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Examining Implicit Discretization in Spectral Schemes
Author(s) -
Quinan P. S.,
Padilla L. M.,
CreemRegehr S. H.,
Meyer M.
Publication year - 2019
Publication title -
computer graphics forum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 120
eISSN - 1467-8659
pISSN - 0167-7055
DOI - 10.1111/cgf.13695
Subject(s) - discretization , hue , rainbow , computer science , lightness , trace (psycholinguistics) , visualization , consistency (knowledge bases) , exploratory research , class (philosophy) , artificial intelligence , mathematics , mathematical analysis , linguistics , philosophy , physics , quantum mechanics , sociology , anthropology
Two of the primary reasons rainbow color maps are considered ineffective trace back to the idea that they implicitly discretize encoded data into hue‐based bands, yet no research addresses what this discretization looks like or how consistent it is across individuals. This paper presents an exploratory study designed to empirically investigate the implicit discretization of common spectral schemes and explore whether the phenomenon can be modeled by variations in lightness, chroma, and hue. Our results suggest that three commonly used rainbow color maps are implicitly discretized with consistency across individuals. The results also indicate, however, that this implicit discretization varies across different datasets, in a way that suggests the visualization community's understanding of both rainbow color maps, and more generally effective color usage, remains incomplete.