Research on Discrimination of Cabbage and Weeds Based on Visible and Near-Infrared Spectrum Analysis
ZU Qin1, 2, 3, ZHAO Chun-jiang1, 3, DENG Wei1, 3*, WANG Xiu1, 3
1. Beijing Research Center for Information Technology in Agriculture, Beijing 100097, China 2. The Electrical Engineering College of Guizhou University, Guiyang 550025, China 3. Beijing Research Center of Intelligent Equipment for Agriculture, Beijing 100097, China
Abstract：The automatic identification of weeds forms the basis for precision spraying of crops infest. The canopy spectral reflectance within the 350~2 500 nm band of two strains of cabbages and five kinds of weeds such as barnyard grass, setaria, crabgrass, goosegrass and pigweed was acquired by ASD spectrometer. According to the spectral curve characteristics, the data in different bands were compressed with different levels to improve the operation efficiency. Firstly, the spectrum was denoised in accordance with the different order of multiple scattering correction (MSC) method and Savitzky-Golay(SG)convolution smoothing method set by different parameters, then the model was built by combining the principal component analysis (PCA) method to extract principal components, finally all kinds of plants were classified by using the soft independent modeling of class analogy (SIMCA) taxonomy and the classification results were compared. The tests results indicate that after the pretreatment of the spectral data with the method of the combination of MSC and SG set with 3rd order, 5th degree polynomial, 21 smoothing points, and the top 10 principal components extraction using PCA as a classification model input variable, 100% correct classification rate was achieved, and it is able to identify cabbage and several kinds of common weeds quickly and nondestructively.
Key words：Weeds discrimination;Visible and near-infrared;Principal component analysis;Multiple scattering correction
祖 琴1, 2, 3, 赵春江1, 3，邓 巍1, 3*，王 秀1, 3 . 基于可见-近红外光谱分析的圆白菜与杂草识别研究 [J]. 光谱学与光谱分析, 2013, 33(05): 1202-1205.
ZU Qin1, 2, 3, ZHAO Chun-jiang1, 3, DENG Wei1, 3*, WANG Xiu1, 3 . Research on Discrimination of Cabbage and Weeds Based on Visible and Near-Infrared Spectrum Analysis . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2013, 33(05): 1202-1205.
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