Eurographics Workshop on Graphics and Cultural Heritage最新文献

{"title":"A Practical Reflectance Transformation Imaging Pipeline for Surface Characterization in Cultural Heritage","authors":"I. Ciortan, R. Pintus, G. Marchioro, C. Daffara, Andrea Giachetti, E. Gobbetti","doi":"10.2312/gch.20161396","DOIUrl":"https://doi.org/10.2312/gch.20161396","url":null,"abstract":"We present a practical acquisition and processing pipeline to characterize the surface structure of cultural heritage objects. Using a free-form Reflectance Transformation Imaging (RTI) approach, we acquire multiple digital photographs of the studied object shot from a stationary camera. In each photograph, a light is freely positioned around the object in order to cover a wide variety of illumination directions. Multiple reflective spheres and white Lambertian surfaces are added to the scene to automatically recover light positions and to compensate for non-uniform illumination. An estimation of geometry and reflectance parameters (e.g., albedo, normals, polynomial texture maps coefficients) is then performed to locally characterize surface properties. The resulting object description is stable and representative enough of surface features to reliably provide a characterization of measured surfaces. We validate our approach by comparing RTI-acquired data with data acquired with a high-resolution microprofilometer.","PeriodicalId":203827,"journal":{"name":"Eurographics Workshop on Graphics and Cultural Heritage","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128355664","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":"ArchAIDE - Archaeological Automatic Interpretation and Documentation of cEramics","authors":"M. Gualandi, Roberto Scopigno, Lior Wolf, J. Richards, J. B. I. Garrigós, M. Heinzelmann, Miguel Angel Hervas, Llorenc Vila, M. Zallocco","doi":"10.2312/gch.20161408","DOIUrl":"https://doi.org/10.2312/gch.20161408","url":null,"abstract":"The goals of H2020 project \"ArchAIDE: are to support the classification and interpretation work of archaeologists with innovative computer-based tools, able to provide the user with features for the semi-automatic description and matching of potsherds over the huge existing ceramic catalogues. Pottery classification is of fundamental importance for the comprehension and dating of the archaeological contexts, and for understanding production, trade flows and social interactions, but it requires complex skills and it is a very time consuming activity, both for researchers and professionals. \u0000 \u0000The aim of ArchAIDE is to support the work of archaeologists, in order to meet real user needs and generate economic benefits, reducing time and costs. This would create societal benefits from cultural heritage, improving access, re-use and exploitation of the digital cultural heritage in a sustainable way. These objectives will be achieved through the development of: \u0000 \u0000• an as-automatic-as-possible procedure to transform the paper catalogues in a digital description, to be used as a data pool for search and retrieval process; \u0000 \u0000• a tool (mainly designed for mobile devices) that will support archaeologists in recognizing and classifying potsherds during excavation and post-excavation analysis, through an easy-to-use interface and efficient algorithms for characterisation, search and retrieval of the visual/geometrical correspondences; \u0000 \u0000• an automatic procedure to derive a complete potsherds identity card by transforming the data collected into a formatted electronic document, printable or visual; \u0000 \u0000• a web-based real-time data visualisation to improve access to archaeological heritage and generate new understanding; \u0000 \u0000• an open archive to allow the archival and re-use of archaeological data, transforming them into common heritage and permitting economic sustainability. \u0000 \u0000Those tools will be tested and assessed on real-cases scenarios, paving the way to future exploitation.","PeriodicalId":203827,"journal":{"name":"Eurographics Workshop on Graphics and Cultural Heritage","volume":"378 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115989602","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":"Harvesting Dynamic 3D Worlds from Commodity Sensor Clouds","authors":"T. Boubekeur, Paolo Cignoni, E. Eisemann, M. Goesele, R. Klein, S. Roth, Michael Weinmann, M. Wimmer","doi":"10.2312/gch.20161378","DOIUrl":"https://doi.org/10.2312/gch.20161378","url":null,"abstract":"The EU FP7 FET-Open project \"Harvest4D: Harvesting Dynamic 3D Worlds from Commodity Sensor Clouds\" deals with the acquisition, processing, and display of dynamic 3D data. Technological progress is offering us a wide-spread availability of sensing devices that deliver different data streams, which can be easily deployed in the real world and produce streams of sampled data with increased density and easier iteration of the sampling process. These data need to be processed and displayed in a new way. The Harvest4D project proposes a radical change in acquisition and processing technology: instead of a goal-driven acquisition that determines the devices and sensors, its methods let the sensors and resulting available data determine the acquisition process. A variety of challenging problems need to be solved: huge data amounts, different modalities, varying scales, dynamic, noisy and colorful data. This short contribution presents a selection of the many scientific results produced by Harvest4D. We will focus on those results that could bring a major impact to the Cultural Heritage domain, namely facilitating the acquisition of the sampled data or providing advanced visual analysis capabilities.","PeriodicalId":203827,"journal":{"name":"Eurographics Workshop on Graphics and Cultural Heritage","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125704248","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":"3D in-world Telepresence With Camera-Tracked Gestural Interaction","authors":"E. Champion, Li Qiang, Demetrius Lacet, A. Dekker","doi":"10.2312/gch.20161394","DOIUrl":"https://doi.org/10.2312/gch.20161394","url":null,"abstract":"While many education institutes use Skype, Google Chat or other commercial video-conferencing applications, these applications are not suitable for presenting architectural or urban design or archaeological information, as they don't integrate the presenter with interactive 3D media. Nor do they allow spatial or component-based interaction controlled by the presenter in a natural and intuitive manner, without needing to sit or stoop over a mouse or keyboard. A third feature that would be very useful is to mirror the presenter's gestures and actions so that the presenter does not have to try to face both audience and screen. \u0000 \u0000To meet these demands we developed a prototype camera-tracking application using a Kinect camera sensor and multi-camera Unity windows for teleconferencing that required the presentation of interactive 3D content along with the speaker (or an avatar that mirrored the gestures of the speaker). Cheaply available commercial software and hardware but coupled with a large display screen (in this case an 8 meter wide curved screen) allows participants to have their gestures, movements and group behavior fed into the virtual environment either directly or indirectly. Allowing speakers to present 3D virtual worlds remotely located audiences while appearing to be inside virtual worlds has immediate practical uses for teaching and long-distance collaboration.","PeriodicalId":203827,"journal":{"name":"Eurographics Workshop on Graphics and Cultural Heritage","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130322192","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":"Interactive 3D Exploration of a Virtual Sculpture Collection: an Analysis of User Behavior in Museum Settings","authors":"Marco Agus, F. Marton, F. Bettio, E. Gobbetti","doi":"10.2312/gch.20161393","DOIUrl":"https://doi.org/10.2312/gch.20161393","url":null,"abstract":"We present a usage analysis of an interactive system for the exploration of highly detailed 3D models of a collection of protostoric mediterranean sculptures. In this system, after selecting the object of interest inside the collection, its detailed 3D model and associated information are presented at high resolution on a large vertical display controlled by a touch-enabled horizontal surface placed at a suitable distance in front of it. The indirect user interface combines an object-aware interactive camera controller with an interactive point-of-interest selector and is implemented within a scalable implementation based on multiresolution structures shared between the rendering and user interaction subsystems. The system has been installed in several temporary and permanent exhibitions, and has been extensively used by tens of thousands of visitors. We provide here a data-driven analysis of usage experience based on logs gathered during a 24 months period in four exhibitions in Archeological museums, for a total of over 75K exploration sessions. The results highlight the main trends in visitor behavior during the interactive sessions, which can provide useful insights for the design of 3D exploration user interfaces in future digital installations.","PeriodicalId":203827,"journal":{"name":"Eurographics Workshop on Graphics and Cultural Heritage","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127541342","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":"Multi-View Ambient Occlusion for Enhancing Visualization of Raw Scanning Data","authors":"Manuele Sabbadin, Gianpaolo Palma, Paolo Cignoni, Roberto Scopigno","doi":"10.2312/gch.20161379","DOIUrl":"https://doi.org/10.2312/gch.20161379","url":null,"abstract":"The correct understanding of the 3D shape is a crucial aspect to improve the 3D scanning process, especially in order to perform high quality and as complete as possible 3D acquisitions on the field. The paper proposes a new technique to enhance the visualization of raw scanning data based on the definition in device space of a Multi-View Ambient Occlusion (MVAO). The approach allows improving the comprehension of the 3D shape of the input geometry and, requiring almost no preprocessing, it can be directly applied to raw captured point clouds. The algorithm has been tested on different datasets: high resolution Time-of-Flight scans and streams of low quality range maps from a depth camera. The results enhance the details perception in the 3D geometry using the multi-view information to make more robust the ambient occlusion estimation.","PeriodicalId":203827,"journal":{"name":"Eurographics Workshop on Graphics and Cultural Heritage","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130889012","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":"3D Documentation and Semantic Aware Representation of Cultural Heritage: the INCEPTION Project","authors":"R. D. Giulio, F. Maietti, E. Piaia","doi":"10.2312/gch.20161406","DOIUrl":"https://doi.org/10.2312/gch.20161406","url":null,"abstract":"As part of 3D integrated survey applied to Cultural Heritage, digital documentation is gradually emerging as effective support of many different information in addition to the shape, morphology and dimensional data. The implementation of data collection processes and the development of semantically enriched 3D models is an effective way to enhance the dialogue between ICT technologies, different Cultural Heritage experts, users and different disciplines, both social and technical. The possibility to achieve interoperable models able to enrich the interdisciplinary knowledge of European cultural identity is one of the main outcome of the European Project \"INCEPTION - Inclusive Cultural Heritage in Europe through 3D semantic modelling\", funded by EC within the Programme Horizon 2020. The project ranges from the documentation and diagnostic strategies for heritage protection, management and enhancement, to the 3D acquisition technologies. The development of hardware, software and digital platforms is aimed at representation and dissemination of cultural heritage through ICT processes and BIM addresses to Cultural Heritage assets, up to the implementation of semantic information to a wider and more extensive use of 3D digital models.","PeriodicalId":203827,"journal":{"name":"Eurographics Workshop on Graphics and Cultural Heritage","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132647341","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":"3D Semantic Modelling of Scale Models from 2D Historical Plans","authors":"C. Chevrier","doi":"10.2312/gch.20161398","DOIUrl":"https://doi.org/10.2312/gch.20161398","url":null,"abstract":"The French collection of Plans-Reliefs, scale models of fortified towns, are an exceptional architectural heritage. Many cities, represented on these plans-reliefs, would like to expose, develop and exploit this historical knowledge. However, the fragility, the dimension of the supports and the exposure conditions make this acquisition difficult. Thus, the creation and the exploitation of a virtual model is an interesting alternative. This paper presents a new method exploiting historical documentary for the 3D semantic modelling of Plans-Reliefs as more than the half physical Plans-Reliefs are currently enclosed in containers in Paris. From 2D plans, ground outlines and facades of buildings are partially-automatically extracted to create automatically the 3D textured model of each building and ground elements (streets, rivers and courtyards). Another specificity of the method is the use of graphical schemes for the description of parametric objects.","PeriodicalId":203827,"journal":{"name":"Eurographics Workshop on Graphics and Cultural Heritage","volume":"631 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116408698","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":"Using Flash Photography and Image-Based Rendering to Document Cultural Heritage Artifacts","authors":"Michael Tetzlaff, G. Meyer","doi":"10.2312/gch.20161397","DOIUrl":"https://doi.org/10.2312/gch.20161397","url":null,"abstract":"A novel image-based rendering system is proposed for documenting cultural heritage artifacts. The system utilizes backscattering photography to acquire the initial pictures and derives estimates for the object's diffuse albedo, surface normals, and the specular reflectivity from the images. A projective texture mapping technique is used to create a novel view of the artifact by blending the original photographs and projecting them onto a mesh that is also derived from the photos. By weighting the images according to how they best depict the manner in which a virtual light source illuminates the artifact's surface, object relighting is also achieved.","PeriodicalId":203827,"journal":{"name":"Eurographics Workshop on Graphics and Cultural Heritage","volume":"308 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114711461","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":"Automatic Selection of Video Frames for Path Regularization and 3D Reconstruction","authors":"G. Pavoni, M. Dellepiane, M. Callieri, Roberto Scopigno","doi":"10.2312/gch.20161376","DOIUrl":"https://doi.org/10.2312/gch.20161376","url":null,"abstract":"Video sequences can be a valuable source to document the state of objects and sites. They are easy to acquire and they usually ensure a complete coverage of the object of interest. \u0000 \u0000One of their possible uses is to recover the acquisition path, or the 3D shape of the scene. This can be done by applying structure-from-motion techniques to a representative set of frames extracted from the video. This paper presents an automatic method for the extraction of a predefined number of representative frames that ensures an accurate reconstruction of the sequence path, and possibly enhances the 3D reconstruction of the scene. \u0000 \u0000The automatic extraction is obtained by analyzing adjacent frames in a starting subset, and adding/removing frames so that the distance between them remains constant. This ensures the reconstruction of a regularized path and an optimized coverage of all the scene. Finally, more frames are added in the portions of the sequence when more detailed objects are framed. This ensures a better description of the sequence, and a more accurate dense reconstruction. \u0000 \u0000The method is automatic, fast and independent from any assumption about the acquired object or the acquisition strategy. It was tested on a variety of different video sequences, showing that a satisfying result can be obtained regardless of the length and quality of the input.","PeriodicalId":203827,"journal":{"name":"Eurographics Workshop on Graphics and Cultural Heritage","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130859261","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}