We have created Spheree, 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. We track 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 we use multiple mini-projectors, calibrated and blended automatically to create a uniform pixel space on the surface of the sphere. The calibration algorithm we developed 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, therefore rendered scenes are not occluded and the display can support stereo 3D experiences. Using touch and gesture we support 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, our workflow supports export of the modified model to work easily with other applications. At SIGGRAPH Emerging Technologies we will exhibit two Spherees (different sizes) to illustrate that calibrated multiple-projector spherical displays represent a future of interactive, scalable, high-resolution, non-planar displays. Participants at Siggraph will have a magical experience with Spheree, demonstrating its use in a 3D design workflow environment.
To be presented at the Emerging Technologies and Poster sessions of SIGGRAPH 2014:
Fernando Ferreira, Marcio Cabral, Olavo Belloc, Gregor Miller, Celso Kurashima, Rosali de Deus Lopes, Ian Stavness, Junia Anacleto, Marcelo Zuffo and Sidney Fels, ACM SIGGRAPH Conference on Computer Graphics and Interactive Techniques (SIGGRAPH 2014), Vancouver, British Columbia, Canada, August 2014