Absolute and Relative Colorimetric Evaluation for Precise Color On Screen

摘要

This paper deals with assessing and controlling the variables required to present accurate and precise color on screen. The objective is to generate a representation of an accurate, precise, soft copy of an object color with little difference in their color and appearance. This opens new vistas in product design and quality control. We obtained duplicate sets of 23 colors including two neutral chips that are distributed and widely spaced at different color centers throughout color space. We used these sets to evaluate color and appearance at different locations remote to one another. We obtained CIE L~* a~*b~* values for the color representations displayed on the screen under multiple illuminants, and compared those colorimetric values to the corresponding object color sample values with a Pearson Correlation coefficient greater than 0.95 for all illuminants. Multiple personnel in different locations performed psychometric evaluations of the color and appearance presented by the display to that of the perceived color and appearance of the object under multiple illuminants. We quantitatively assessed and ranked the quality of the perceived color matches. We judged the precise color on screen to be accurate using our rating system and applying business statistics to evaluate and quantify the results. The evaluation of the data validate that we achieved excellent colorimetric (measured) accuracy and quantifiable perceptual agreement of the soft copy color to the color and appearance of objects.