A Color-Volume Mapping System for Perception-Accurate Reproduction of HDR Imagery in SDR production workflows

Metadata

Publisher: SMPTE — White Plains, NY, USA
Doc Type: Conference Paper
Content Type: Original Research
Volume: 2020, No. 11, pp. 1–16
Abstract: The usage of wide color-volumes within cameras during image acquisition is common nowadays. However, these color-volumes are mostly manufacturer-specific and often get minimized into a standardized color-system, such as ITU-R BT.709. The outstanding color-capture-characteristics of prevailing image sensors therefore do not get used enough yet. Most image reproduction devices won't be able to display HDR/WCG content accurately in the near future. This justifies the current development of products that convert HDR/WCG-imagery to SDR/SCG-imagery with the aim of keeping the original look. The often overlooked aspect of color-volume transformations as a conversion process is of particular importance. Patented or trademarked colors (eg. Coca-Cola Red) should cause the same visual impression on all reproduction devices. Visual artefacts, such as hueshifts, banding or constant color regions instead of differentiated colors, caused by clipped or incorrect converted colors could violate this rule. Tonemapping is usually performed to transform HDR to SDR content. The difference in brightness between HDR and SDR is most visible. Rarely an accurate color-volume transformation is performed. A novel HDR/WCG-SDR/SCG-transformation-algorithm is presented in this paper. It can be used on images after tonemapping, or as a static conversion method between HDR/WCG and SDR/SCG. The aim of the algorithm is to convert colors from a large source color-volume into a smaller target color-volume so that converted colors stay distinguishable and no clipping is necessary. Patent pending EP20188496.2.
Publication Date: 2020-11-10
DOI: 10.5594/M001921
Link: https://doi.org/10.5594/M001921
Author(s): Pascal KutschbachBachelor of Engineering Media Technology, Hochschule RheinMain - University of Applied Sciences, Wiesbaden, Germany
Keyword(s): HDR, Wide Color Gamut, Color Gamut, Standard Color Gamut, Color Mapping, Gamut Mapping, Gamut Compression, Color Space Conversion, HDR-SDR Conversion
Copyright: © 2020 Society of Motion Picture and Television Engineers, Inc.

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SMPTE ST 2084:2014 [Active, Stabilized]

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Pascal Kutschbach; A Color-Volume Mapping System for Perception-Accurate Reproduction of HDR Imagery in SDR production workflows, SMPTE Meetings and Conferences ( November 2020); SMPTE, 2020. Available at https://doi.org/10.5594/M001921

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Pascal Kutschbach; A Color-Volume Mapping System for Perception-Accurate Reproduction of HDR Imagery in SDR production workflows, SMPTE Meetings and Conferences ( November 2020); SMPTE, 2020. Available at https://doi.org/10.5594/M001921

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<span class="citation">Pascal Kutschbach; <cite>A Color-Volume Mapping System for Perception-Accurate Reproduction of HDR Imagery in SDR production workflows</cite>, SMPTE Meetings and Conferences ( November 2020); SMPTE, 2020. Available at <a href="https://doi.org/10.5594/M001921" target="_blank" rel="noopener">https://doi.org/10.5594/M001921</a></span>

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Pascal Kutschbach; <cite id="bib-10-5594-m001921">A Color-Volume Mapping System for Perception-Accurate Reproduction of HDR Imagery in SDR production workflows</cite>, SMPTE Meetings and Conferences ( November 2020); SMPTE, 2020
<span class="doi">10.5594/M001921</span>
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