HyperNP: Interactive Visual Exploration of Multidimensional Projection Hyperparameters

Projection algorithms such as t‐SNE or UMAP are useful for the visualization of high dimensional data, but depend on hyperparameters which must be tuned carefully. Unfortunately, iteratively recomputing projections to find the optimal hyperparameter values is computationally intensive and unintuitiv...

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Bibliographic Details
Published in:Computer graphics forum Vol. 41; no. 3; pp. 169 - 181
Main Authors: Appleby, G., Espadoto, M., Chen, R., Goree, S., Telea, A. C., Anderson, E. W., Chang, R.
Format: Journal Article
Language:English
Published: Oxford Blackwell Publishing Ltd 01.06.2022
Subjects:
Algorithms
CCS Concepts
Human‐centered computing → Visualization techniques
Neural networks
Performance evaluation
Systems analysis
Visualization
ISSN:0167-7055, 1467-8659
Online Access:Get full text
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Summary:Projection algorithms such as t‐SNE or UMAP are useful for the visualization of high dimensional data, but depend on hyperparameters which must be tuned carefully. Unfortunately, iteratively recomputing projections to find the optimal hyperparameter values is computationally intensive and unintuitive due to the stochastic nature of such methods. In this paper we propose HyperNP, a scalable method that allows for real‐time interactive hyperparameter exploration of projection methods by training neural network approximations. A HyperNP model can be trained on a fraction of the total data instances and hyperparameter configurations that one would like to investigate and can compute projections for new data and hyperparameters at interactive speeds. HyperNP models are compact in size and fast to compute, thus allowing them to be embedded in lightweight visualization systems. We evaluate the performance of HyperNP across three datasets in terms of performance and speed. The results suggest that HyperNP models are accurate, scalable, interactive, and appropriate for use in real‐world settings.
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ISSN:0167-7055
1467-8659
DOI:10.1111/cgf.14531