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

Enrico Bertini; Giuseppe Santucci

doi:10.1117/12.586930

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

Enrico Bertini, Giuseppe Santucci

Research output: Contribution to journal › Conference article › peer-review

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.

Original language	English (US)
Article number	17
Pages (from-to)	158-167
Number of pages	10
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	5669
DOIs	https://doi.org/10.1117/12.586930
State	Published - 2005
Event	Proceedings of SPIE-IS and T Electronic Imaging - Visualization and Data Analysis 2005 - San Jose, CA, United States Duration: Jan 17 2005 → Jan 18 2005

Keywords

Data sampling
Quality metrics
User studies
Visual clutter

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

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10.1117/12.586930

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

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.",

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AU - Santucci, Giuseppe

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