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Fun with Flags: Robust Principal Directions via Flag Manifolds
April 2, 2024, 7:45 p.m. | Nathan Mankovich, Gustau Camps-Valls, Tolga Birdal
cs.LG updates on arXiv.org arxiv.org
Abstract: Principal component analysis (PCA), along with its extensions to manifolds and outlier contaminated data, have been indispensable in computer vision and machine learning. In this work, we present a unifying formalism for PCA and its variants, and introduce a framework based on the flags of linear subspaces, ie a hierarchy of nested linear subspaces of increasing dimension, which not only allows for a common implementation but also yields novel variants, not explored previously. We begin …
abstract analysis arxiv computer computer vision cs.cv cs.lg data extensions framework fun linear machine machine learning math.dg math.oc outlier pca robust stat.ml type variants via vision work
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