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Fig. 9 | Plant Methods

Fig. 9

From: Applying spectral fractal dimension index to predict the SPAD value of rice leaves under bacterial blight disease stress

Fig. 9

Contour maps of the coefficients of determination for the relationship between hyperspectral bands and SPAD values under six disease levels. In the color bar, the color changed with the correlation, from 0 to 1, meaning the stronger the positive correlation between the SPAD value and the spectral band. And from 0 to − 1, meaning the stronger the negative correlation between the SPAD value and the spectral band

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