Rediscovering lost colors: film color restoration by hyperspectral imaging and cluster-based spectral correction algorithm (CBSCA)

Catelli, Emilio (avtor), Liu, Lingxi (avtor), Fadanni, Jacopo (avtor), Stergar, Jošt (avtor), Milanič, Matija (avtor), Sciutto, Giorgia (avtor), Zerbetto, Francesco (avtor), Prati, Silvia (avtor)

The present study proposes a new method for the digital restoration of color films affected by irregular color degradation. Color fading is a major problem affecting analog color films and while most existing digital methods address homogeneous dye fading, the correction of irregular color degradation remains a challenging and time-consuming process. The main objective of this work is to develop a scalable and minimally user-guided strategy capable of restoring such complex degradation patterns. The proposed approach combines visible-range hyperspectral imaging of degraded film frames to obtain detailed spectral information with a novel computational algorithm referred as the Cluster-Based Spectral Correction Algorithm (CBSCA). This algorithm is specifically designed to handle the large volume of data recorded by hyperspectral acquisition, enabling robust color restoration while ensuring reduced computational demand and limited subjective intervention. In comparison with conventional RGB scanners and color restoration software, this approach offers a methodology to perform accurate color acquisition and correction while effectively managing large hyperspectral datasets. The ultimate goal is to recover the film's original visual content, ensuring its accessibility to the public.

• Jezik: Angleški jezik
• Ključne besede: color films, digital restoration, hyperspectral imaging, cluster-based spectral correction algorithm, CBSCA
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FMF - Fakulteta za matematiko in fiziko
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2026
• Št. strani: Str. 12511-12523
• Številčenje: Vol. 16, iss. 14
• PID: 20.500.12556/RUL-181116
• UDK: 004.9:791.53
• ISSN pri članku: 2046-2069
• DOI: 10.1039/D5RA08504G
• COBISS.SI-ID: 273009411
• Datum objave v RUL: 25.03.2026

Gradivo je del revije

• Naslov: RSC advances
• Založnik: RSC Publishing
• ISSN: 2046-2069
• COBISS.SI-ID: 2513252

Licence

• Licenca: CC BY-NC 3.0, Creative Commons Priznanje avtorstva-Nekomercialno 3.0 Nedoločena
• Povezava: https://creativecommons.org/licenses/by-nc/3.0/deed.sl
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Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: barvni filmi, digitalno restavriranje, hiperspektralno slikanje, CBSCA algoritem

Projekti

• Financer: Drugi - Drug financer ali več financerjev
• Številka projekta: SI18MO03
• Naslov: Advanced imaging technologies for the study of works of art