Matching the Human Visual System, Balancing Bit Depth, High Dynamic Range and Coding Efficiency

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Publisher: SMPTE — White Plains, NY
Doc Type: Conference Paper
Content Type: Original Research
Volume: 2011, No. 1, pp. 1–15
Abstract: The human visual system sensitivity is not linear: it requires much more detail in the low values. This phenomenon has been generally modelled by a logarithmic relation between magnitude and sensation. This aspect of the visual sensation has always been implemented in various ways in high quality imaging systems, from the 2.2 gamma in legacy video to logarithmic coding for film scanned content and 2.6 coding for Digital Cinema. As a result, we have multiple domains with complicated exchange, specific computations with ad hoc parameters, rounding errors and degradation arising from multiple coding decoding concatenations. It is possible to avoid these complications and have a unified system by using “Unsigned floating point” which is a simple extension to floating point “half” format. The additional benefits are a very high dynamic range, a built-in logarithmic law and an efficient use of codes.
Publication Date: 2011-10-01
DOI: 10.5594/M001096
Link: https://doi.org/10.5594/M001096
Author(s): François HeltDOREMI Technologies, 1900 route des Crêtes, BP298, 06905 Sophia-Antipolis, France
Keyword(s): Human Visual System, Perception
Copyright: © 2011 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

[1] ISO/IEC/IEEE 754-2008 see also http://www.openexr.com . EXTERNAL
[2] Bass M. , Handbook of Optisc Volume II - Devices, Measurements and Properties , 2nd Ed. , McGraw-Hill 1995 . EXTERNAL
[3] Cornsweet T. N. ( 1970 ) Visual Perception . Academic Press , New York . EXTERNAL
[4] Hubel D. H. ( 1988 ), Eye brain and Vision , W.H. Freeman New York . EXTERNAL
[5] Neumann A. , “Accurate Display Gamma Functions Based on Human Observation” , Proc. Color Research and Applications , vol. 32 , n°4 , pp 310 – 319 , 2007 . EXTERNAL
[6] APD - DRAFT SMPTE ST 2065-2:2011/ADX - DRAFT SMPTE ST 2065-2:2011. EXTERNAL

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François Helt; Matching the Human Visual System, Balancing Bit Depth, High Dynamic Range and Coding Efficiency, SMPTE Meetings and Conferences ( October 2011); SMPTE, 2011. Available at https://doi.org/10.5594/M001096

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François Helt; Matching the Human Visual System, Balancing Bit Depth, High Dynamic Range and Coding Efficiency, SMPTE Meetings and Conferences ( October 2011); SMPTE, 2011. Available at https://doi.org/10.5594/M001096

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<span class="citation">François Helt; <cite>Matching the Human Visual System, Balancing Bit Depth, High Dynamic Range and Coding Efficiency</cite>, SMPTE Meetings and Conferences ( October 2011); SMPTE, 2011. Available at <a href="https://doi.org/10.5594/M001096" target="_blank" rel="noopener">https://doi.org/10.5594/M001096</a></span>

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François Helt; Matching the Human Visual System, Balancing Bit Depth, High Dynamic Range and Coding Efficiency, SMPTE Meetings and Conferences ( October 2011); SMPTE, 2011
doi: 10.5594/M001096
url: https://doi.org/10.5594/M001096

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<li>
François Helt; <cite id="bib-10-5594-m001096">Matching the Human Visual System, Balancing Bit Depth, High Dynamic Range and Coding Efficiency</cite>, SMPTE Meetings and Conferences ( October 2011); SMPTE, 2011
<span class="doi">10.5594/M001096</span>
</li>