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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

ExplorerTree: A Focus+Context Exploration Approach for 2D Embeddings

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Author(s):
Marcilio-Jr, Wilson E. ; Eler, Danilo M. [1] ; Paulovich, V, Fernando ; Rodrigues-Jr, Jose F. ; Artero, Almir O. [1]
Total Authors: 5
Affiliation:
[1] Marcilio-Jr, Jr., Wilson E., Sao Paulo State Univ UNESP, Fac Sci & Technol, Presidente Prudente, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: BIG DATA RESEARCH; v. 25, JUL 15 2021.
Web of Science Citations: 0
Abstract

In exploratory tasks involving high-dimensional datasets, dimensionality reduction (DR) techniques help analysts to discover patterns and other useful information. Although scatter plot representations of DR results allow for cluster identification and similarity analysis, such a visual metaphor presents problems when the number of instances of the dataset increases, resulting in cluttered visualizations. In this work, we propose a scatter plot-based multilevel approach to display DR results and address clutter related problems when visualizing large datasets, together with the definition of a methodology to use focus+context interaction on non-hierarchical embeddings. The proposed technique, called ExplorerTree, uses a sampling selection technique on scatter plots to reduce visual clutter and guide users through exploratory tasks. We demonstrate ExplorerTree's effectiveness through a use case, where we visually explore activation images of the convolutional layers of a neural network. Finally, we also conducted a user experiment to evaluate ExplorerTree's ability to convey embedding structures using different sampling strategies. (C) 2021 Elsevier Inc. All rights reserved. (AU)

FAPESP's process: 16/11707-6 - Employing overlapping removal and representatives identification techniques in visualizations based on multidimensional projection
Grantee:Wilson Estécio Marcílio Júnior
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 17/17450-0 - Hierarchical exploration on visual representations generated by multidimentional projections
Grantee:Wilson Estécio Marcílio Júnior
Support Opportunities: Scholarships abroad - Research Internship - Master's degree
FAPESP's process: 18/17881-3 - Multilevel visual representation to assist the exploration of data sets
Grantee:Danilo Medeiros Eler
Support Opportunities: Regular Research Grants
FAPESP's process: 18/25755-8 - Multilevel visual representation to assist the exploration of data sets
Grantee:Wilson Estécio Marcílio Júnior
Support Opportunities: Scholarships in Brazil - Technical Training Program - Technical Training