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Small area colorimetry.

Pointer, M R (2006) Small area colorimetry. NPL Report. DQL-OR 015

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Abstract

This report considers the options available to measure the coloured patches of test charts that can be used to characterise digital cameras to enable them to ‘measure’ colour in a CIE sense. To use a digital camera, as a tristimulus colorimeter requires signal processing to obtain device-independent coordinates, usually CIE tristimulus values, from the output data in the image file, and it is the form and efficiency of this characterisation process that dictates the overall accuracy of the device as a colorimeter. The characterisation of a digital camera using the colorimetric method requires an image of a test chart comprising a suitable number of test patches of known colorimetry. If a traceable path is required, it is necessary to be able to measure the spectral reflectance of each of the test patches using a suitable spectrophotometer that is itself able to provide a traceable path via suitable standard reference standards.

Item Type: Report/Guide (NPL Report)
NPL Report No.: DQL-OR 015
Subjects: Optical Radiation and Photonics
Optical Radiation and Photonics > Materials and Appearance
Last Modified: 02 Feb 2018 13:15
URI: http://eprintspublications.npl.co.uk/id/eprint/3470

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