Interactive visualization of APT data at full fidelity

TitleInteractive visualization of APT data at full fidelity
Publication TypeJournal Article
Year of Publication2013
AuthorsBryden A, Broderick S, Suram SK, Kaluskar K, LeSar R, Rajan K
Journal TitleUltramicroscopy
Date Published09
Type of ArticleArticle
ISBN Number0304-3991
Accession NumberWOS:000324235500022
KeywordsAtom probe tomography, atom-probe tomography, behavior, field evaporation, mass-spectra, materials, microstructures, silicon, spatial-resolution, Spherical impostor, surface, TUNGSTEN, VISUALIZATION

Understanding the impact of noise and incomplete data is a critical need for using atom probe tomography effectively. Although many tools and techniques have been developed to address this problem, visualization of the raw data remains an important part of this process. In this paper, we present two contributions to the visualization of data acquired through atom probe tomography. First, we describe the application of a rendering technique, ray cast spherical impostors, that enables the interactive rendering of large numbers (as large as 10 million plus) of pixel perfect, lit spheres representing individual atoms. This technique is made possible by the use of a consumer level graphics processing unit (CPU), and it yields an order of magnitude improvement both in render quality and speed over techniques previously used to render spherical glyphs in this domain. Second, we present an interactive tool that allows the user to mask, filter, and colorize the data in real time to help them understand and visualize a precise subset and properties of the raw data. We demonstrate the effectiveness of our tool through benchmarks and an example that shows how the ability to interactively render large numbers of spheres, combined with the use of filters and masks, leads to improved understanding of the three-dimensional (3D) and incomplete nature of atom probe data This improvement arises from the ability of lit spheres to more effectively show the 3D position and the local spatial distribution of individual atoms than what is possible with point or isosurface renderings. The techniques described in this paper serve to introduce new rendering and interaction techniques that have only recently become practical as well as new ways of interactively exploring the raw data (C) 2012 Elsevier B.V. All rights reserved.

URL<Go to ISI>://WOS:000324235500022