Environnement de Réalité Augmentée Collaboratif : Manipulation d'Objets Réels et Virtuels

National audienceLa réalité augmentée est un outil indispensable pour certaines situations collaboratives. Nous proposons un environnement multi-utilisateurs, multi-périphériques dédié aux applications collaboratives. Il repose sur une architecture modulaire et facilement configurable pour une mise en place rapide d'une session de travail. Cette plate-forme est utilisée pour démontrer des techniques d'interactions très intuitives pour la manipulation d'objets réels et virtuels et la visualisation à plusieurs échelles. On introduit également des méthodes pour ajouter de façon dynamique des objets réels et virtuels, qui s'intègrent alors dans le même espace. Basé sur des concepts de vue privée et de droits d'accès aux éléments de la scène, l'environnement gère l'interaction multi-utilisateurs

tCAD: a 3D modeling application on a depth enhanced tabletop computer

Tabletop computers featuring multi-touch input and object tracking are a common platform for research on Tangible User Interfaces (also known as Tangible Interaction). However, such systems are confined to sensing activity on the tabletop surface, disregarding the rich and relatively unexplored interaction canvas above the tabletop. This dissertation contributes with tCAD, a 3D modeling tool combining fiducial marker tracking, finger tracking and depth sensing in a single system. This dissertation presents the technical details of how these features were integrated, attesting to its viability through the design, development and early evaluation of the tCAD application. A key aspect of this work is a description of the interaction techniques enabled by merging tracked objects with direct user input on and above a table surface.Universidade da Madeir

Tangible interfaces for manipulating aggregates of digital information

Thesis (Ph. D.)--Massachusetts Institute of Technology, School of Architecture and Planning, Program in Media Arts and Sciences, 2002.Includes bibliographical references (p. 255-269).This thesis develops new approaches for people to physically represent and interact with aggregates of digital information. These support the concept of Tangible User Interfaces (TUIs), a genre of human-computer interaction that uses spatially reconfigurable physical objects as representations and controls for digital information. The thesis supports the manipulation of information aggregates through systems of physical tokens and constraints. In these interfaces, physical tokens act as containers and parameters for referencing digital information elements and aggregates. Physical constraints are then used to map structured compositions of tokens onto a variety of computational interpretations. This approach is supported through the design and implementation of several systems. The mediaBlocks system enables people to use physical blocks to "copy and paste" digital media between specialized devices and general-purpose computers, and to physically compose and edit this content (e.g., to build multimedia presentations). This system also contributes new tangible interface techniques for binding, aggregating, and disaggregating sequences of digital information into physical objects.(cont.) Tangible query interfaces allow people to physically express and manipulate database queries. This system demonstrates ways in which tangible interfaces can manipulate larger aggregates of information. One of these query approaches has been evaluated in a user study, which has compared favorably with a best-practice graphical interface alternative. These projects are used to support the claim that physically constrained tokens can provide an effective approach for interacting with aggregates of digital information.by Brygg Anders Ullmer.Ph.D