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Item 3D-ize U! A Real-time 3D Head-model Texture Generator for Android(The Eurographics Association, 2011) Boi, Stefano; Sorrentino, Fabio; Marras, Stefano; Scateni, Riccardo; Andrea F. Abate and Michele Nappi and Genny TortoraRecently, the number of applications developed for smartphones has dramatically increased; however, at the moment, applications having the purpose of creating and displaying 3D models are quite rare. The goal of this work is to build an application that allows the user to see the virtual three-dimensional representations of their friends and interact with them. The main challenge is to achieve results similar to those that a computer would produce, optimizing the process to deal with the constraints due to the technology used. Since there are no similar mobile applications, this work will make possible to create a base onto which realizing applications that have customized 3D models as a common feature.Item To What Extent Are Existing Volume Mapping Algorithms Practically Useful?(The Eurographics Association, 2024) Meloni, Federico; Cherchi, Gianmarco; Scateni, Riccardo; Livesu, Marco; Caputo, Ariel; Garro, Valeria; Giachetti, Andrea; Castellani, Umberto; Dulecha, Tinsae GebrechristosMappings between geometric domains play a crucial role in many algorithms in geometry processing and are heavily used in various applications. Despite the significant progress made in recent years, the challenge of reliably mapping two volumes still needs to be solved to an extent that is satisfactory for practical applications. This paper offers a review of provably robust volume mapping algorithms, evaluating their performances in terms of time, memory and ability to generate a correct result both with exact and inexact numerical models. We have chosen and evaluated the two most advanced methods currently available, using a state-of-the-art benchmark designed specifically for this type of analysis. We are sharing both the statistical results and specific volume mappings with the community, which can be utilized by future algorithms for direct comparative analysis. We also provide utilities for reading, writing, and validating volume maps encoded with exact rational coordinates, which is the natural form of output for robust algorithms in this class. All in all, this benchmark offers a neat overview of where do we stand in terms of ability to reliably solve the volume mapping problem, also providing practical data and tools that enable the community to compare future algorithmic developments without the need to re-run existing methods.Item Two Examples of GPGPU Acceleration of Memory-intensive Algorithms(The Eurographics Association, 2010) Marras, Stefano; Mura, Claudio; Gobbetti, Enrico; Scateni, Riccardo; Scopigno, Roberto; Enrico Puppo and Andrea Brogni and Leila De FlorianiThe advent of GPGPU technologies has allowed for sensible speed-ups in many high-dimension, memory-intensive computational problems. In this paper we demonstrate the e ectiveness of such techniques by describing two applications of GPGPU computing to two di erent subfields of computer graphics, namely computer vision and mesh processing. In the first case, CUDA technology is employed to accelerate the computation of approximation of motion between two images, known also as optical flow. As for mesh processing, we exploit the massivelyparallel architecture of CUDA devices to accelerate the face clustering procedure that is employed in many recent mesh segmentation algorithms. In both cases, the results obtained so far are presented and thoroughly discussed, along with the expected future development of the work.Item The Py3DViewer Project: A Python Library for fast Prototyping in Geometry Processing(The Eurographics Association, 2019) Cherchi, Gianmarco; Pitzalis, Luca; Frongia, Giovanni Laerte; Scateni, Riccardo; Agus, Marco and Corsini, Massimiliano and Pintus, RuggeroFast research and prototyping, nowadays, is shifting towards languages that allow interactive execution and quick changes. Python is very widely used for rapid prototyping. We introduce Py3DViewer, a new Python library that allows researchers to quickly prototype geometry processing algorithms by interactively editing and viewing meshes. Polygonal and polyhedral meshes are both supported. The library is designed to be used in conjunction with Jupyter environments, which allow interactive Python code execution and data visualization in a browser, thus opening up the possibility of viewing a mesh while editing the underlying geometry and topology.Item Natural Interaction and Computer Graphics Applications(The Eurographics Association, 2010) Iacolina, Samuel A.; Lai, Alessandro; Soro, Alessandro; Scateni, Riccardo; Enrico Puppo and Andrea Brogni and Leila De FlorianiNatural 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.Item Gestural Interaction for Robot Motion Control(The Eurographics Association, 2011) Broccia, Giuseppe; Livesu, Marco; Scateni, Riccardo; Andrea F. Abate and Michele Nappi and Genny TortoraRecent advances in gesture recognition made the problem of controlling a humanoid robot in the most natural possible way an interesting challenge. Learning from Demonstration field takes strong advantage from this kind of interaction since users who have no robotics knowledge are allowed to teach new tasks to robots easier than ever before. In this work we present a cheap and easy way to implement humanoid robot along with a visual interaction interface allowing users to control it. The visual system is based on the Microsoft Kinect's RGB-D camera. Users can deal with the robot just by standing in front of the depth camera and mimicking a particular task they want to be performed by the robot. Our framework is cheap, easy to reproduce, and does not strictly depend on the particular underlying sensor or gesture recognition system.Item Design and Implementation of a Visualization Tool for the in-depth Analysis of the Domestic Electricity Consumption(The Eurographics Association, 2019) Merlin, Gabriele; Ortu, Daniele; Cherchi, Gianmarco; Scateni, Riccardo; Agus, Marco and Corsini, Massimiliano and Pintus, RuggeroIn this poster, we present a visualization tool for the in-depth analysis of domestic electricity consumption. The web-interface allows users to visualize their electricity consumption, compare them with their own records or with the means of selected communities.Item Skeleton Lab: an Interactive Tool to Create, Edit, and Repair Curve-Skeletons(The Eurographics Association, 2015) Barbieri, Simone; Meloni, Pietro; Usai, Francesco; Scateni, Riccardo; Andrea Giachetti and Silvia Biasotti and Marco TariniCurve-skeletons are well known shape descriptors, able to encode topological and structural information of a shape. The range of applications in which they are used comprises, to name a few, computer animation, shape matching, modelling and remeshing. Different tools for automatically extracting the curve-skeleton for a given input mesh are currently available, as well as inverse skeletonization tools, where a user-defined skeleton is taken as input in order to build a mesh that reflects the encoded structure. Although their use is broad, an automatically extracted curve-skeleton is usually not well-suited for the next pipeline step in which they will be used. We present a tool for creating, editing and repairing curve-skeletons whose aim is to allow users to obtain, within minutes, curve-skeletons that are tailored for their specific task.Item AR Turn-by-turn Navigation in Small Urban Areas and Information Browsing(The Eurographics Association, 2014) Cherchi, Gianmarco; Sorrentino, Fabio; Scateni, Riccardo; Andrea GiachettiNavigation systems allow to discover cities and their urban areas easily and quickly, finding the shortest path to reach them and giving directions to users saving their time and energy. At present time, these systems are based over streets maps offered by the major mapping services like Tele Atlas, Navteq or OpenStreetMap. In recent years, thanks to the Google StreetView service it has been possible to discover main cities locations both indoor and outdoor. What is missing in this frame is the possibility to map small urban areas of small and medium sized cities, due to their lack of relevance for the big players. In this cities there could be very interesting areas for tourists. Example locations could be botanical gardens, archeological sites, protected natural areas among others. In this work we tried to set up a navigation system for limited extensions inside urban areas which permits to wander around and gives access to related information using augmented reality techniques. Due to the possible poor wireless coverage in these locations we designed an application that stores all required data on the user's device, splitting the information in packages according to the chosen language. A key issue was to achieve good results combining all these features in a single device with a small display, overwhelming the constraints due to the mobile environment.Item A Seamless Pipeline for the Acquisition of the Body Shape: the Virtuoso Case Study(The Eurographics Association, 2017) Saba, Marianna; Sorrentino, Fabio; Muntoni, Alessandro; Casti, Sara; Cherchi, Gianmarco; Carcangiu, Alessandro; Corda, Fabrizio; Murru, Alessio; Spano, Lucio Davide; Scateni, Riccardo; Vitali, Ilaria; Salvetti, Ovidio; Magrini, Massimo; Villa, Andrea; Carboni, Andrea; Pascali, Maria Antonietta; Andrea Giachetti and Paolo Pingi and Filippo StancoIn this paper, we describe the design and the implementation of the demonstrator for the Virtuoso project, which aims at creating seamless support for fitness and wellness activities in touristic resort.We define the objectives of the user interface, the hardware and software setup, showing how we combined and exploited consumer-level devices for supporting 3D body scan, contact-less acquisition of physical parameters, exercise guidance and operator support.