2026-04-17T12:58:23Zhttps://recercat.cat/oai/request

oai:recercat.cat:10256/116622024-06-18T12:15:48Zcom_2072_452955com_2072_2054col_2072_453069

00925njm 22002777a 4500 dc Bramon Feixas, Roger author Ruiz Altisent, Marc author Bardera i Reig, Antoni author Boada, Imma author Feixas Feixas, Miquel author Sbert, Mateu author info:eu-repo/date/embargoEnd/2026-01-01 info:eu-repo/date/embargoEnd/2026-01-01 2013 Different quality metrics have been proposed in the literature to evaluate how well a visualization represents the underlying data. In this paper, we present a new information-theoretic framework that quantifies the information transfer between the source data set and the rendered image. This approach is based on the definition of an observation channel whose input and output are given by the intensity values of the volumetric data set and the pixel colors, respectively. From this channel, the mutual information, a measure of information transfer or correlation between the input and the output, is used as a metric to evaluate the visualization quality. The usefulness of the proposed observation channel is illustrated with three fundamental visualization applications: selection of informative viewpoints, transfer function design, and light positioning This work has been funded in part by grants from the Spanish Government (Nr. TIN2010-21089-C03-01) and from the Catalan Government (Nr. 2009-SGR-643). This work has also been supported by SUR of DEC of Generalitat de Catalunya (Catalan Government). http://hdl.handle.net/10256/11662 Informació, Teoria de la Information theory Visualització (Informàtica) Information display systems Infografia Computer graphics An information-theoretic observation channel for volume visualization