As shown in Figure 5 , the values of these indices all exhibited an increasing trend with the deterioration of infestation severity. 3.2 Feature selection results A total of 632 dual-temporal spectral difference-based candidates were constructed (DSRIs: 304, DSDIs: 304, DSDI-SLs: 24).
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A novel method for detecting brown planthopper (<i>Nilaparvata lugens</i> Stål) early infestation using dual-temporal hyperspectral images.
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