Per-channel regularization for regression-based spectral reconstruction

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Lin, Yi Tun and Finlayson, Graham D. (2020) Per-channel regularization for regression-based spectral reconstruction. CEUR Workshop Proceedings, 2688. ISSN 1613-0073

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Abstract

Spectral reconstruction algorithms seek to recover spectra from RGB images. This estimation problem is often formulated as least-squares regression, and a Tikhonov regularization is generally incorporated, both to support stable estimation in the presence of noise and to prevent over-fitting. The degree of regularization is controlled by a single penalty-term parameter, which is often selected using the cross validation experimental methodology. In this paper, we generalize the simple regularization approach to admit a per-spectral-channel optimization setting, and a modified cross-validation procedure is developed. Experiments validate our method. Compared to the conventional regularization, our per-channel approach significantly improves the reconstruction accuracy at multiple spectral channels, by up to 17% increments for all the considered models.

Item Type:	Article
Uncontrolled Keywords:	hyperspectral imaging,multispectral imaging,spectral reconstruction,computer science(all) ,/dk/atira/pure/subjectarea/asjc/1700
Faculty \ School:	Faculty of Science > School of Computing Sciences
UEA Research Groups:	Faculty of Science > Research Groups > Colour and Imaging Lab
Related URLs:	http://www.scopus.com/inward/record.url?...
Depositing User:	LivePure Connector
Date Deposited:	14 Nov 2020 01:15
Last Modified:	31 Jan 2024 02:50
URI:	https://ueaeprints.uea.ac.uk/id/eprint/77689
DOI:

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