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Official Journal of the Japan Wood Research Society

Journal of Wood Science Cover Image
Fig. 4 | Journal of Wood Science

Fig. 4

From: Determination of physical and chemical properties and degradation of archeological Japanese cypress wood from the Tohyamago area using near-infrared spectroscopy

Fig. 4

NIR predicted (solid line with closed circle) and measured (dashed line with open circle) wood properties as a function of the dendrochronological age. Spectral pretreatment, wavenumber used for regression, R2, RMSECV, RPD, regression line bias, and optimum number of PLS components yielding the best R2 are shown on the right side of each figure. MM: min–max normalization, FD: first derivative, MSC: multiplicative scattering correction, and SNV: standard normal variate

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