CIE x030:2006

CIE Division 1 and ISCC jointly organized a symposium to celebrate the 75th anniversary ofthe CIE 1931 Standard Colorimetric Observer, to discuss the many advances that have beenmade since its introduction, to understand the current state of colorimetry and colourappearance, and to provide guidance on directions for future work.

The meeting was divided into seven main sessions:

• Standard Observer
• Colour Matching Functions
• Instruments and Standards
• Temporal and Spatial Issues
• Application of the Standard Observer
• Colour Appearance
• Colour Differences
• Colour Management
• Discussion

A general theme throughout the discussion, that summarized the hot topics of thesymposium, was the need for more comprehensive colour appearance and colour differencemodels. The current models take into account only a relatively small number of factors thatcan affect the appearance of objects and images. It was recommended that models bedeveloped that include the effect of spatial and temporal factors, that are applicable to alllevels of illumination from photopic to scotopic, and that take into account both normalvariations in visual functions and changes in visual functions with aging.

A second theme was the assessment of visual appearance and visual differences, or more specifically, themeasurement of other attributes of surfaces such as gloss, translucency and texture.