Naohisa Sakamoto

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Hardware-accelerated image composition for sort-last parallel rendering has received increasing attention as an effective solution to increased performance demands brought about by the recent advances in commodity graphics accelerators. So far, several different hardware solutions for alpha and depth compositing have been proposed and a few of them have(More)
This paper describes a level-of-detail rendering technique for large-scale irregular volume datasets. It is well known that the memory bandwidth consumed by visibility sorting becomes the limiting factor when carrying out volume rendering of such datasets. To develop a sorting-free volume rendering technique, we previously proposed a particle-based(More)
In this paper we present a parallelized particle-based volume rendering (PBVR) system to obtain super linear speedup, i.e. the speedup with N processors is greater than N, on a distributed computing system. PBVR is a technique of volume rendering which does not need any sorting therefore it is suitable for parallel execution. We implemented the parallel(More)
The Petaflow project aims to contribute to the use of high performance computational resources to the benefit of society. To this goal the emergence of adequate information and communication technologies with respect to high performance computing-networking-visualisation and their mutual awareness is required. The developed technology and algorithms will be(More)
We consider that eye-to-eye contact during face-to-face communication is important to understand each other in everyday communication. However, 3D display usually requires deflection glasses and a head mount display (HMD), and it is difficult to carry out eye-to-eye contact in such a condition. To support face-to-face communication by group in(More)