The Bernstein Center Freiburg

Informal Seminar
Lars Hunger

University of Innsbruck

TBARF a Turning Band
Random Field Generator on the GPU

Many things can be described by a random field (RF), like snow fall heights, the surface of water, and initial conditions for scientific simulations. RF are correlated random numbers on a spatial grid. Current generation approaches commonly make use of 3D FFT (Fast Fourier Transform) and require the whole generated field to be stored in memory. Moreover, they are limited to regular rectilinear grids and need an extra processing step to support irregular grids. We implemented TBARF, our RF generation algorithm based on the Turning Band method, in OpenCL so that it can be efficiently executed on the GPU. In this approach the 3D FFT is replaced by a one-dimensional FFT followed by a projection step. First, I will give an overview of my past projects and then give a short introduction to RF, their description and generation. Finally, I will discuss the advantages of using the Turning Band method and show some examples of RF generated with our code.

Friday, March 28, 2014

11:30 h
BCF seminar room "Casino"
Hansastr. 9a
The talk is open to the public. Guests are cordially invited!