Abstract
The relationships between an overall Colour Reproduction Index (CRI), a mean colour difference, CIELAB ΔE ab * , and the acceptability of colour prints are investigated and quantified for two scenes at a range of controlled hue and lightness excursions from standard print criteria. This paper extends the analysis of experimental results to show linear relationships between CRI and CIELAB ΔE ab *, and between each of these measures and the acceptability of reproductions. The relationships are, however, both complex and noisy. Print lightness is shown to be a more significant quality parameter than is allowed for in the calculation of the overall CRI and CIELAB ΔE ab *. It is also shown that hue is a scene-specific determinant of print acceptability. Conclusions are drawn concerning the relative usefulness of the two different measures of colour difference : CRI and CIELAB ΔE ab *.
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