Spanish Computer Graphics Conference最新文献

{"title":"CAVAST: The Crows Animation, Visualization, and Simulation Testbed","authors":"A. Beacco, N. Pelechano","doi":"10.2312/ceig.20141108","DOIUrl":"https://doi.org/10.2312/ceig.20141108","url":null,"abstract":"Simulation, animation and rendering of crowds has become an important part of real-time applications such as videogames. Virtual environments achieve higher realism when being populated by virtual crowds as opposed to appearing uninhabited. There has been a large amount of research on simulation, animation and rendering of crowds, but in most cases they seem to be treated separately as if the limitations in one area did not affect the others. At the end of the day the goal is to populate environments with as many characters as possible in real \u0000time, and it is of little use if one can for instance render thousands of characters in real time, but you cannot move more than a hundred due to a simulation bottleneck. The goal of our work is to provide a framework that lets the \u0000researcher focus on each of these topics at a time (simulation, animation, or rendering) and be able to explore and push the boundaries on one topic without being strongly limited by the other related issues. This paper presents therefore a new prototyping testbed for crowds that lets the researcher focus on one of these areas of research at a time without loosing sight of the others. We offer default representations, animation and simulation controllers for real time crowd simulation, that can easily be replaced or extended. Fully configurable level-of-detail for both rendering and simulation is also available","PeriodicalId":385751,"journal":{"name":"Spanish Computer Graphics Conference","volume":"561 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":"123920796","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}

{"title":"Animación de Actores Virtuales: Expresión de Emociones Mediante Lenguaje Corporal","authors":"A. Guedes, Sandra Baldassarri, Eva Cerezo","doi":"10.2312/LocalChapterEvents/CEIG/CEIG08/245-248","DOIUrl":"https://doi.org/10.2312/LocalChapterEvents/CEIG/CEIG08/245-248","url":null,"abstract":"Para lograr que los personajes sinteticos resulten mas creibles y con un comportamiento mas natural para el usuario, en este articulo se aborda el problema de la expresion de las emociones, centrandose en el lenguaje corporal. El sistema desarrollado permite la sintesis corporal de seis emociones basicas: enfado, disgusto, miedo, alegria, tristeza y sorpresa, y no se limita a un ambito o entorno especifico.","PeriodicalId":385751,"journal":{"name":"Spanish Computer Graphics Conference","volume":"4 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":"121414806","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}

{"title":"Locally-Adaptive Texture Compression","authors":"C. Andújar, Jonàs Martínez","doi":"10.2312/LocalChapterEvents/CEIG/CEIG09/105-114","DOIUrl":"https://doi.org/10.2312/LocalChapterEvents/CEIG/CEIG09/105-114","url":null,"abstract":"Current schemes for texture compression fail to exploit spatial coherence in an adaptive manner due to the strict efficiency constraints imposed by GPU-based, fragment-level decompression. In this paper we present a texture compression framework for quasi-lossless, locally-adaptive compression of graphics data. Key elements include a Hilbert scan to maximize spatial coherence, efficient encoding of homogeneous image regions through arbitrarily-sized texel runs, a cumulative run-length encoding supporting fast random-access, and a compression algorithm suitable for fixed-rate and variable-rate encoding. Our scheme can be easily integrated into the rasterization pipeline of current programmable graphics hardware allowing real-time GPU decompression. We show that our scheme clearly outperforms competing approaches such as S3TC DXT1 on a large class of images with some degree of spatial coherence. Unlike other proprietary formats, our scheme is suitable for compression of any graphics data including color maps, shadow maps and relief maps. We have observed compression rates of up to 12:1, with minimal or no loss in visual quality and a small impact on rendering time.","PeriodicalId":385751,"journal":{"name":"Spanish Computer Graphics Conference","volume":"31 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":"125120325","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}

{"title":"Management of 3D Geometry on Portable Devices","authors":"José Olmos Martínez, F. Ramos, Carlos González","doi":"10.2312/LocalChapterEvents/CEIG/CEIG12/156-156","DOIUrl":"https://doi.org/10.2312/LocalChapterEvents/CEIG/CEIG12/156-156","url":null,"abstract":"","PeriodicalId":385751,"journal":{"name":"Spanish Computer Graphics Conference","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":"124012504","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}

{"title":"A GPU-accelerated LiDAR Sensor for Generating Labelled Datasets","authors":"Alfonso López Ruiz, C. Ogáyar-Anguita, F. F. Higueruela","doi":"10.2312/ceig.20211360","DOIUrl":"https://doi.org/10.2312/ceig.20211360","url":null,"abstract":"This paper presents a GPU-based LiDAR simulator to generate large datasets of ground-truth point clouds. LiDAR technology has significantly increased its impact on academic and industrial environments. However, some of its applications require a large amount of annotated LiDAR data. Furthermore, there exist many types of LiDAR sensors. Therefore, developing a parametric LiDAR model allows simulating a wide range of LiDAR scanning technologies and obtaining a significant number of points clouds at no cost. Beyond their intensity data, these synthetic point clouds can be classified with any level of detail.","PeriodicalId":385751,"journal":{"name":"Spanish Computer Graphics Conference","volume":"7 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":"129752050","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}

{"title":"A Framework for Rendering, Simulation and Animation of Crowds","authors":"N. Pelechano, B. Spanlang, A. Beacco","doi":"10.2312/LocalChapterEvents/CEIG/CEIG09/001-010","DOIUrl":"https://doi.org/10.2312/LocalChapterEvents/CEIG/CEIG09/001-010","url":null,"abstract":"Real-time crowd simulation for virtual environment applications requires not only navigation and locomotion in large environments while avoiding obstacles and agents, but also rendering high quality 3D fully articulated figures to enhance realism. In this paper, we present a framework for real-time simulation of crowds. The framework is composed of a Hardware Accelerated Character Animation Library (HALCA), a crowd simulation system that can handle large crowds with high densities (HiDAC), and an Animation Planning Mediator (APM) that bridges the gap between the global position of the agents given by HiDAC and the correct skeletal state so that each agent is rendered with natural locomotion in real-time. The main goal of this framework is to allow high quality visualization and animation of several hundred realistic looking characters (about 5000 polygons each) navigating virtual environments on a single display PC, a HMD \u0000(Head Mounted Display), or a CAVE system. Results of several applications on a number of platforms are presented.","PeriodicalId":385751,"journal":{"name":"Spanish Computer Graphics Conference","volume":"86 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":"128621873","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}

{"title":"A Usability Study for a Novel Approach to Virtual Reality Interaction","authors":"José Negrillo-Cárdenas, J. Jiménez, F. Feito-Higueruela","doi":"10.2312/ceig.20181151","DOIUrl":"https://doi.org/10.2312/ceig.20181151","url":null,"abstract":"The number of virtual reality-based systems have considerably increased in recent years due to many technical improvements and lower prices. Nowadays, the applications of this kind of systems go further than videogames. Additionally, they enable new interaction paradigms adapted to this new technology. In this paper we propose a new interaction model to visualize objects in a virtual reality context. We describe our proposed mechanisms to achieve a set of graphical tasks and we conduct an experiment to assess the usability of the system, comparing it to other traditional methods.","PeriodicalId":385751,"journal":{"name":"Spanish Computer Graphics Conference","volume":"90 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":"127658602","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}

{"title":"Uncertainty Visualization of Brain Fibers","authors":"P. Hermosilla, R. Brecheisen, Pere-Pau Vázquez, A. Vilanova","doi":"10.2312/LocalChapterEvents/CEIG/CEIG12/031-040","DOIUrl":"https://doi.org/10.2312/LocalChapterEvents/CEIG/CEIG12/031-040","url":null,"abstract":"Diffuse Tensor Imaging (DTI) is an acquisition method based on Magnetic Resonance (MR) that provides information on the white matter fiber pathways in the living human brain. Such knowledge is crucial for understanding the way different parts of the brain work and how they interact with each other. The reconstruction of fiber tracts, however, depends on a number of parameters that introduce a degree of uncertainty in the data. Together with the parameter setting, other elements such as noise, motion, partial volume effects, or image artifacts increase the uncertainty. Therefore, fiber tracking algorithms may produce misleading results. Visualizing such uncertainty is important to avoid taking wrong decisions in medical environments. In this paper we present a set of techniques that provide a better understanding on the visualization of brain fibers by means of textures, silhouettes, occlusion, and animation.","PeriodicalId":385751,"journal":{"name":"Spanish Computer Graphics Conference","volume":"6 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":"127692341","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}

{"title":"Aplicación del motor de videojuegos Unity para la reconstrucción virtual de yacimientos arqueológicos","authors":"Alberto Calzado-Martínez, A. Fernández, Lidia M. Ortega-Alvarado","doi":"10.2312/ceig.20211359","DOIUrl":"https://doi.org/10.2312/ceig.20211359","url":null,"abstract":"En este trabajo se presenta una aplicación desarrollada para enriquecer y ampliar las técnicas actuales de registro arqueológico. Basada en una arquitectura cliente-servidor, se ha utilizado el motor de videojuegos Unity para implementar una aplicación cliente sencilla e intuitiva que permite realizar la reconstrucción virtual de un yacimiento a partir del escaneado 3D in situ del terreno excavado, así como del escaneado 3D en laboratorio de los hallazgos más importantes. Así se consigue preservar la información espacial del yacimiento, y se facilita la visita virtual del mismo desde cualquier equipo conectado a Internet. CCS Concepts • Applied computing → Arts and humanities; • Human-centered computing → Graphical user interfaces; Information visualization; • Computing methodologies → Virtual reality; 1. Introducción y estado del arte El proceso de registro es una de las tareas más importantes en Arqueología. Desde que se encuentra un hallazgo en un yacimiento hasta que se cataloga e integra en una base de datos, se realizan una serie de tareas muy meticulosas [Luc11]. El objetivo es capturar y preservar para la posteridad la mayor información posible. A pesar de lo preciso de la metodología seguida, aún hay aspectos que pueden mejorarse en el registro arqueológico. En concreto, la disposición espacial de dichos hallazgos es crucial para una reconstrucción posterior o para tratar de hacer una retrospectiva del momento en el que fueron sepultados [DCC18]. Para poder añadir la mayor información posible al respecto, es habitual añadir a la información alfanumérica (fechas, nombres, dimensiones, etcétera) fotografías o dibujos hechos a mano de los objetos, siempre antes de ser extraídos. Aunque estas entradas 2D son muy enriquecedoras, tienen muchas limitaciones porque: (1) son representaciones con un alto nivel de abstracción al tratar una realidad tridimensional de manera bidimensional; (2) están tomadas en un instante de la excavación y normalmente desde un punto de vista o ángulo específico y (3) no suelen estar totalmente integradas con la base de datos, es decir, son campos de información añadida pero no conectada con la información alfanumérica. Las limitaciones del 2D se han resuelto en gran medida con la digitalización en 3D [KFH10]. Algunos ejemplos de técnicas de captura 3D son la fotogrametría (dentro de la cual encontramos la ∗ Autor de contacto: algarcia@ujaen.es Structure from Motion) [ES20], y los escaneados tipo láser o LiDAR (Light Detection and Ranging) [RR17, ABPK∗18]. Los modelos 3D ofrecen ventajas, principalmente en términos de visualización, y también para el análisis y el intercambio de datos [Jen18]. Estas tecnologías pueden solucionar la falta de precisión en la representación. Sin embargo, la integración de información 3D con una base de datos tradicional sigue siendo un desafío [GCM19]. Los modelos escaneados suelen ser muy pesados, y se necesita software y a veces hardware diferente para su visualización. En algunos cas","PeriodicalId":385751,"journal":{"name":"Spanish Computer Graphics Conference","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":"122818019","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}

{"title":"A Survey on Development Tools for Mobile Augmented Reality","authors":"Gustavo Rovelo, F. Abad, E. Camahort","doi":"10.2312/LocalChapterEvents/CEIG/CEIG12/141-150","DOIUrl":"https://doi.org/10.2312/LocalChapterEvents/CEIG/CEIG12/141-150","url":null,"abstract":"Augmented Reality (AR) applications have become more popular beyond the research laboratory due to recent technological breakthroughs in computer hardware and mobile devices. Users are starting to interact with virtual content mixed with real environments at their offices, homes, and schools using their mobile phones. For this growing market, developers have first to decide the platform in which they will develop the application (e.g. Apple iOS or Android). Then they must decide whether start writing the application from scratch using only platform native tools, or using one of the available Software Development Kits (SDKs), or using high-level authoring tools for the chosen platform. Besides, developers have to face different AR related issues according to the application’s requirements: markers, barcodes or general image tracking, geolocation, efficient rendering of 3D objects, and designing a robust GUI for the target devices. To help developers and researchers to start writing mobile AR applications, this survey identifies the main features of several freeware and commercial SDKs and authoring tools. Categories and Subject Descriptors (according to ACM CCS) :","PeriodicalId":385751,"journal":{"name":"Spanish Computer Graphics Conference","volume":"86 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":"127871217","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}