A Multispectral Scanning and Post-Processing Workflow for Historical Film Colors

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Publisher: SMPTE — Pasadena, CA
Doc Type: Conference Paper
Content Type: Original Research
Volume: 00, pp. 1–11
Abstract: The vast range of historical film color processes necessitates advanced workflows for scanning and post-processing to obtain digital representations that faithfully render the multitude of dyes and pigments present in archival materials. Our previous research indicates that optical configurations in traditional scanners limited to three or four spectral bands often fail to record important color information. To comply with core principles of future-proof digitization workflows, scanner properties and post-processing should be transparent, measurable, and science-based. A multispectral digitization workflow that uses a uniform distribution of spectral bands across the visible spectrum can significantly improve results and provides reliable documentation of heterogeneous archival color film stocks. It also enhances versatility for innovative renderings compatible with future projection technologies and visualization pipelines. Reducing subjective interventions in film digitization remains a cornerstone of restoration ethics. Multispectral scanning directly leverages the information embedded in historical film stocks, enabling a robust, material-based technology that respects the unique properties of each film element. An integrated multispectral digitization and post-processing chain supports physically accurate rendering of scans by including measurements from various types of cinema projection illuminants. The ultimate goal of this workflow is to represent the color appearance as it would have been perceived on the cinema screen. When multiple film elements must be integrated into a digitization and restoration project—such as negatives and several positives, later prints on differing color film stocks, or black-and-white separations—a comprehensive, scientific methodology is essential for achieving a consistent aesthetic representation of diverse source materials with style transfer. Building on more than a decade of research into the technology and aesthetics of historical film colors and scanning, we have integrated this knowledge into a practical solution.
Publication Date: 2025-10-13
ISBN: Electronic: 978-1-61482-966-9
Author(s): Barbara Flueckiger
Giorgio Trumpy
Keyword(s): Digitization, Multispectral Scanning, Film Color, Color Science, Cultural Heritage
Copyright: © 2025 SMPTE

Bibliographic Reference(s)

See FIAF Code of Ethics, Third Edition. Brussels: Fédération Internationale des Archives du Film, 2008. EXTERNAL
B. Flueckiger Investigation of Film Material-Scanner Interaction. Report, 2018. EXTERNAL
R. Gschwind. Simulating and Optimizing the Colour Reproduction of Photographic Materials. In Colour Imaging Systems. Royal Photographic Society: 4–12, 1986. EXTERNAL
Deutsches Institut für Normung. Empfehlungen. zur Digitalisierung von kinematografischem Film. DIN SPEC 15587, 2019. EXTERNAL
G. Trumpy “Chromatic Callier Effect and its Repercussions on the Digitization of Early Film Colors”, Journal of Imaging Science and Technology, 63 (1):10506–1-11, January 2019. EXTERNAL
H. G. MacPherson. “Suggested Classification of Carbon Arc Terminology as Applied to Pictures,” International Projectionist. 17 18, 1942. EXTERNAL
D. Pfluger Spectra of Projection Light Sources Used for Analogue Cinema Projection. 33. Report, 2023. EXTERNAL
CIE. Colorimetry- Part 1: CIE Standard Colorimetric Observers, 2019. EXTERNAL
D. B. Judd, “Report of U.S. Secretariat Committee on Colorimetry and Artificial Daylight,” Proceedings of the Twelfth Session of the CIE 1:11, 1951. EXTERNAL
D. H. Brainard “Colorimetry.” The Optical Society of America Handbook of Optics, 3rd edition, Volume III: Vision and Vision Optics. New York:McGraw Hill, 2010. EXTERNAL
G. Trumpy “A Multispectral Design for a New Generation of Film Scanners”, in Proc. SPIE 11784, Optics for Arts, Architecture, and Archaeology VIII, 117840Z: 8 July 2021. EXTERNAL
G. Trumpy “Style Transfer in Advanced Film Digitization and Rendering Workflows,” Research Culture and Science Books. Gruppo del Colore, Associazione Italiana Colore: 137–143, 2025. EXTERNAL

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Barbara Flueckiger and Giorgio Trumpy; A Multispectral Scanning and Post-Processing Workflow for Historical Film Colors, MTS 2025, Article 1 (pp. 1 to 11); SMPTE, 2025, ISBN: 978-1-61482-966-9

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Barbara Flueckiger and Giorgio Trumpy; A Multispectral Scanning and Post-Processing Workflow for Historical Film Colors, MTS 2025, Article 1 (pp. 1 to 11); SMPTE, 2025, ISBN: 978-1-61482-966-9

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Barbara Flueckiger and Giorgio Trumpy; A Multispectral Scanning and Post-Processing Workflow for Historical Film Colors, MTS 2025, Article 1 (pp. 1 to 11); SMPTE, 2025, ISBN: 978-1-61482-966-9

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<span class="citation">Barbara Flueckiger and Giorgio Trumpy; <cite>A Multispectral Scanning and Post-Processing Workflow for Historical Film Colors</cite>, MTS 2025, Article 1 (pp. 1 to 11); SMPTE, 2025, ISBN: 978-1-61482-966-9</span>

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Barbara Flueckiger and Giorgio Trumpy; A Multispectral Scanning and Post-Processing Workflow for Historical Film Colors, MTS 2025, Article 1 (pp. 1 to 11); SMPTE, 2025, ISBN: 978-1-61482-966-9

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Barbara Flueckiger and Giorgio Trumpy; <cite id="bib-978-1-61482-966-9-1">A Multispectral Scanning and Post-Processing Workflow for Historical Film Colors</cite>, MTS 2025, Article 1 (pp. 1 to 11); SMPTE, 2025, ISBN: 978-1-61482-966-9
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