European Interdisciplinary Cybersecurity Conference最新文献

{"title":"Rewriting Rules for the Dual Graph of a Stripified CLOD Mesh","authors":"M. Porcu, R. Scateni","doi":"10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/023-029","DOIUrl":"https://doi.org/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/023-029","url":null,"abstract":"A triangular mesh is the piecewise linear approximation of a sampled or analytical surface, when each patch is a triangle. The connectivity of the mesh can be easily represented using its dual graph. Each node of such a graph has at most three incident edges; if the surface is homeomorphic to a sphere, each node has exactly three incident edges. Several triangular meshes, representing the same surface, with an increasing number of triangles are a representation of the surface at difierent levels of detail (LOD). When the number of triangles from one LOD to another varies continuously we call such a structure a continuous level of detail (CLOD) approximation of the surface. Given a CLOD data structure we can extract, at each level, the mesh representing the surface and derive its dual graph. If we group the triangles forming each mesh in strips, to accelerate their rendering, we should use two colors for the dual graph’s edges to distinguish between the edges linking nodes belonging to the same strip or not. The main goal of this paper is to present a set of rules to recolor the dual graph of the mesh when passing from one LOD to the next and back. The operations used to change the mesh are a Vertex Split (VS) when the resolution increases, and an Edge Collapse (EC) when the resolution decreases. We can, then, use a local topological analysis to derive the rules allowing to recolor the graph, and to show that, under certain conditions, the recoloring is optimal. This allows to keep efiectively an optimal triangle strip structure over the mesh, while changing its resolution.","PeriodicalId":405486,"journal":{"name":"European Interdisciplinary Cybersecurity Conference","volume":"91 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":"134161722","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":"Natural Interaction and Computer Graphics Applications","authors":"S. A. Iacolina, A. Lai, A. Soro, R. Scateni","doi":"10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2010/141-146","DOIUrl":"https://doi.org/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2010/141-146","url":null,"abstract":"Natural Interaction with computers has been a challenging topic of research since the very beginning of the digital era and refers to the possibility, on the user’s part, of exploiting natural abilities to control the machine and interpret its outputs. If in the infancy of computer graphics this meant using visual representation and pen pointing, nowadays more refined techniques are needed to fit the wide range of applications, from home entertainment to virtual and augmented reality. This paper describes some advances in gesture, tangible and surface computing, showing how such interaction models, if treated as a continuum, improve the usability, accessibility and overall experience of computer graphics applications.","PeriodicalId":405486,"journal":{"name":"European Interdisciplinary Cybersecurity Conference","volume":"26 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":"127627719","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 Message-Based Annotation System for Collaborative Design Review","authors":"M. Witzel, G. Conti, R. Amicis","doi":"10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2006/279-283","DOIUrl":"https://doi.org/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2006/279-283","url":null,"abstract":"The paper illustrates a shared annotation mechanism developed within a collaborative virtual environment for design review. This represents one of the first prototypes being developed within the European Project IMPROVE and it has been designed to be used within two distinct industrial scenarios: automotive and architectural design. The key feature of the system is that its functionalities (modelling, rendering, tracking) are distributed across a network of computers performing specific tasks and that the communication among these takes place through a standardised data message exchange. This paper shows the effectiveness of this approach by focusing on the implementation of the distributed annotation feature.","PeriodicalId":405486,"journal":{"name":"European Interdisciplinary Cybersecurity 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":"129386332","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":"Solutions to 3D Building Reconstruction from Photographs","authors":"G. Farinella, G. Mattiolo","doi":"10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2006/143-149","DOIUrl":"https://doi.org/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2006/143-149","url":null,"abstract":"The 3D model reconstruction of buildings from uncalibrated photographs allows new useful Computer Graphics and Computer Vision applications. In this paper we survey some solutions proposed in literature and in commerce. The common and different methodology are reported and described. Finally we try to address the 3D reconstruction problem of architectural scenes presenting our solution: BolBol. We demonstrate our reconstruction process and some results obtained applying BolBol to the modeling of real buildings.","PeriodicalId":405486,"journal":{"name":"European Interdisciplinary Cybersecurity Conference","volume":"20 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":"131103724","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":"Information Visualization on Organized Crime Trials","authors":"Lorenzo Di Silvestro, G. Gallo, G. Giuffrida, C. Zarba","doi":"10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2011/035-039","DOIUrl":"https://doi.org/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2011/035-039","url":null,"abstract":"Today everyone on the Internet becomes an active writer. It is simpler than ever to produce and to share new knowledge on the net. Users risk to be overwhelmed by too much information. To handle unorganized data may involve a huge effort by people and this could lead to information overload. A promising way to face these problems is Information Visualization. This contribution is a report of using visuo-spatial reasoning to help sociology scholars to understand and to manage large amounts of textual data. We use a very interesting dataset, especially for sociologists and jurists, extracted from a collection of sentences of trials on organized crime activities in Sicily. We report the results obtained in so far clustering and visualizing data.","PeriodicalId":405486,"journal":{"name":"European Interdisciplinary Cybersecurity Conference","volume":"41 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":"133604580","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":"Building Morphological Representations for 2D and 3D Scalar Fields","authors":"Lidija Comic, L. Floriani, F. Iuricich","doi":"10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2010/103-110","DOIUrl":"https://doi.org/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2010/103-110","url":null,"abstract":"Ascending and descending Morse complexes, defined by the critical points and integral lines of a scalar field f defined on a manifold domain D, induce a subdivision of D into regions of uniform gradient flow, and thus provide a compact description of the morphology of f on D. We propose a dimension-independent representation for the ascending and descending Morse complexes, and we describe a data structure which assumes a discrete representation of the field as a simplicial mesh, that we call the incidence-based data structure. We present algorithms for building such data structure for 2D and 3D scalar fields, which make use of a watershed approach to compute the cells of the Morse decompositions.","PeriodicalId":405486,"journal":{"name":"European Interdisciplinary Cybersecurity Conference","volume":"12 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":"133668294","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":"An Adaptive Video Surveillance Architecture for Behavior Analysis","authors":"L. Zini, Nicoletta Noceti, F. Odone","doi":"10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2010/057-064","DOIUrl":"https://doi.org/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2010/057-064","url":null,"abstract":"Adaptivity to scene changes is a main requirement for video analysis. The interpretation of video streams can be dealt by triggering different techniques depending on the scene properties. We present a work-on-progress for the design of a video surveillance architecture where different tasks in the context of behavior analysis are addressed, depending on the crowd level. A coarse estimation of the scene occupancy allows us to focus on single person or groups, adopting appropriate strategies to model the dynamic information. This paper focuses in particular on the crowd estimation problem: we propose a solution to detect and localize groups of people, able to provide an estimate of the number of people in the scene.","PeriodicalId":405486,"journal":{"name":"European Interdisciplinary Cybersecurity Conference","volume":"3 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":"132265267","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":"Mixed Reality and Gesture Based Interaction for Medical Imaging Applications","authors":"A. F. Abate, M. Nappi, S. Ricciardi, G. Tortora","doi":"10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2010/033-040","DOIUrl":"https://doi.org/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2010/033-040","url":null,"abstract":"This paper presents a framework providing a collection of techniques to enhance reliability, accuracy and overall effectiveness of gesture-based interaction applied to the manipulation of virtual objects within a Mixed Reality context. We propose an approach characterized by a floating interface, operated by two-hand gestures, for an enhanced manipulation of 3D objects. Our interaction paradigm, exploits one-hand, twohand and time-dependent gesture patterns to allow the user to perform inherently 3D tasks, like arbitrary object rotation, or measurements of relevant features, in a more intuitive yet accurate way. A real-time adaptation to the user’s needs is performed by monitoring hands and fingers motions, in order to allow both direct manipulation of virtual objects and conventional keyboard-like operations. The interface layout, whose details depend on the particular application at hand, is visualized via a stereoscopic see-through Head Mounted Display (HMD). It projects virtual interface elements, as well as application related virtual objects, in the central region of the user’s field of view, floating in a close-at-hand volume. The application presented here is targeted to interactive 3D visualization of human anatomy resulting from diagnostic imaging or from virtual models aimed at training activities. The testing conducted so far shows a measurable and user-wise perceptible improvement in performing 3D interactive tasks, like the selection of a particular spot on a complex 3D surface or the distance measurement between two 3D landmarks. This study includes both qualitative and quantitative reports on the system usability.","PeriodicalId":405486,"journal":{"name":"European Interdisciplinary Cybersecurity Conference","volume":"13 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":"124551003","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":"\"Beyond the desktop, Out of the Office...\" Designing Interactive Graphics Applications for Mobile Devices","authors":"L. Chittaro","doi":"10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/151-153","DOIUrl":"https://doi.org/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/151-153","url":null,"abstract":"The recent availability of increasingly powerful PDAs and mobile phones is making it possible to develop new applications based on interactive (2D as well as 3D) graphics. However, limitations of mobile devices and the peculiar needs of users on-the-go require a careful design of applications that are specifically thought for mobile devices and users [Chi06]. Mobile graphics applications become even more innovative and provide functionalities that were unavailable on desktop systems when they are integrated with various sensors (e.g., GPS, accelerometers, heart rate monitors, pulseoximeters, ...) that allow one to adapt the behavior of the application according to position in space (location-awareness) and other parameters (context-awareness). In this way, the mobile device becomes able to choose what to draw and how to draw it on the display based on what is happening to the user as well as the physical world that surrounds her. Moreover, the data recorded by mobile sensors about the behavior of users on the move lends itself to the design of visualizations that can be important in domains such as health care, urban planning, geomarketing, emergency management, and others. This invited talk will first discuss why and how mobile graphics applications require to be approached differently from traditional ones. Then, it will demonstrate some new mobile applications that have been developed in domains as diverse as tourism, health and fitness, navigation, and architectural visualization. Finally, it will deal with the visualization of mobile users’ behaviors by showing two different tools we have recently proposed [CRI06, NC07]. 1. Outline of the Talk Mobile devices (such as PDAs and mobile phones) are becoming more and more widespread, presenting designers of graphics applications with new challenges and opportunities. First, the devices have become powerful enough to support new, mobile applications of interactive (2D as well as 3D) graphics, but limitations of mobile devices and the peculiar needs of users on-the-go require a careful design that specifically addresses mobile devices and users [Chi06]. Second, these applications can be augmented with sensors that allow designers to make them context-aware as well as record information (e.g., position, orientation, physiological parameters,...) about their users. Therefore, visualizing information about the recorded mobile users’ behavior is another new subject that will become increasingly relevant in domains such as health care, urban planning, geomarketing, emergency management, user studies, and others. The keynote speech will discuss the different issues involved in designing interactive graphics applications for mobile devices, as well as present examples of applications for mobile devices and tools for the visualization of information about mobile users’ behaviors [CRI06, NC07]. The talk is organized in three parts that are described in more detail in the following. c © The Eurographics Asso","PeriodicalId":405486,"journal":{"name":"European Interdisciplinary Cybersecurity Conference","volume":"12 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":"114379550","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":"Form Features in Non-manifold Shapes: A First Classification and Analysis","authors":"Chiara Crovetto, L. Floriani, F. Giannini","doi":"10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/095-101","DOIUrl":"https://doi.org/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/095-101","url":null,"abstract":"During the industrial design process, a product model undergoes several analyses. One of the most common ones is the finite element analysis. This kind of analysis needs a simplified model, which can include idealised parts, and thus it is usually non-manifold and non-regular. During the idealisation process, the semantic information attached to the CAD model, such as features or surface types, or information used for model simplification, e.g. assumptions on the behavior type, is usually lost, thus making more difficult re-using, or, at least taking advantage, of performed simulations and models. This would be made easier if a meaningful interpretation of the object subparts is available. To this aim, in this paper, we provide a taxonomy of form features in non-manifold shapes and we describe an approach for their identification based on a decomposition of a non-manifold shapes into uniformly dimensional components proposed in [DHH06]. The process presented is the first step towards the identification of form features, since it analyzes those features containing non-manifold singularities.","PeriodicalId":405486,"journal":{"name":"European Interdisciplinary Cybersecurity Conference","volume":"200 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":"116155137","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}