A method of measurement and analysis of the gingival color using a multilayer reversal color film (1)

Abstract

This paper describes a fundamental method for measuring the color of the gingiva with a multilayer color film. The Color Discrimination Index (CDI) which is defined from the photometric results using color film is introduced to express the color of the gingiva.The CDI is independently determined from the color temperature of light sources or the variations, shown both theoretically and experimentally, of exposure value for photographs.It is also shown that the CDI can be successfully applied to analyzing the gingival color with a digital image processing technique.