EMIYA , Valentin

Convex nonnegative matrix factorization (CNMF) is a variant of nonnegative matrix factorization (NMF) in which the components are a convex combination of atoms of a known dictionary. In this contribution, we propose to extend CNMF to the case where the data matrix and the dictionary have missing entries. After a formulation of the problem in...

L'analyse archétypale (AA), ou factorisation convexe en matrices non-négatives (CNMF), est une variante de la factorisation en matrices non-négatives (NMF), dans laquelle les composantes obtenues sont exprimées comme une combinaison convexe d'exemples appelés archétypes. Dans cette contribution, nous proposons d'étendre AA/CNMF au...

Many spectral unmixing methods rely on the non-negative decomposition of spectral data onto a dictionary of spectral templates. In particular, state-of-the-art music transcription systems decompose the spectrogram of the input signal onto a dictionary of representative note spectra. The typical measures of fit used to quantify the adequacy of...