Multispectral demosaicing using pseudo-panchromatic image

Sofiane Mihoubi (1) , Olivier Losson (1) , Benjamin Mathon (1) , Ludovic Macaire (1)

1 CRIStAL - Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189

Single-sensor color cameras, which classically use a color filter array (CFA) to sample RGB channels, have recently been extended to the multispectral domain. To sample more than three wavelength bands, such systems use a multispectral filter array (MSFA) that provides a raw image in which a single channel value is available at each pixel. A demosaicing procedure is then needed to estimate a fully-defined multispectral image. In this paper, we review multispectral demosaicing methods and propose a new one based on the pseudo-panchromatic image (PPI). Pixel values in the PPI are computed as the average spectral values. Experimental results show that our method provides estimated images of better quality than classical ones.

Mots clés: Multispectral filter array; Spectral correlation; Spatial correlation; Illumination; Pseudo-panchromatic image; Multispectral image demosaicing

Domaines: Traitement du signal et de l'image [eess.SP]

Sofiane Mihoubi, Olivier Losson, Benjamin Mathon, Ludovic Macaire. Multispectral demosaicing using pseudo-panchromatic image. IEEE Transactions on Computational Imaging, 2017, 3 (4), pp.982-995. ⟨10.1109/TCI.2017.2691553⟩. ⟨hal-01507480⟩