Diagnosis Study of Rice Leaf under Phosphorus Insufficiency Based on Spectral Features of Scan Image and Pattern Recognition
DING Xiao-dong，SHI Yuan-yuan，LU Xue，DENG Jin-song，SHEN Zhang-quan, WANG Ke*
Zhejiang Key Laboratory of Remote Sensing & Information Technique, Ministry of Education Key Laboratory of Environmental Remediation, Ecological and Health, Institute of Agricultural Remote Sensing & Information Technique, Zhejiang University, Hangzhou 310029, China
Abstract：Insufficiency of phosphorus could greatly effect rice production, thus it is significant to adopt quick and nondestructive diagnosis of phosphorus content. The present paper focused on first expanded leaves with different phosphorus fertilization levels, comprehensively extracted 26 features’ spectral information such as color, texture and shape etc. Single feature index analysis was conducted. Then features were collected to integrate CfsSubsetEval+Scattersearch method for optimizing, evaluation and choosing. Based on the feature selection for different leave positions, leaves in different phosphorus fertilization levels were finally classified into three grades (extremly insufficient, significant insufficient and normal) according to rough set theory. Results showed that the accuracy of recognition was very high while few phosphorus contained in the leaves. Moreover, the third expanded leaf is the best part for phosphorus-nutrient diagnosis.
丁晓东，石媛媛，路 雪，邓劲松，沈掌泉，王 珂* . 基于扫描图像光谱特征和模式识别的水稻叶片磷素诊断研究 [J]. 光谱学与光谱分析, 2011, 31(05): 1336-1339.
DING Xiao-dong，SHI Yuan-yuan，LU Xue，DENG Jin-song，SHEN Zhang-quan, WANG Ke* . Diagnosis Study of Rice Leaf under Phosphorus Insufficiency Based on Spectral Features of Scan Image and Pattern Recognition . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2011, 31(05): 1336-1339.
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