Akira Morishita

Flatbed-type autostereoscopic display system and its image format for encoding

We have developed a flatbed-type autostereoscopic display system showing continuous motion parallax as an extended form of a one-dimensional integral imaging (1D-II) display system. The 1D-II display architecture is suitable for both flatbed and upright configurations. We have also designed an image format specification for encoding 1D-II data. In this parallax image array format, two (or more) viewpoint images whose viewpoint numbers are separated by a constant number are paired, and all of the paired images are combined to obtain an image the same size as the elemental image array. By using the format, 3-D image quality is hardly degraded by lossy codec. The conversion from this format to the elemental image array is simple and does not depend on changes in the viewing distance and associated changes in camera number. Decoding and converting speeds are sufficiently high due to utilization of middleware based on DirectX.

Concurrent Object Oriented 'C' (cooC)

Concurrent Object Oriented C (cooC) is a language based on the premise that an object not only provides an encapsulation boundary but should also form a process boundary; each object acts concurrently. Upon this basic model various control regimes can be applied to provide different execution and service policies. The cooC language model employs wait-when-necessary communication and affords shared resource protection (via exclusive method invocation). The cooC runtime provides for several execution paradigms for object and method invocation. Varying runtime parameters (number of threads and a mail queue size) allow for: sequential compatible evaluation; fine and coarse grain concurrency; and eager and lazy evaluation, cooC is an extension to C. The underlying syntax of cooC is the same as that of Objective-C; moreover, Objective-C objects are cooC objects which are to be evaluated with a sequential runtime and employ no special synchronisation. The CooC compiler converts cooC into C and also supports C++. Hence cooC is a superset of C, C++ and Objective-C. We present cooCs concurrency object model, runtime and support for various execution and service policies.

A motional interface approach based on user's tempo

People naturally use gesture to aid inter-personal communication. However, during computer interaction, users are obliged to use conventional devices such as keyboards, mice, and game-pads. In this paper a motional interface is described that allows processing of gestural inputs through the medium of a 3D image-input device, or Motion Processor, which provides a more natural framework for human-computer interaction. Several PC applications for this real-time motional interface will be presented in the live demonstration session. These applications are edutainment prototypes that make use of natural hand movement.