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Abstract
This paper examines the use of a colour reproduction index as a quality metric for the characterization of ten digital cameras in an attempt to achieve colorimetrically exact reproduction. This essentially extends the use of the index further into the world of digital imaging. The successful application of an observer response model to data linking acceptability of colour prints with the colour reproduction index is demonstrated, and a linear relation between the index and the median value of CIELAB colour difference is established for standard lighting conditions common to both image acquisition and viewing stages. This defines the quartile values of acceptability in terms of the index scale. A camera rendering index, based on the concepts of the CIE colour rendering index, is also shown to give values that are linearly related to the median value of CIELAB colour difference, again under identical illumination conditions.