We propose an hybrid CPU-GPU ray-tracing implementation based on an optimal Kd-Tree as acceleration structure. The construction and traversal of this KD-tree takes benefit from both the CPU and the GPU to achieve high-performance ray-tracing on mainstream hardware. Our approach, flexible enough to use only a single computing unit (CPU or GPU), is able to efficiently distribute workload between ...

In this paper we discuss the possibilities for parallel implementations of network simulators. Specifically we investigate the options for porting parts of the simulator on GPU in order to utilize its resources and obtain faster simulations. We discuss few issues which are unsuitable for the GPU architecture, and we propose a possible work around for each of them. We introduce a design of paral...

This paper address the problem of obtaining from one web camera and a computer display, a facial reconstruction of the user within online messaging applications. In this paper we present a 3D shape recovery in real time based on the photometric information of a set of 4 images under varying illumination conditions. Our GPU implementation provides online realistic 3D face recontructions.

The growing number of Boolean variables requires very efficient approaches to solve the given tasks. We explore the utilization of the GPU for fast parallel Boolean calculations in this paper. Hundreds of processor cores of the GPU offer a significant potential for improvements. Constraints in their application may restrict the reachable speedup. This paper summarizes alternative approaches for...

In this paper, we describe an implementation of a real-time sound synthesizer using Finite Difference-based simulation of a two-dimensional membrane. Finite Difference (FD) methods can be the basis for physics-based music instrument models that generate realistic audio output. However, such methods are compute-intensive; large simulations cannot run in real time on current CPUs. Many current sy...

We present a gravitational hierarchical N-body code that is designed to run efficiently on Graphics Processing Units (GPUs). All parts of the algorithm are exectued on the GPU which eliminates the need for data transfer between the Central Processing Unit (CPU) and the GPU. Our tests indicate that the gravitational tree-code outperforms tuned CPU code for all parts of the algorithm and show an ...

Figure 1: Conceptual sketches of some three-dimensional (3D) medical telepresence paradigms. Left: a portable multi-camera unit. Right: hospital-based 3D viewing. (Sketches by Andrei State.)