Daniel Makoto Tokunaga

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Augmented Reality (AR) systems which use optical tracking with fiducial marker for registration have had an important role in popularizing this technology, since only a personal computer with a conventional webcam is required. However, in most these applications, the virtual elements are shown only in the foreground a real element does not occlude a virtual(More)
Spatial visualization of virtual contents appears to be, with the appearance of stereoscopic displays, the next step for increasing immersion in visual output. This kind of visualization can be used to facilitate the understanding of complex informations, like anatomic structures. One approach currently adopted for this purpose is the use of(More)
The goal of the work described here is to integrate a 3D input device, the Wii controller, and enJine, a didactic engine, motivated by the growing use of 3D interfaces. This article discusses how this increases enJine's didactic and technological potential, and details the adopted solution as a layered architecture. Two interaction styles were tested with(More)
Formulation of perceptual objective metrics for haptic interaction evaluation is still a challenge. These metrics are created including the human perception and the distortion intensity of the haptic signals, however, they disregarded peculiarities of tasks to be performed during human-computer interaction. Thus, we proposed a metric specialized in(More)
The digital games industry is always looking for innovation in user experience. A new trend in this field is the use of Augmented Reality (AR) techniques for intuitive, novel game interfaces [Bernardes Jr et al. 2008]. Among the several technologies related to AR, video avatars are one of the most attractive for games, because they allow the insertion of(More)
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