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  Apparent Greyscale: A Simple and Fast Conversion to Perceptually Accurate Images and Video

Smith, K., Landes, P.-E., Thollot, J., & Myszkowski, K. (2008). Apparent Greyscale: A Simple and Fast Conversion to Perceptually Accurate Images and Video. In G. Drettakis, & R. Scopigno (Eds.), The European Association for Computer Graphics 29th Annual Conference, EUROGRAPHICS 2008 (pp. 193-200). Oxford: Blackwell.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-000F-1AF9-D Version Permalink: https://hdl.handle.net/11858/00-001M-0000-000F-1AFA-B
Genre: Conference Paper

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 Creators:
Smith, Kaleigh1, Author           
Landes, Pierre-Edouard, Author
Thollot, Jöelle, Author
Myszkowski, Karol1, Author           
Affiliations:
1Computer Graphics, MPI for Informatics, Max Planck Society, ou_40047              

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 Abstract: This paper presents a quick and simple method for converting complex images and video to perceptually accurate greyscale versions. We use a two-step approach first to globally assign grey values and determine colour ordering, then second, to locally enhance the greyscale to reproduce the original contrast. Our global mapping is image independent and incorporates the Helmholtz-Kohlrausch colour appearance effect for predicting differences between isoluminant colours. Our multiscale local contrast enhancement reintroduces lost discontinuities only in regions that insufficiently represent original chromatic contrast. All operations are restricted so that they preserve the overall image appearance, lightness range and differences, colour ordering, and spatial details, resulting in perceptually accurate achromatic reproductions of the colour original.

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Language(s): eng - English
 Dates: 2009-03-192008
 Publication Status: Issued
 Pages: -
 Publishing info: Oxford : Blackwell
 Table of Contents: -
 Rev. Type: -
 Identifiers: eDoc: 428226
DOI: 10.1111/j.1467-8659.2008.01116.x
URI: http://dx.doi.org/10.1111/j.1467-8659.2008.01116.x
Other: Local-ID: C125756E0038A185-E88EBE366EBA274FC1257495005568E5-Smith2008
 Degree: -

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Title: Untitled Event
Place of Event: Crete, Greece
Start-/End Date: 2008-04-14 - 2008-04-18

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Source 1

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Title: The European Association for Computer Graphics 29th Annual Conference, EUROGRAPHICS 2008
Source Genre: Proceedings
 Creator(s):
Drettakis, George, Editor
Scopigno, Roberto, Editor
Affiliations:
-
Publ. Info: Oxford : Blackwell
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 193 - 200 Identifier: -

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Title: Computer Graphics Forum
Source Genre: Series
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Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: -