high performance computing on graphics processing units: hgpu.org

Low-Density Parity-Check (LDPC) codes are among the best error correcting codes known and have been adopted by data transmission standards, such as DVB-S2 or WiMax. They are based on binary sparse parity check matrices and usually represented by Tanner graphs. LDPC decoders require very intensive message-passing algorithms, also known as belief propagation. This paper proposes […]

Geometric Calibration of digital camera and video is useful for experimental work, such as video surveillance, virtual endoscope etc. High-performance computing holds the key to making biologically relevant calculations tractable without compromise. In this paper we present a new approach to high performance GC algorithm on graphics processing units. Using modern graphics processing units for […]

In this article, we present a particle-based animation method for viscoelastic materials. All polymeric materials, such as proteins, fats, and plastics, have viscoelastic characteristics. Such materials are composed of intertwined polymer chains, which we modeled in the proposed simulation method as particle chains connected by a spring force based on Rouse’s spring-bead model. We modified […]

A finite-element (FE) model of human skin is proposed for future use in an interactive real-time surgical simulation to teach surgeons procedures, such as facial reconstruction using skin-flap repair. For this procedure, skin is cut into flaps that are stretched to cover openings in the face. Thus, the model must recreate the visual, haptic, and […]

We present a system for 3D visualisation, which combines user-tracking, used by displays with steerable optics, with generation of multiple views, typical for displays with fixed optical filter. Instead of eye-tracking, typical for the user-tracking approach, we propose a less computationally demanding head tracking, based on face detection. We investigate if the precise delivery of […]

The coming era of petascale computing and heterogeneous platforms calls for fundamental changes in perspective on how we design distributed visualization software.

The development of customized solutions for optimized consumer electronics applications like game processors is pushing the boundaries of VLSI in many ways. The author will describe architectural, circuit, packaging and manufacturing challenges focusing on why game processors are different and require unique solutions. A historical perspective of gaming and entertainment systems and their intersection with […]

Compressive Sensing (CS) is a nascent sampling and reconstruction paradigm that describes how sparse or compressible signals can be accurately approximated using many fewer samples than traditionally believed. In magnetic resonance imaging (MRI), where scan duration is directly proportional to the number of acquired samples, CS has the potential to dramatically decrease scan time. However, […]

Multimedia and some scientific applications have achieved good performance on the stream processor architecture by employing the stream programming model. In order to find out the way to accelerate the symmetric cryptograph on stream processor, we implement and analyze cryptograph algorithms on different stream processors in this paper. Four cipher algorithms including RC5, AES, TWOFISH […]

We present a 0.5 Petaflop/s calculation of homogeneous isotropic turbulence in a cube of 2048^3 particles, using a highly parallel fast multipole method (FMM) using 2048 GPUs on the TSUBAME 2.0 system. We compare this particle-based code with a spectral DNS code under the same calculation condition and the same machine. The results of our […]

Single processor technology has been evolving across last decades, but due to physical limitations of chip manufacturing process, the industry is pursuing alternatives to sustain computational power growth,including the creation of multi-core systems. Parallel computing targets problems that are scalable and possibly distributed, dividing the problem into smaller pieces. This approach may be explored to […]

Inspired by the expectation-based perception of humans, a surprise-driven active vision system is proposed. This vision system not only considers spatial saliency of objects in the environment, but also investigates temporal novelty in the neighborhood. Surprise is defined as the difference of the saliency probability distributions of two consecutive input images, which is measured using […]