Color Space Conversion with 3-D LUT for Laser Film Recorder

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Publisher: SMPTE — White Plains, NY
Doc Type: Conference Paper
Content Type: Original Research
Volume: 2001, No. 35, pp. 1–13
Abstract: A new method of color space conversion for the laser film recorder is proposed. The input image file (10 bits or more, RGB) is converted by a new three-dimensional look up table (3-D lut), then fed to the film recorder as data of 10 bit RGB. By using this conversion method, the image on print films are colorimetrically improved and matched to the image on the CRT monitor. The paper reviews the color transformation by the conventional film recording, that uses only a one-dimensional lut, then, the 3-D lut is built based on a gamut mapping algorithm to compensate for the difference of the color gamut between the CRT monitors and the print films employing a new soft clipping method. Also, three gamut compression (clipping) methods are evaluated. The calculation on the 3-D lut is based on CIE LAB color coordinates and the evaluation was performed by several observers from the post-production department. The paper additionally discusses a guideline for quality control in color management in film laboratories. This new system was successfully applied to actual production of feature animation footages.
Publication Date: 2001-11-01
DOI: 10.5594/M00975
Link: https://doi.org/10.5594/M00975
Author(s): Ado IshiiEngineering Solutions Division of Imagica Corp., Tokyo, Japan
Copyright: © 2001 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

1. Hunt R.W.G. , “The reproduction of colour” , Fifth Edition , Chapter 9, Fountain Press ( 1995 ). EXTERNAL
2. Ohta N. , “Interrelation between spectral sensitivities and interimage Effects” , Journal of Imaging Science , 35 , 94 – 103 ( 1991 ). EXTERNAL
3. Morovic J. Luo M. R. , “Gamut mapping algorithm based on psychophisical experiment” , in Proc. of the 5th IS&T/SID Color Imaging Conf., pp. 44 – 49 ( 1997 ). EXTERNAL
4. Katoh N. Itoh M. Ohno S. , “Three-dimensional gamut mapping using various color difference formulae and color spaces” , J. Electron. Imaging 8 ( 4 ), 365 – 379 ( 1999 ). EXTERNAL
5. Herzog P. G. Büring H. , “Optimizing Gamut Mapping: Lightness and Hue Adjustments” , in Proc. of the 7th IS&T/SID Color Imaging Conf., pp. 160 – 166 ( 1999 ). EXTERNAL

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Ado Ishii; Color Space Conversion with 3-D LUT for Laser Film Recorder, SMPTE Meetings and Conferences ( November 2001); SMPTE, 2001. Available at https://doi.org/10.5594/M00975

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Ado Ishii; Color Space Conversion with 3-D LUT for Laser Film Recorder, SMPTE Meetings and Conferences ( November 2001); SMPTE, 2001. Available at https://doi.org/10.5594/M00975

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Ado Ishii; Color Space Conversion with 3-D LUT for Laser Film Recorder, SMPTE Meetings and Conferences ( November 2001); SMPTE, 2001. Available at https://doi.org/10.5594/M00975

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<span class="citation">Ado Ishii; <cite>Color Space Conversion with 3-D LUT for Laser Film Recorder</cite>, SMPTE Meetings and Conferences ( November 2001); SMPTE, 2001. Available at <a href="https://doi.org/10.5594/M00975" target="_blank" rel="noopener">https://doi.org/10.5594/M00975</a></span>

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Ado Ishii; Color Space Conversion with 3-D LUT for Laser Film Recorder, SMPTE Meetings and Conferences ( November 2001); SMPTE, 2001
doi: 10.5594/M00975
url: https://doi.org/10.5594/M00975

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Ado Ishii; <cite id="bib-10-5594-m00975">Color Space Conversion with 3-D LUT for Laser Film Recorder</cite>, SMPTE Meetings and Conferences ( November 2001); SMPTE, 2001
<span class="doi">10.5594/M00975</span>
</li>