应用可见反射光谱法对中医舌诊舌色的色度学研究

目的:应用可见反射光谱法采集舌尖舌色的数据资料,探讨舌色光谱资料进行色度参数的计算与颜色空间的表述作用。方法:实验中应用可见反射光谱法采集了120例研究对象的舌色资料,进行X、Y、Z的颜色匹配三刺激值的计算,将舌色反演于CIE 1931色品坐标,同时将三刺激值换算为RGB颜色空间模式进行舌色的表示。结果:可见反射光谱数据反演于CIE 1931色度图,有利于形象地比较不同研究对象舌色之间的差异性;通过三刺激值换算后,可以以RGB颜色空间模式进行舌色的表达;同时还发现,相同的舌色存在异谱现象。结论:应用可见反射光谱法采集的舌色资料可以进行色度学参数的计算和颜色空间的转换,反演性与重复性强,有助于研究同色异谱现象,为中医舌色的定量度量提供有益的参考。

Colorimetric Study on Tongue Color in Chinese Medicine Tongue Inspection by Visible Reflection Spectrum

In this study, a visible reflection spectrum system was used to collect data of tongue tip color. The calculation of chromaticity coordinate parameters and translation to RGB color space of tongue tip color data were also carried out. The CIE 1931 XYZ tristimulus values of tongue tip color from 120 subjects were calculated on the basis of visible reflection spectrum. And the CIE xy chromaticity diagram distribution of tongue tip color among 120 subjects was also obtained. Meanwhile, the RGB color space parameters of the tongue tip color among 120 subjects were translated by the XYZ tristimulus values. The results showed that differences of tongue tip color among different samples can be observed obviously while the optical data on color of tongue tips was cited in CIE 1931 chromaticity diagram. The CIE 1931 XYZ tristimulus values can be translated into RGB color space parameters of the tongue tip color among 120 subjects. Furthermore, there was the phenomenon of different optical spectrum for the same color in the tongue inspection. It was concluded that based on the collection of the information data of tongue tip color with visible spectrum from 380 nm to 780 nm, the calculation of chromaticity coordinate parameters and translation to RGB color space of tongue tip color data can be feasible in a high refutation and reproducibility.It provided a useful assistance for investigating the phenomenon of different optical spectrum for the same color in the tongue inspection of traditional Chinese medicine.