水稻叶绿素敏感波段选择方法的研究

Research of Method for Sensitive Band Range Selection of Rice Chlorophyll

利用典型相关分析方法分析了不同生育期叶绿素含量与各波段光谱特征的相关系数,结果表明,除分蘖期与叶绿素b含量相关性不显著外,各生育期在430-700 nm叶绿素含量与各波段光谱特征均达到显著相关。利用主成分分析方法对其分析的结果显示,第一主成分主要包含了510-520、520-530、530-540、540-550、550-560、570-580 nm几个可见光波段的信息,第二主成分主要包含了760-770、750-760、740-750、730-740 nm近红外波段的信息。利用典型相关分析和主成分分析对水稻叶片叶绿素进行分析得出的敏感波段范围基本一致。

In the research,the correlation coefficients of chlorophyll content in rice leaves and spectral characters at different growth stages were analyzed based on the canonical correlation analysis.The results showed that the chlorophyll content correlated significantly with the light transmittance and absorbance at 430~700 nm at all growth stages,except chlorophyll b content at tiller stage.Using the principal component analysis,the first and the second principal component were obtained,which mainly contained the information of visible light bands of 510-520,520-530,530-540,540-550,550-560,570-580 nm and the near infrared bands of 760-770,750-760,740-750 and 730-740 nm respectively.The range of sensitive bands was general consistent obtained by canonical correlation analysis method and principal component analysis method.