TIARI: Uma Interface para Entrada de Texto em Sistemas de Realidade Aumentada

AUTOR(ES)

Isabel Wanderley da Silveira

DATA DE PUBLICAÇÃO

2007

RESUMO

Augmented Reality interfaces overlap virtual information in a real world scene, augmenting the userâs reality by interacting with virtual and real objects. To make this interaction possible, lots of interfaces were developed trying to make this interaction simple, efficient and intuitive. Some Augmented Reality applications need text input and interfaces like virtual keyboards, pinch keyboards, gestures, and others were proposed to make this interaction possible. However, some of these ways to interact are expensive, unconfortable or hard to be used by non expert users. So, this dissertation proposes a new interface for text input in Augmented Reality applications. This interface, called TIARI (Text Input Augmented Reality Interface) is a mixture of a virtual keyboard, gestures and a barehand interface using fiducial markers. To help on TIARIâs development, some libraries commonly used on the development of video based applications that use markers were studied, in order to choose the best ones to implement this kind of application. TIARI uses small fiducial markers in the userâs hand, so the ARTag marker detection library was used. Besides this, a video capture and a render library were used: OpenCV and OGRE using the OpenGL render system. In addition to this, an important library called OgreAR was used as TIARIâs base. This library is responsible for making the development of Augmented Reality applications easier, creating an abstraction layer to the marker detection and video capture libraries. To validate the developed interface, TIARI was integrated with an existent application, a 3D virtual desktop called mivaDesk. To evaluate TIARIâs usability, a usability study was made using TIARI and the soft keyboard existent in mivaDesk. As a result of this evaluation, TIARI was evaluated as easy to use and presented a higher typing rate compared to the mivaDesk soft keyboard. However, in a comparison made with a traditional QWERTY keyboard, TIARI got a low performance

ASSUNTO(S)

realidade aumentada augmented reality usability evaluation interface de interaÃÃo avaliaÃÃo de usabilidade entrada de texto ciencia da computacao interaction interface text input

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