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Subhrajyoty Roy

dblp:247/5691 · DBLP profile ↗
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1ranked-venue papers
1as first author
1since 2021 · last 2024
—ORCID · none

Domains — the database's venue-derived domains; a paper can count in several

Artificial intelligence and machine learning · 1 · 1 first-author · 1 since 2021

Expertise — from the expertise taxonomy: the topics of the expert's papers under the CCF categories. A weight counts papers with recency: 1 for a paper about the topic, 0.3 when the topic is its context, halved every five years.

Artificial intelligence
1 paper
Representation and self-supervised learning · 67% 3D vision · 33%

Topics — the 3 heaviest of 4, each with the papers that count most for it

TopicWeightPapersLastEvidence papers
Machine learning › Representation and self-supervised learning › representation learning
dimensionality reduction
0.812024
Robust Principal Component Analysis using Density Power Divergence · J. Mach. Learn. Res. 2024
Computer vision › 3D vision
robust estimation
0.812024
Robust Principal Component Analysis using Density Power Divergence · J. Mach. Learn. Res. 2024
Machine learning › Representation and self-supervised learning › component analysis
robust principal component analysis
0.812024
Robust Principal Component Analysis using Density Power Divergence · J. Mach. Learn. Res. 2024

Methods — techniques the papers use, named apart from their topics

minimum divergence estimation · 0.8m-estimation · 0.8
YearPublicationVenuePosition
2024 Robust Principal Component Analysis using Density Power Divergence
abstract
Principal component analysis (PCA) is a widely employed statistical tool used primarily for dimensionality reduction. However, it is known to be adversely affected by the presence of outlying observations in the sample, which is quite common. Robust PCA methods using M-estimators have theoretical benefits, but their robustness drop substantially for high dimensional data. On the other end of the spectrum, robust PCA algorithms solving principal component pursuit or similar optimization problems have high breakdown, but lack theoretical richness and demand high computational power compared to the M-estimators. We introduce a novel robust PCA estimator based on the minimum density power divergence estimator. This combines the theoretical strength of the M-estimators and the minimum divergence estimators with a high breakdown guarantee regardless of data dimension. We present a computationally efficient algorithm for this estimate. Our theoretical findings are supported by extensive simulations and comparisons with existing robust PCA methods. We also showcase the proposed algorithm's applicability on two benchmark data sets and a credit card transactions data set for fraud detection.
Subhrajyoty Roy, Ayanendranath Basu, Abhik Ghosh
J. Mach. Learn. Res.1