摘要
舌色是中医舌象的重要特征。然而舌象的采集、传输和显示过程,不可避免会造成颜色失真。对于中医舌象分析,颜色校正是一个必要的预处理步骤,目的在于降低或消除成像过程中对舌象颜色的影响。如何评判颜色校正后获得的舌象颜色是否真实、恒定,已成为中医舌象分析中普遍存在的突出问题。本文首先介绍了RGB、XYZ、CIEL*a*b*等颜色空间,分析了ΔEa*b色差公式的不足;然后详细论述了CIEDE2000色差公式ΔE00;最后利用舌象颜色数据对两个典型色差公式ΔEa*b、ΔE00进行色差评价。实验结果表明,ΔE00是目前和人眼视觉最相匹配的色差公式,与ΔEA*B相比,ΔE00计算结果与实际视觉感觉较为一致。本文通过应用不同色差公式进行色差评价,论证了CIEDE2000色差公式应用到中医舌象色差评价的可行性。
Tongue color is an important element in forming a meaningful tongue image. Unfortunately, color distortion is almost inevitable in the process of capturing, transferring, and displaying tongue images. In the context of traditional tongue image based diagnosis, color correction is necessary to reduce or offset unneeded effects. The key problem of having a traditional tongue image based diagnosis is to evaluate if the tongue color obtained is true to be evidences. This paper for the first time introduced color space, such as RGB,XYZ,CIEL^＊ a^＊ b^＊ , analyzed the flaws of color difference formula ΔEab^＊, and discussed the CIEDE2000 color difference formula ΔE00 in detail. Authors also used tongue color data to evaluate color differences of two typical color difference formulas. Experimental results indicated that ΔE00 is the color difference formula that presents a best match with people＇s vision at present stagey and ΔE00 is closer to the real vision feeling in every color field, compared with ΔEab^＊. This paper also evaluated different color difference formula, and discussed the feasibility of using CIEDE2000 to evaluate tongue color differences.
出处
《世界科学技术-中医药现代化》
2007年第5期111-115,121,共6页
Modernization of Traditional Chinese Medicine and Materia Medica-World Science and Technology
基金
国家自然科学基金重点项目(60431020):中医关键诊断信息获取与处理理论与技术研究
北京市自然科学基金项目(3052005):中医舌诊形态特征自动分析方法的研究
国家自然科学基金专项(60227101)
中医舌象分析仪的研制
国家自然科学基金(60301003)面诊中医诊断的舌象分析技术研究
关键词
中医舌象
ciede2000色差公式
色差评价
traditional Chinese medicine tongue image
CIEDE2000 color difference formula
color difference evaluation
