Computational Photography for Dust and Scratch Detection on Transparent Photographic Material

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Publisher: SMPTE — White Plains, NY
Doc Type: Conference Paper
Content Type: Original Research
Volume: 2012, No. 10, pp. 1–8
Abstract: This work pertains the digital restoration of motion-picture films. A new method for the automatic detection of blemishes on any kind of transparent photographic material (still and moving images, silver-based and dye-based material) is presented. It consists in an innovative combination of different optical techniques and computational photography. The image layer is a random dispersion of microscopic elements (e.g. silver particles in b&w material) and its interaction with light is isotropic. Dust, scratches and other irregularities of the film surface produce shadows and reflections that are strongly dependent on the provenance of light. The acquisition of multiple images with different geometries of illumination, and the analysis of the differences between them, is found to be an effective method to emphasize irregularities in the film surface. Moreover, the analysis with polarized light is found to improve the blemish detection. The experiments show that the innovative method effectively detects flaws on photographic film surface.
Publication Date: 2012-10-01
DOI: 10.5594/M001457
Link: https://doi.org/10.5594/M001457
Author(s): Giorgio TrumpyImaging & Media Lab, Bernoullistrasse 32 - Basel CH-4056
Rudolf GschwindImaging & Media Lab, Bernoullistrasse 32 - Basel CH-4056
Copyright: © 2012 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

1. Buisson O. Boukir S. Besserer B. , “Motion compensated film restoration,” Machine Vision and Applications , 13 : 201 – 212 , 2003 . EXTERNAL
2. Albert E.D. , U.S. Patent No.5 266 805, Nov. 30, 1993 . EXTERNAL
3. Mead T. W. , U.S. Patent No.8 009 190, Aug. 30, 2011 . EXTERNAL
4. Zelenka T. , Deutsches Patent und Markenamt No.101 37 340, Feb. 20, 2003 . EXTERNAL
5. Bicout D. , “Depolarization of multiply scattered waves by spherical diffusers: Influence of the size parameter,” Phys. Rev. E , 49 : 1767 – 1770 , February 1994 . EXTERNAL

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Giorgio Trumpy and Rudolf Gschwind; Computational Photography for Dust and Scratch Detection on Transparent Photographic Material, SMPTE Meetings and Conferences ( October 2012); SMPTE, 2012. Available at https://doi.org/10.5594/M001457

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Giorgio Trumpy and Rudolf Gschwind; Computational Photography for Dust and Scratch Detection on Transparent Photographic Material, SMPTE Meetings and Conferences ( October 2012); SMPTE, 2012. Available at https://doi.org/10.5594/M001457

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<span class="citation">Giorgio Trumpy and Rudolf Gschwind; <cite>Computational Photography for Dust and Scratch Detection on Transparent Photographic Material</cite>, SMPTE Meetings and Conferences ( October 2012); SMPTE, 2012. Available at <a href="https://doi.org/10.5594/M001457" target="_blank" rel="noopener">https://doi.org/10.5594/M001457</a></span>

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Giorgio Trumpy and Rudolf Gschwind; <cite id="bib-10-5594-m001457">Computational Photography for Dust and Scratch Detection on Transparent Photographic Material</cite>, SMPTE Meetings and Conferences ( October 2012); SMPTE, 2012
<span class="doi">10.5594/M001457</span>
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