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Chromatic callier effect and its repercussions on the digitization of early film colors


Trumpy, Giorgio; Flückiger, Barbara (2019). Chromatic callier effect and its repercussions on the digitization of early film colors. The Journal of Imaging Science and Technology, 63(1):010506-1-010506-11.

Abstract

The projection on screen has always been the supreme result of cinematography. Thus the digitization of a motion picture should seek to recreate the visual impression in the cinema. The image-forming particles contained in early color films can generate remarkable differences between a film directly observed with diffuse backlighting and its image projected on screen. In the recent decades this discrepancy has been largely overlooked by the film preservation community (film curators, scanner manufacturers, colorists, etc.). This paper re-establishes the importance of referring to the visual impression in the cinema, and describes the spectral variation of the Callier effect that can significantly alter early film colors when digitized. We have introduced the term “chromatic Callier effect” and described its repercussions on film digitization reporting case studies of tinted and toned film prints. The experimental results highlight that important changes are required in the optical design of film scanners to improve the digitization of motion pictures.

Abstract

The projection on screen has always been the supreme result of cinematography. Thus the digitization of a motion picture should seek to recreate the visual impression in the cinema. The image-forming particles contained in early color films can generate remarkable differences between a film directly observed with diffuse backlighting and its image projected on screen. In the recent decades this discrepancy has been largely overlooked by the film preservation community (film curators, scanner manufacturers, colorists, etc.). This paper re-establishes the importance of referring to the visual impression in the cinema, and describes the spectral variation of the Callier effect that can significantly alter early film colors when digitized. We have introduced the term “chromatic Callier effect” and described its repercussions on film digitization reporting case studies of tinted and toned film prints. The experimental results highlight that important changes are required in the optical design of film scanners to improve the digitization of motion pictures.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:06 Faculty of Arts > Institute of Cinema Studies
Dewey Decimal Classification:700 Arts
900 History
Scopus Subject Areas:Physical Sciences > Electronic, Optical and Magnetic Materials
Physical Sciences > General Chemistry
Physical Sciences > Atomic and Molecular Physics, and Optics
Physical Sciences > Computer Science Applications
Language:English
Date:January 2019
Deposited On:21 Feb 2019 13:14
Last Modified:29 Jul 2020 10:22
Publisher:Society for Imaging Science and Technology
ISSN:1943-3522
Additional Information:This article was made available online on 27. September 2018 as a Fast Track article with title: "Chromatic Callier Effect and its Repercussions on the Digitization of Early Film Colors".
OA Status:Closed
Publisher DOI:https://doi.org/10.2352/J.ImagingSci.Technol.2019.63.1.010506
Related URLs:https://ist.publisher.ingentaconnect.com/content/ist/jist (Publisher)
https://www.film.uzh.ch/de/team/postdocs/trumpy.html (Author)
https://www.film.uzh.ch/de/team/people/flueckiger.html (Author)
https://zauberklang.ch/filmcolors/ (Organisation)
Project Information:
  • : FunderH2020
  • : Grant ID670446
  • : Project TitleFilm Colors. An Interdisciplinary Approach.

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