Basics on Color Measurement
People who believe that the eye is the most important observer of color, argue that
judgments of color can be made purely by reference to color cards by visual matching.
The clear criticism of this technique of judging color is that everyone's perception
of color differs.
Besides genetic abnormalities, color vision changes with age due to the build up
of yellow macular pigmentation in the eye. For this reason, it is argued that all
judgments of color must be based on physical measurements. However, these measurements
and their interpretation must be related closely to the responses of visual observers.
Therefore, color control is split into two segments: visual and instrumental.
In the following pages, color measurement methods will be described: