Color specification for color rendering

The present work was carried out as part of the CLEAR project, which aims to create a virtual diagnostic laboratory for polychrome artifacts through the definition of an image acquisition and processing protocol with high resolution and accuracy in terms of colour rendering. To achieve this goal, contact spectrophotometric and distance spectroradiometric measurements for colour specification will be performed. All data will be used for the processing, training, and validation of a predictive model for the evaluation of colour differences and for the creation of a two-way correspondence between RGB colour values and coordinates expressed in the CIELAB colour space. On this occasion, the results obtained on a first series of laboratory specimens consisting of monochrome cubes to highlight the influence of the contact and distance measurements on the calculation of the RGB triplet are discussed.