pca

First per-image PCA decomposition of the 24-image Kodak PCD0992 suite reveals deliberate curation spanning two orders of magnitude in inter-channel redundancy.

Spectral Tempering (SpecTemp) proposes a learning-free method for embedding compression in dense passage retrieval that adaptively determines optimal spectral scaling based on signal-to-noise ratio analysis, outperforming fixed hyperparameter approaches like PCA and whitening.