Avoiding Chromaticity Creep with PseudoGrey

dc.contributor.authorGrimstead, I. J.en_US
dc.contributor.authorAvis, N. J.en_US
dc.contributor.editorA. Day and R. Mantiuk and E. Reinhard and R. Scopignoen_US
dc.date.accessioned2014-02-06T15:10:43Z
dc.date.available2014-02-06T15:10:43Z
dc.date.issued2011en_US
dc.description.abstractWe examine the calibration of Commodity, Off-The-Shelf (COTS) monitors to the DICOM GreyScale Display Function (GSDF) standard (as used for medical imaging). We note that uncalibrated and calibrated (using commercial and non-commercial tools) monitors exhibit Chromaticity creep along the black body locus in CIE 1931 colourspace; this is at odds with high-end medical monitors which do not introduce colour-but cost significantly more than COTS colour monitors. Alternative algorithms are investigated to produce a DICOM GSDF compliant calibration, where we take into account both luminance and chromaticity. Using PseudoGrey we generate thousands of shades of grey on a colour monitor to produce a high dynamic range, albeit in greyscale, improving on the standard 256 shades of grey. In this work, we now restrict our introduction of colour to minimise chromaticity deviation from a given white point. We have found various chromatic anomalies with COTS monitors, and discuss our findings along with algorithmic variations to cope with such issues. We believe this work contributes to the availability of a robust method to calibrate COTS colour monitors to the GSDF and hence any required intensity curve whilst retaining a pure colour, enabling greyscale images with over 256 shades to be accurately displayed. This may have significant cost, and potentially improved diagnostic implications, in the reporting of medical radiological images, and could be used to display high dynamic range greyscale imagery (such as multiple exposure black and white photography).en_US
dc.description.seriesinformationEurographics 2011 - Areas Papersen_US
dc.identifier.issn1017-4656en_US
dc.identifier.urihttps://doi.org/10.2312/EG2011/areas/063-070en_US
dc.publisherThe Eurographics Associationen_US
dc.subjectCategories and Subject Descriptors (according to ACM CCS): Computer Graphics [I.3.3]: Viewing algorithms- Computer Graphics [I.4.3]: Greyscale manipulation-Life and Medical Sciences [J.3.c]: Medical information systemsen_US
dc.titleAvoiding Chromaticity Creep with PseudoGreyen_US
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