Is it darker? Improving density representation in 2D scatter plots through a user study

Enrico Bertini; Giuseppe Santucci

doi:10.1117/12.586930

11 March 2005 Is it darker? Improving density representation in 2D scatter plots through a user study

Enrico Bertini, Giuseppe Santucci

Proceedings Volume 5669, Visualization and Data Analysis 2005; (2005) https://doi.org/10.1117/12.586930
Event: Electronic Imaging 2005, 2005, San Jose, California, United States

Abstract

Density differences are one of the main features users perceive in 2D scatter plots. However, because of pixels’ collisions, some areas become saturated and such differences are lost. To solve this problem, several proposals rely on sampling the dataset before visualizing it. Some of these introduce precise measures to understand the image degradation and use numerical differences in pixels to estimate density differences. It is our opinion that this issue deserves a deeper analysis, taking into account perceptual issues. In this paper we describe a study we conducted to understand the relationship between numerical pixel density and the perceived density. The results obtained were used to refine a sampling technique we developed to preserve relative densities in the context of 2D scatter plots.

Citation Download Citation

Enrico Bertini and Giuseppe Santucci "Is it darker? Improving density representation in 2D scatter plots through a user study", Proc. SPIE 5669, Visualization and Data Analysis 2005, (11 March 2005); https://doi.org/10.1117/12.586930

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