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基于试验箱冬小麦冻害盆栽试验,得到了识别和评价冻害差异程度的高光谱敏感波段和指数,获得了冻害农学指标;研究了河南省林州市东南部及周边地区2012-2013年的冻害过程,以冻害发生前后的两幅高光谱影像为研究对象,利用冬小麦冻害高光谱敏感指数的研究结果,结合大田试验对农学冻害指标进行尺度转换,获得了HSI遥感冬小麦冻害指标,进行了冬小麦冻害的高光谱遥感监测。结果显示,VI_3[VI_3=(SDr-SDb)/(SDr+SDb)]高光谱指数冻害遥感监测结果更精确。研究表明利用HJ-1A星HSI数据进行冬小麦冻害监测是可行的,可为HJ-1A星高光谱数据在农业遥感监测中的应用提供参考。
Based on the experiment of winter wheat fry pot experiment in the experimental chamber, hyperspectral sensitive bands and indices for identifying and evaluating the degree of frost damage were obtained, and agricultural indicators of frost damage were obtained. The frost damage process in the southeastern and urban areas of Linzhou City in Henan Province from 2012 to 2013 was studied, Two hyperspectral images before and after freezing damage were taken as research objects. Based on the research results of hyperspectral sensitive index of winter wheat frost damage and scale conversion of agricultural frost damage indicators in field trials, the HSI remote sensing winter wheat frost damage index was obtained and the winter wheat frost damage was high Spectral remote sensing monitoring. The results show that VI_3 [VI_3 = (SDr-SDb) / (SDr + SDb)] hyperspectral index frost damage remote sensing monitoring results more accurately. The research shows that the HJ-1A satellite HSI data is feasible to monitor frost damage of winter wheat and it may provide a reference for the application of HJ-1A satellite hyperspectral data in agricultural remote sensing monitoring.