Study on the Detection of Gray Mold of Tomato Leave Based on Vis-Near Infrared Spectra
WU Di1,FENG Lei1,ZHANG Chuan-qing2,HE Yong1*
1. College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310029, China 2. College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310029, China
Abstract：Visible and near-infrared reflectance spectroscopy (Vis/NIRS) technique was applied to the detection of disease level of grey mold on tomato leave. Chemometrics was used to build the relationship between the reflectance spectra and disease level. In order to decrease the amount of calculation and improve the accuracy of the model, principal component analysis (PCA) was executed to reduce numerous wavebands into several principal components (PCs) as input variables of BP neural network. The loading value of PC1 was applied to qualitatively analyze which wavebands were more important for disease detection. Prediction results showed that when the number of primary PCs was 8 and the hidden nodes of BP neural network were 11, the detection performance of the model was good as correlation coefficient (r) was 0.930 while standard error of prediction (SEP) was 0.068 7. Thus, it is concluded that spectroscopy technology is an available technique for the detection of disease level of grey mold on tomato leave based on chemometrics used for data analysis.
吴迪1,冯雷1,张传清2,何勇1*. 基于可见/近红外光谱技术的番茄叶片灰霉病检测研究[J]. 光谱学与光谱分析, 2007, 27(11): 2208-2211.
WU Di1,FENG Lei1,ZHANG Chuan-qing2,HE Yong1*. Study on the Detection of Gray Mold of Tomato Leave Based on Vis-Near Infrared Spectra. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(11): 2208-2211.
[1] Putnam M L. Crop Protection, 1995, 14(6): 517. [2] Fox R T. Agriculture Ecosystems and Environment, 1997, 64: 125. [3] Antihus H G, He Yong, Annia G P. Journal of Food Engineering, 2006, 77(2): 313. [4] TANG Yan-feng, ZHANG Zhuo-yong, FAN Guo-qiang(汤彦丰，张卓勇，范国强). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2005, 25(4): 521. [5] LIU Shu-hua, ZHANG Xue-gong, ZHOU Qun, et al(刘沭华，张学工，周 群, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2005, 25(6): 878. [6] He Yong, Feng Shuijuan, Deng Xunfei, et al. Food Research International, 2006, 39(6): 645. [7] Kokaly R F, Clark R N. Remote Sensing of Environment, 1999, 67: 267. [8] Rencet A N, Nemeth J. Journal of Remote Sensing, 1985, 11(1): 50. [9] Bravo C, Moshou D. Biosystems Engineering, 2003, 84(2): 137. [10] Muir Y, Porteous R L, Wastie R L. Journal of Agricultural Engineering Research, 1982, 27(2): 131. [11] HUANG Mu-yi, WANG Ji-hua, HUANG Wen-jiang, et al(黄木易, 王纪华, 黄文江, 等). Transactions of the Chinese Society of Agrcultural Engineering(农业工程学报), 2003, 19(6): 154. [12] WU Shu-wen, WANG Ren-chao, CHEN Xiao-bin, et al(吴曙雯, 王人潮, 陈晓斌, 等). Journal of Shanghai Jiaotong University (Agricultural Science)(上海交通大学学报·农业科学版), 2002, 20(1): 73.
