1. 天津大学，精密测试技术及仪器国家重点实验室，天津 300072 2. 天津中医药大学, 中医药工程学院, 天津 300193 3. 天津师范大学，物理与电子信息学院，天津 300387 4. Computer Science and Engineering Department, the University of Texas, Arlington 76019,America
Improving Signal to Noise Ratio of Spectroscopy for Tongue Inspection by Reflectivity Normalization Method
ZHAO Jing1, 2, LI Zhe1, LI Gang1, LIN Ling1, Jean X. Gao3, 4, HAN Guang-lin3*
1. State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin 300072, China 2. Institute of Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China 3. College of Physics & Electronic Information, Tianjin Normal University, Tianjin 300387, China 4. Computer Science and Engineering Department, the University of Texas, Arlington 76019, America
Abstract：In order to solve the problem that the collected spectrum was influenced seriously by the operation method, improve the instrument sensitivity and enhance the differences between samples, reflectivity normalization method was used for data preprocessing in the present article. First, the reflect spectrum of tongue was collected, then the reflectivity and the normalized reflectivity of the samples were compared, and it was found that reflectivity normalization method can eliminate the impact brought by the collection from different distance. At the same time, the classification results between the reflectivity and the normalization reflectivity of the different samples were compared, and the results showed that the reflectivity normalization method can enhance differences between the samples and enhance model’s robustness and prediction ability of subsequent disease screening.
Key words：Normalized reflectivity;Spectroscopy;Tongue inspection;Data preprocessing;Signal to noise ratio
赵 静1, 2, 李 哲1, 李 刚1, 林 凌1, Jean X.Gao3, 4, 韩广琳3* . 反射率归一化用于提高光谱法舌诊信噪比 [J]. 光谱学与光谱分析, 2012, 32(06): 1624-1627.
ZHAO Jing1, 2, LI Zhe1, LI Gang1, LIN Ling1, Jean X. Gao3, 4, HAN Guang-lin3* . Improving Signal to Noise Ratio of Spectroscopy for Tongue Inspection by Reflectivity Normalization Method . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2012, 32(06): 1624-1627.
