterEvents/CEIG/CEIG08/159-167","url":null,"abstract":"","PeriodicalId":385751,"journal":{"name":"Spanish Computer Graphics Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124821098","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
Computing Curvature Information on 3D Meshes from Cultural Heritage Artifacts 文物三维网格曲率信息的计算
Spanish Computer Graphics Conference Pub Date : 1900-01-01 DOI: 10.2312/LocalChapterEvents/CEIG/CEIG12/163-163
L. López, J. Torres, Francisco Ortin
{"title":"Computing Curvature Information on 3D Meshes from Cultural Heritage Artifacts","authors":"L. López, J. Torres, Francisco Ortin","doi":"10.2312/LocalChapterEvents/CEIG/CEIG12/163-163","DOIUrl":"https://doi.org/10.2312/LocalChapterEvents/CEIG/CEIG12/163-163","url":null,"abstract":"The curvature provides essential information about the features of a object surface. This poster presents an operation that makes it possible to generate the curvature information in the CHiSEL system.","PeriodicalId":385751,"journal":{"name":"Spanish Computer Graphics Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114546765","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
Simulador de realidad virtual para la formación de operadores de grúa Torre 用于塔式起重机操作员培训的虚拟现实模拟器
Spanish Computer Graphics Conference Pub Date : 1900-01-01 DOI: 10.2312/LocalChapterEvents/CEIG/CEIG09/037-046
Miguel Ángel Gamón-Giménez, Marta Pla-Castells, Ignacio García-Fernández, Alejandro Reyes-Lacueva, Rafael J. Martínez-Durá
{"title":"Simulador de realidad virtual para la formación de operadores de grúa Torre","authors":"Miguel Ángel Gamón-Giménez, Marta Pla-Castells, Ignacio García-Fernández, Alejandro Reyes-Lacueva, Rafael J. Martínez-Durá","doi":"10.2312/LocalChapterEvents/CEIG/CEIG09/037-046","DOIUrl":"https://doi.org/10.2312/LocalChapterEvents/CEIG/CEIG09/037-046","url":null,"abstract":"La utilizacion de simuladores basados en realidad virtual proporciona una solucion a los diferentes inconvenientes del entrenamiento de operadores de maquinaria pesada. Entre las ventajas aportadas al ambito de formacion, se encuentran la reduccion de riesgos laborales y costes economicos, el incremento en la productividad, y la utilizacion como herramienta objetiva de evaluacion. Este articulo presenta un sistema instruccional basado en simulacion para el entrenamiento de operadores de grua Torre. Este simulador destaca por su enfoque formativo mediante la inclusion de material docente interactivo, el aprendizaje en la maniobrabilidad de una grua Torre a traves de un conjunto de ejercicios y circuitos de entrenamiento, y la utilizacion de tecnicas de realidad virtual del estado del arte (como shaders de iluminacion, tecnicas de sombreado y avatares cooperativos) que incrementan la experiencia de realismo obtenida. Se describe la arquitectura que compone el simulador, el diseno del entorno virtual basado en OpenSceneGraph, el sistema de autoevaluacion, y las caracteristicas de realismo del modelo dinamico de la grua, como son la influencia del viento y las colisiones de los cables con otros objetos del entorno virtual. El sistema se complementa con un puesto de instructor que facilita el control, la evaluacion, y la monitorizacion de los puestos de entrenamiento de un aula multipuesto.","PeriodicalId":385751,"journal":{"name":"Spanish Computer Graphics Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129636860","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
Comparison of GPU-based Methods for Handling Point Cloud Occlusion 基于gpu的点云遮挡处理方法比较
Spanish Computer Graphics Conference Pub Date : 1900-01-01 DOI: 10.2312/ceig.20211364
Alfonso López Ruiz, J. Jurado, Emilio J. Padrón, C. Ogáyar, F. Feito-Higueruela
{"title":"Comparison of GPU-based Methods for Handling Point Cloud Occlusion","authors":"Alfonso López Ruiz, J. Jurado, Emilio J. Padrón, C. Ogáyar, F. Feito-Higueruela","doi":"10.2312/ceig.20211364","DOIUrl":"https://doi.org/10.2312/ceig.20211364","url":null,"abstract":"Three-dimensional point clouds have conventionally been used along with several sources of information. This fusion can be performed by projecting the point cloud into the image plane and retrieving additional data for each point. Nevertheless, the raw projection omits the occlusion caused by foreground surfaces, thus assigning wrong information to 3D points. For large point clouds, testing the occlusion of each point from every viewpoint is a time-consuming task. Hence, we propose several algorithms implemented in GPU and based on the use of z-buffers. Given the size of nowadays point clouds, we also adapt our methodologies to commodity hardware by splitting the point cloud into several chunks. Finally, we compare their performance through the response time. CCS Concepts • Computing methodologies → Massively parallel algorithms; Visibility; Point-based models;","PeriodicalId":385751,"journal":{"name":"Spanish Computer Graphics Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129101094","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
Representación de Volúmenes mediante Agrupación de Tetraedros para la Extracción de Isosuperficies 用于提取等表面的四面体分组表示体积
Spanish Computer Graphics Conference Pub Date : 1900-01-01 DOI: 10.2312/LocalChapterEvents/CEIG/CEIG08/085-093
Francisco Ortin, Francisco Velasco, Alejandro León
{"title":"Representación de Volúmenes mediante Agrupación de Tetraedros para la Extracción de Isosuperficies","authors":"Francisco Ortin, Francisco Velasco, Alejandro León","doi":"10.2312/LocalChapterEvents/CEIG/CEIG08/085-093","DOIUrl":"https://doi.org/10.2312/LocalChapterEvents/CEIG/CEIG08/085-093","url":null,"abstract":"La extracción de isosuperficies mediante el uso del algoritmo de Marching Cubes es uno de los métodos habitua-les en la visualización de volúmenes representados a través de un retículo o grid regular de datos. Sin embargo, este algoritmo produce algunas ambigüedades que han sido resueltas mediante diferentes aproximaciones impli-cando normalmente un proceso complejo. Velasco et al. proponen una tetraedrización adaptativa basada en el comportamiento de la función trilineal dentro de las celdas del modelo que resuelve estas ambigüedades. Dicha tetraedrización es independiente del valor de umbral utilizado y permite preservar la correcta topología de la función trilineal en la isosuperficie aproximada. Además, la transición entre las diferentes configuraciones con ambigüedad ocurre de forma suave frente a cambios en el valor umbral. En este trabajo se propone una partición en poliedros basada en dicha tetraedrización y un diseño para la representación de datos de la malla obtenida. Esta estructura permite reducir considerablemente el número de poliedros obtenidos,","PeriodicalId":385751,"journal":{"name":"Spanish Computer Graphics Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114064465","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
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