Food colour appearance judged using images on a computer display

摘要

Pixel-based images of food products are prepared and systematically perturbed in colour and lightness, and the changes quantified. Observations are reported in terms of CIELAB and pixel value, with colour differences corresponding to acceptability and perceptibility thresh- olds for each subject and each perturbation applied. Conclusions are drawn concerning the usefulness of digital imagery for product panel assessment, the relative importance of colour and lightness variations of the food products investigated and the applicability of a mathematical function to the results of the visual assessments carried out. The relationship of acceptability to imperceptibility of image perturbations is quantified.