Title :
The Projection Explorer: A Flexible Tool for Projection-based Multidimensional Visualization
Author :
Paulovich, Fernando V. ; Oliveira, Maria Cristina F ; Minghim, Rosane
Author_Institution :
Univ. de Sao Paulo, Sao Carlos
Abstract :
Multidimensional projections map data points, defined in a high-dimensional data space, into a 1D, 2D or 3D representation space. Such a mapping may be typically achieved with dimensional reduction, clustering, or force directed point placement. Projections can be displayed and navigated by data analysts by means of visual representations, which may vary from points on a plane to graphs, surfaces or volumes. Typically, projections strive to preserve distance relationships amongst data points, as defined in the original space. Information loss is inevitable and the projection approach defines the extent to which the distance preserving goal is attained. We introduce PEx-the projection explorer - a visualization tool for mapping and exploration of high-dimensional data via projections. A set of examples - on both structured (table) and unstructured (text) data - illustrate how projection based visualizations, coupled with appropriate exploration tools, offer a flexible set-up for multidimensional data exploration. The projections in PEx handle relatively large data sets at a computational cost adequate to user interaction.
Keywords :
data structures; data visualisation; user interfaces; computational cost; dimensional reduction; distance relationships; force directed point placement; projection explorer; projection-based multidimensional visualization; user interaction; visual representations; Cognitive science; Computational efficiency; Computer graphics; Data analysis; Data visualization; Eigenvalues and eigenfunctions; Image processing; Multidimensional systems; Navigation; Principal component analysis;
Conference_Titel :
Computer Graphics and Image Processing, 2007. SIBGRAPI 2007. XX Brazilian Symposium on
Conference_Location :
Minas Gerais
Print_ISBN :
978-0-7695-2996-7
DOI :
10.1109/SIBGRAPI.2007.21