An Efficient ExactPGA Algorithm for Constant Curvature Manifolds
Manifold-valueddatasetsarewidelyencounteredinmanycomputervisiontasks.Anon-linearanalogofthePCAalgorithm,calledthePrincipalGeodesicAnalysis(PGA)algorithmsuitedfordatalyingonRiemannianmanifoldswasreportedinliteratureadecadeago.SincetheobjectivefunctioninthePGAalgorithmishighlynon-linear
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