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Posts

Jun, 8

The Performance Analysis Based on Heterogeneous Parallel Processors for Anisotropic Diffusion Filters

A noise in digital image degrades the performance of image processing. These images are most often used in medical field for diagnosis and treatment. Thus, there is a huge demand for high quality images from the medical field. The current algorithms to process useable images are derived using Gaussian blur filter. However, using such isotropic […]
Jun, 8

Native Offload of Haskell Repa Programs to GPGPU

In light of recent hardware advances, General Purpose Graphics Processing Units (GPGPUs) are becoming increasingly commonplace, and demand novel programming models to account for their radically different architecture. For the most part, existing approaches to programming GPGPUs within a high-level programming language choose to embed a domain specific language (DSL) within a host metalanguage and […]
Jun, 8

A numerical tour of wave propagation

This tutorial is written for beginners as an introduction to basic wave propagation using nite di erence method, from acoustic and elastic wave modeling, to reverse time migration and full waveform inversion. Most of the theoretical delineations summarized in this tutorial have been implemented in Madagascar with Matlab, C and CUDA programming, which will bene t readers’ […]
Jun, 8

Efficient 3D Isotropic Volume Reconstruction Based On 2D Localized Ultrasound Images

A miniature 3D tracked ultrasonic probe has been developed to acquire intra-articular cartilage images under arthroscopic surgical conditions. The aim is to detect cartilaginous lesions (arthritis) and quantify their precise sizes and locations to help the clinician in his diagnostic and his therapeutic decision making. The ultrasonic transducer is tracked by an optical sensor, which […]
Jun, 8

Review and Comparative Study of Ray Traversal Algorithms on a Modern GPU Architecture

In this paper we present a chronological review of five distinct data structures commonly found in literature and ray tracing systems: Bounding Volume Hierarchies (BVH), Octrees, Uniform Grids, KD-Trees, and Bounding Interval Hierarchies (BIH). This review is then followed by an extensive comparative study of six different ray traversal algorithms implemented on a modern Kepler […]
Jun, 7

International Conference on VLSI Systems, Architecture, Technology and Applications, VLSI-SATA 2015

International Conference on VLSI Systems, Architecture, Technology and Applications (VLSI-SATA 2015) will be held at the Amrita Viswa Vidyapeetham (University), School of Engineering, Bengaluru Campus during January 8-10, 2015. The conference will serve as an annual forum for researchers, academicians, and practitioners from around the world to present their current theoretical research efforts, system and […]
Jun, 7

Implementation and Experimental Evaluation of a CUDA Core under Single Event Effects

Graphic Processing Units have become popular in a broad range of applications due to their high computational power and low prices. Among the applications are the safety critical ones, where fault tolerance is mandatory. This paper presents the implementation of a CUDA core, the main processing core of a GPU and its evaluation under Single […]
Jun, 7

Parallelization of Synthetic Aperture Radar (SAR) Imaging Algorithms on GPU

The increased demand for higher resolution and detailed SAR imaging builds up a pressure on the processing power of the existing systems for real time or near real time processing. Exploitation of GPU processing power could suffice the increasing demands in processing. The processing of initial SAR systems was based on the principles of Fourier […]
Jun, 7

Performance Evaluation of Discrete Wavelet Transform Based on Image Compression Technique on Both CPU and GPU

This paper investigates the use of the Compute Unified Device Architecture (CUDA) programming model to implement Discrete Wavelet Transform (DWT) based algorithm for efficient image compression. The PSNR (Peak Signal to Noise Ratio) is used to evaluate image reconstruction quality in this paper. The results are presented and discussed.
Jun, 7

Brain perfusion imaging: performance and accuracy

Brain perfusion weighted images acquired using dynamic contrast studies have an important clinical role in acute stroke diagnosis and treatment decisions. The purpose of my PhD research is to develop novel methodologies for improving the efficiency and quality of brain perfusion-imaging analysis so that clinical decisions can be made more accurately and in a shorter […]
Jun, 6

Software-Based Hardening Strategies for Neutron Sensitive FFT Algorithms on GPUs

In this paper we assess the neutron sensitivity of Graphics Processing Units (GPUs) when executing a Fast Fourier Transform (FFT) algorithm, and propose specific software-based hardening strategies to reduce its failure rate. Our research is motivated by experimental results with an unhardened FFT that demonstrate a majority of multiple errors in the output in the […]
Jun, 6

An Improved Parallel Algorithm using GPU for Siting Observers on Terrain

This paper presents an efficient method to determine a set of observers (that is, where to site them) such that a given percentage of a terrain is visually covered. Our method extends the method proposed in (Franklin, 2002) including a local search heuristic efficiently implemented using dynamic programming and GPU parallel programming. This local search […]

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