[Quantitative analysis of 200 human tongue pictures]

Photoelectricity integration was applied to detect and analyse the colorimetric tongue pictures in 200 human beings. The results showed that among various tongue pictures there were evident differences in colorimetric features. This method could also assess the thickness of tongue coating, thus obtaining the colorimetric features including color of tongue proper, color of coating as well as thickness index in common tongue pictures. Therefore it might provide scientific basis for objective and quantitative assessment of tongue pictures in TCM.