Emerging Technologies

Spheree: A 3D Perspective-Corrected Interactive Spherical Scalable Display

Spheree is a personal spherical display that arranges multiple blended and calibrated mini-projectors to transform a translucent globe into a high-resolution perspective-corrected 3D interactive display. It tracks both the user and Spheree to render user-targeted views onto the surface of the sphere. This provides motion parallax, occlusion, shading, and perspective depth cues to the user. One of the emerging technologies that makes Spheree unique is that it uses multiple mini-projectors, calibrated and blended automatically to create a uniform pixel space on the surface of the sphere. The calibration algorithm allows for as many projectors as needed for virtually any size of sphere, providing a linear scalability cost for higher-resolution spherical displays.

Spheree does not have any seams or blind spots, so rendered scenes are not occluded, and the display can support stereo 3D experiences. Using touch and gesture, it supports tangible interactions such as moving, rotating, sculpting, and painting objects, in addition to object manipulation. Computer-generated 3D models or 3D models of real objects can be imported into Spheree. Once objects are modified within Spheree, its workflow supports export of the modified model to work easily with other applications.

Two Spherees (different sizes) are presented at SIGGRAPH 2014 Emerging Technologies, to demonstrate that calibrated multiple-projector spherical displays represent a future of interactive, scalable, high-resolution, non-planar displays.

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Fernando Teubl Ferreira
Universidade de São Paulo

Marcio Cabral
Universidade de São Paulo

Olavo da Rosa Belloc
Universidade de São Paulo

Gregor Miller
The University Of British Columbia

Celso Kurashima
Universidade Federal do ABC

Roseli de Deus Lopes
Universidade de São Paulo

Marcelo Zuffo
Universidade de São Paulo

Sidney Fels
The University of British Columbia

Junia Anacleto
Universidade Federal de São Carlos

Ian Stavness
University of Saskatchewan