Title :
Determination of wood moisture content using angularly, spatially and spectrally resolved reflectance
Author :
Törmänen, Veli-Matti O. ; Mäkynen, Anssi J.
Author_Institution :
Meas. & Sensory Lab., Univ. of Oulu, Kajaani, Finland
Abstract :
The feasibility of measuring the moisture content of thin wood material by analyzing the spectral, angular and spatial distribution of the light backscattered from a wood surface is investigated. The measurements were conducted with 44 1.5 mm thick fresh veneer samples. Spectra of the samples were measured from 12 different angles within the wavelength range of 500-950 nm throughout their drying process. PLS models were constructed to find correlations between measured data and the moisture content of the samples. Squared correlation coefficient (R2) of 0.891 and Root-Mean-Square Error of Prediction (RMSEP) of 5.43 between real moisture percentages and those predicted with PLS models were achieved.
Keywords :
correlation methods; drying; infrared spectra; light scattering; mean square error methods; moisture measurement; spectral analysis; wood; PLS models; angular analysis; backscattered light; correlation coefficient; drying process; moisture content measurement; root mean square error; spatial analysis; spectral analysis; thin wood material; veneer; wavelength 500 nm to 950 nm; Data models; Moisture; Moisture measurement; Predictive models; Reflectivity; Spectroscopy; Wavelength measurement; PLS; moisture; multiangular; multivariate; spectral; veneer; wood;
Conference_Titel :
Instrumentation and Measurement Technology Conference (I2MTC), 2011 IEEE
Conference_Location :
Binjiang
Print_ISBN :
978-1-4244-7933-7
DOI :
10.1109/IMTC.2011.5944140
