Portuguese Meeting on Computer Graphics 2004

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https://diglib.eg.org/handle/10.2312/2633102

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Browsing Portuguese Meeting on Computer Graphics 2004 by Subject "AR Toolkit"

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    Pintarolas, a Tangible Sketch Application
    (The Eurographics Association, 2021) Dias, José Miguel S.; Dehanov, Juana; Carola, Antonio; Cabral, Carolina; Carriço, Luís and Correia, Nuno and Antunes, Pedro and Jorge, Joaquim
    This paper presents Pintarolas, a simple sketch application that uses tangible interfaces as Human-Computer lnteraction modality. Totally sensor-less and cable-less interfaces (ordinary boardmarkers with fiducial markers attached), provide the means to support basic sketching tasks, such as drawing lines and sketching 2D primitive shapes (circle, triangle and square). The system requires an ordinary video camera linked to a PC and uses AR Toolkit for the handling of the Tangible Interfaces. Open GL is used for the graphical output and the CALI library, normally used for Calligraphic user interfaces development, is adopted in our case for 2D primilive shape recognition. A simple usability test was developed to assess the feasibility of this novel user interface in simple sketching tasks, showing that the users found the concept interesting and the tangible interfaces easy to operate.
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    A Tangible Interface for Augmented Reality Visualisation in 4D Echocardíography lmaging of the Left Ventricle of the Heart
    (The Eurographics Association, 2021) Dias, José Miguel S.; Rosário, Luis; Aurélio, Marisa; Carvalho, Luís S.; Carvalho, Helder; Rocha, Isabel; Carriço, Luís and Correia, Nuno and Antunes, Pedro and Jorge, Joaquim
    ln this work we report a Tangible Augmented Reality system that can be applied to interactive visualization scenarios in the cardiology medical field, such as in the teaching of medical techniques or in the recognition of organs. Moreover in can be used for a more detailed and natural interaction with virtual models of organs or other physiological stuctures of the human body. The system provides the means for a user to naturally interact with an augmented version of the previously referred models. The interaction with this models is made through the use of a totally sensor-less Tangible Interface, designated Magic Examiner, which aids the interaction and visualization tasks in the augmented environment.