中医舌诊中舌色的色度学特征研究

【目的】运用色度学的方法对各类舌色的量化特征进行了研究，以期为舌色判断的客观化提供依据。【方法】对207幅各类舌色图谱扫描后，分析取样点R(红)、G(绿)、B(蓝)各分量值与其总和的比值。同时对青紫类舌色的以上述指标进行聚类后，再与其他常见舌色进行组间比较。【结果】淡白舌G比最高，R比和B比居中；红色类舌R比最高，G比和B比较低；青紫类舌B比最高，G比居中，R比最低。淡白舌NR NG NB最大，红色类舌最小，青紫类舌居中。【结论】不同中医专著中的舌色图谱呈现一定的色度学规律，但其参数的使用宜结合临床实际。

Research of Colorimetrical Characteristics of Tongue Color in Tongue Examination

Objective]Quantitative characteristics of tongue color is investigated by colorimetrical method to supply evidence for the objectivity of tongue inspection. Methods] Two hundred and seven tongue pictures with different tongue color were scanned. The values of R (red) , G (green) and B (blue) of different sampling spots in the pictures, as well as their ratios with the total value of R + G + B were observed. Purple-bluish tongue was clustered with the above indexes and then was compared with other common-colored tongue color. Results] In light white tongue, G ratio was high, R ratio and B ratio low; in red tongue, R ratio was high, G ratio and B ratio low; in purple-bluish tongue, B ratio was higher, G ratio high and R ratio low. The total value of R + G + B was higher in light white tongue, high in purple-bluish tongue and low in red tongue. Conclusion] There are colorimetrical characteristics in tongue pictures from different monographs of traditional Chinese medicine, but the colorimetric parameters of the tongue pictures should be applied according to clinical cases.