Title:	Coloured visualisation for numerical modelling
Authors:	Cossu, Rossella
Citation:	Journal of WSCG. 2001, vol. 9, no. 1-3.
Issue Date:	2001
Publisher:	Václav Skala - UNION Agency
Document type:	článek article
URI:	http://hdl.handle.net/11025/15792 http://wscg.zcu.cz/wscg2001/WSCG2001_Program.htm
ISSN:	1213-6972 (print) 1213-6980 (CD-ROM) 1213-6964 (online)
Keywords:	barevné modely;vědecká vizualizace;skalární data;vektorová data
Keywords in different language:	colour models;scientific visualisation;scalar data;vector data
Abstract in different language:	In this paper scalar and vector data are visualised by suited colour scales based on perceptive and uniform colour models. Using opportune colour scales, colour information is created from the two-dimensional scalar data computed at different time steps. Direction and magnitude of computed vector data are represented employing circular colour look-up tables (LKT). In a scientific computing environment focused on analysis and interpretation of physical phenomena, the coloured visualisation of data generated by numerical simulations represents a fundamental fashion of knowledge. The colour, in fact, can help the researcher to analyse and interpret information present in computed data in a fast and immediate way. The colour human perception is a complex process, which includes physiological, psychophysical, psychological and physical aspects. A colour model (colour space) is a way adopted to represent and describe a colour using three co-ordinates. We visualise the results obtained by a finite difference method applied to the solution of 2D shallow water equations for the simulation of water circulation in natural basin: the San Pablo Bay. We show solutions of the two-dimensional shallow water equations (SWEs), that is, solutions of quasi linear hyperbolic partial differential equations, governing the water circulation in a basin with spatial dimensions significantly greater than the water depth.
Rights:	© Václav Skala - UNION Agency
Appears in Collections:	Volume 9, number 1-3 (2001)

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