4-Band Multispectral Images Demosaicking Combining LMMSE and Adaptive Kernel Regression Methods.

Fiche publication


Date publication

octobre 2022

Journal

Journal of imaging

Auteurs

Membres identifiés du Cancéropôle Est :
Pr GOUTON Pierre


Tous les auteurs :
Hounsou N, Mahama ATS, Gouton P

Résumé

In recent years, multispectral imaging systems are considerably expanding with a variety of multispectral demosaicking algorithms. The most crucial task is setting up an optimal multispectral demosaicking algorithm in order to reconstruct the image with less error from the raw image of a single sensor. In this paper, we presented a four-band multispectral filter array (MSFA) with the dominant blue band and a multispectral demosaicking algorithm that combines the linear minimum mean square error (LMMSE) and the adaptive kernel regression methods. To estimate the missing blue bands, we used the LMMSE algorithm and for the other spectral bands, the directional gradient method, which relies on the estimated blue bands. The adaptive kernel regression is then applied to each spectral band for their update without persistent artifacts. The experiment results demonstrate that our proposed method outperforms other existing approaches both visually and quantitatively in terms of peak signal-to-noise-ratio (PSNR), structural similarity index (SSIM) and root mean square error (RMSE).

Mots clés

LMMSE, adaptive kernel regression, demosaicking algorithm, multispectral filter array

Référence

J Imaging. 2022 10 25;8(11):