The Potential of Vis- and Nir-Spectroscopy for the Nondestructive Evaluation of Grain-Angle in Wood

Authors

  • Wolfgang Gindl
  • Alfred Teischinger

Keywords:

Grain angle, near infrared light, partial least squares regression, spectroscopy, visible light

Abstract

Grain angle is of major importance for load-bearing applications of wood because it exerts a strong influence on strength and elasticity. This study proposes PLS (partial least squares) analysis of Vis and NIR reflectance spectra as a possible means for a rapid and nondestructive determination of grain angle. With a root mean square error of 6°, and a coefficient of determination of 0.77 (Vis) and 0.80 (NIR), both spectral ranges proved suitable for the measurement of grain angles up to 40°.

References

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Published

2007-06-05

Issue

Number 4 / October 2002

Section

Research Contributions

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