Pine and spruce roundwood species classification using multivariate image analysis on bark
-
David Nilsson
and Ulf Edlund
Abstract
Wood discs from 67 pine and 79 spruce logs were collected from a forest clearing. Three different 24-bit red-green-blue (RGB) images were acquired from the radial surface of each disc. The first image contained bark, the second image was a mixture of bark and wood surface, and the third image consisted only of wood surface. The image texture was compressed into vectors of Fourier-transformed wavelet coefficients. These were assembled in matrices and analysed by principal component analysis (PCA) and partial least-squares projections to latent structures (PLS). Classification using Fourier-transformed wavelet scales showed that the wood species could be predicted with 90% accuracy. A thorough examination of this classification showed that the predicting power of these models was mostly due to wavelet scales that represented the mean value of each colour channel. The prediction accuracy that could be obtained from coefficients representing image texture was generally low. The use of grey-level co-occurrence matrices prior to the wavelet transformation showed, however, that it is possible to classify the wood species of pine and spruce with an accuracy approaching 100%.
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©2005 by Walter de Gruyter Berlin New York
Articles in the same Issue
- Contents
- Species index (scientific names)
- Subject Index
- Acknowledgement
- Author Index
- Ultrastructural changes in a holocellulose pulp revealed by enzymes, thermoporosimetry and atomic force microscopy
- Development of wet strength additives from wheat gluten
- Characterization of electrolyzed magnesium spent-sulfite liquor
- Molecular weight-functional group relations in softwood residual kraft lignins
- Structure-activity relationships of cadinane-type sesquiterpene derivatives against wood-decay fungi
- Effect of water on wood liquefaction and the properties of phenolated wood
- Effect of wood species and molecular weight of phenolic resins on curing behavior and bonding development
- Contact-free measurement and non-linear finite element analyses of strain distribution along wood adhesive bonds
- Comparison between HT-dried and LT-dried spruce timber in terms of shape and dimensional stability
- Physical properties of earlywood and latewood of Pinus radiata D. Don: Anisotropic shrinkage, equilibrium moisture content and fibre saturation point
- Effect of stress levels on compressive low-cycle fatigue behaviour of softwood
- Comparison of morphological and chemical properties between juvenile wood and compression wood of loblolly pine
- Ultrastructure of commercial recycled pulp fibers for the production of packaging paper
- Oxalate regulation by two brown rot fungi decaying oxalate-amended and non-amended wood
- Pine and spruce roundwood species classification using multivariate image analysis on bark
- Detection and species discrimination using rDNA T-RFLP for identification of wood decay fungi
- Personalia
- Award presentation on the occasion of the 13th International Symposium on Wood, Fibre and Pulping Chemistry, May 16–19, 2005, Auckland, New Zealand
- NMR studies on Fraser fir Abies fraseri (Pursh) Poir. Lignins
Articles in the same Issue
- Contents
- Species index (scientific names)
- Subject Index
- Acknowledgement
- Author Index
- Ultrastructural changes in a holocellulose pulp revealed by enzymes, thermoporosimetry and atomic force microscopy
- Development of wet strength additives from wheat gluten
- Characterization of electrolyzed magnesium spent-sulfite liquor
- Molecular weight-functional group relations in softwood residual kraft lignins
- Structure-activity relationships of cadinane-type sesquiterpene derivatives against wood-decay fungi
- Effect of water on wood liquefaction and the properties of phenolated wood
- Effect of wood species and molecular weight of phenolic resins on curing behavior and bonding development
- Contact-free measurement and non-linear finite element analyses of strain distribution along wood adhesive bonds
- Comparison between HT-dried and LT-dried spruce timber in terms of shape and dimensional stability
- Physical properties of earlywood and latewood of Pinus radiata D. Don: Anisotropic shrinkage, equilibrium moisture content and fibre saturation point
- Effect of stress levels on compressive low-cycle fatigue behaviour of softwood
- Comparison of morphological and chemical properties between juvenile wood and compression wood of loblolly pine
- Ultrastructure of commercial recycled pulp fibers for the production of packaging paper
- Oxalate regulation by two brown rot fungi decaying oxalate-amended and non-amended wood
- Pine and spruce roundwood species classification using multivariate image analysis on bark
- Detection and species discrimination using rDNA T-RFLP for identification of wood decay fungi
- Personalia
- Award presentation on the occasion of the 13th International Symposium on Wood, Fibre and Pulping Chemistry, May 16–19, 2005, Auckland, New Zealand
- NMR studies on Fraser fir Abies fraseri (Pursh) Poir. Lignins