Speed-up Technique for a Local Automatic Colour Equalization Model

dc.contributor.authorArtusi, A.en_US
dc.contributor.authorGatta, C.en_US
dc.contributor.authorMarini, D.en_US
dc.contributor.authorPurgathofer, W.en_US
dc.contributor.authorRizzi, A.en_US
dc.date.accessioned2015-02-21T12:05:10Z
dc.date.available2015-02-21T12:05:10Z
dc.date.issued2006en_US
dc.description.abstractIn this paper we propose a speed-up technique for a local automatic colour equalization operator derived from a model of the human vision system. This method is characterized by local and global filtering effects, that simultaneously achieve different equalization tasks e.g. performing colour and lightness constancy, realizing dynamic image data driven stretching, controlling the contrast. We describe a way to quickly create a filtering mapping function to perform the global component of the mapping. This method is based on singular value decomposition (SVD) applied to sampled and filtered points in the input image. Then, the local information is added computing the basic algorithm on a neighbourhood of each input pixel. A slight quality loss is the price that we have to pay for a speed-up of more than two orders of magnitude of the basic algorithm. We present the results on several images and discuss the efficiency and the drawbacks of the speed-up technique.en_US
dc.description.number1en_US
dc.description.seriesinformationComputer Graphics Forumen_US
dc.description.volume25en_US
dc.identifier.doi10.1111/j.1467-8659.2006.00914.xen_US
dc.identifier.issn1467-8659en_US
dc.identifier.pages5-14en_US
dc.identifier.urihttps://doi.org/10.1111/j.1467-8659.2006.00914.xen_US
dc.publisherThe Eurographics Association and Blackwell Publishing Ltd.en_US
dc.titleSpeed-up Technique for a Local Automatic Colour Equalization Modelen_US
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