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中文摘要：
在中医舌诊客观化的研究中，舌图像颜色数据的准确记录是后续计算机分析的基础，也是舌图像资料有效保存的保证。为此，必须对采集的图像进行颜色校正，以消除光照环境和采集设备的变化对图像数据的影响。在基于光谱反射率还原的颜色校正方法中，有限维模型是光谱反射率降维的有效方法。本文从光谱反射率复原角度，对舌色范围进行了有限维模型分析，结果表明利用三个基函数表示舌色光谱反射率，其特征值能量高达99．13％，估计得到的光谱反射率曲线与测量曲线接近。分析结果将为实现舌表面光谱反射率的复原，和进一步进行颜色校正提供依据。
英文摘要：
In the characterization research of tongue diagnosis, the veracity of tongue image color data is the base of image analysis, also the request of information preservation. Therefore, the images need to be color corrected for eliminating the variety of illumination and image capturing devices. Among the color correction methods based on spectral reflectance reproduction, the finite dimension model is an effective way to condense spectral reflectance. The color of tongue is analyzed here by the finite dimension model based on spectral reflectance reproduction, and the conclusion is drawn that reflectance generated by three basis functions which is capturing 99.13% of the overall variance, provides good approximations to the spectral reflectance of tongue. The conclusion would provide support for the color correction research of tongue images based on spectral reflectance reproduction.
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