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

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dc.contributor.authorSmith, Kaleighen_US
dc.contributor.authorLandes, Pierre-Edouarden_US
dc.contributor.authorThollot, Joelleen_US
dc.contributor.authorMyszkowski, Karolen_US
dc.date.accessioned2015-02-21T16:18:27Z
dc.date.available2015-02-21T16:18:27Z
dc.date.issued2008en_US
dc.description.abstractThis 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.en_US
dc.description.number2en_US
dc.description.seriesinformationComputer Graphics Forumen_US
dc.description.volume27en_US
dc.identifier.doi10.1111/j.1467-8659.2008.01116.xen_US
dc.identifier.issn1467-8659en_US
dc.identifier.pages193-200en_US
dc.identifier.urihttps://doi.org/10.1111/j.1467-8659.2008.01116.xen_US
dc.publisherThe Eurographics Association and Blackwell Publishing Ltden_US
dc.titleApparent Greyscale: A Simple and Fast Conversion to Perceptually Accurate Images and Videoen_US
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