UnProjection: Leveraging Inverse-Projections for Visual Analytics of High-Dimensional Data

• URL: http://arxiv.org/abs/2111.01744v1
• Date: Tue, 2 Nov 2021 17:11:57 GMT
• Title: UnProjection: Leveraging Inverse-Projections for Visual Analytics of High-Dimensional Data
• Authors: Mateus Espadoto, Gabriel Appleby, Ashley Suh, Dylan Cashman, Mingwei Li, Carlos Scheidegger, Erik W Anderson, Remco Chang, Alexandru C Telea
• Abstract summary: We present NNInv, a deep learning technique with the ability to approximate the inverse of any projection or mapping. NNInv learns to reconstruct high-dimensional data from any arbitrary point on a 2D projection space, giving users the ability to interact with the learned high-dimensional representation in a visual analytics system.
• Score: 63.74032987144699
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Projection techniques are often used to visualize high-dimensional data, allowing users to better understand the overall structure of multi-dimensional spaces on a 2D screen. Although many such methods exist, comparably little work has been done on generalizable methods of inverse-projection -- the process of mapping the projected points, or more generally, the projection space back to the original high-dimensional space. In this paper we present NNInv, a deep learning technique with the ability to approximate the inverse of any projection or mapping. NNInv learns to reconstruct high-dimensional data from any arbitrary point on a 2D projection space, giving users the ability to interact with the learned high-dimensional representation in a visual analytics system. We provide an analysis of the parameter space of NNInv, and offer guidance in selecting these parameters. We extend validation of the effectiveness of NNInv through a series of quantitative and qualitative analyses. We then demonstrate the method's utility by applying it to three visualization tasks: interactive instance interpolation, classifier agreement, and gradient visualization.

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