live knot

intergrown knot, live knot

A knot whose growth rings are intergrown with the surrounding wood.
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The best results were obtained for the pocket, pith, dead knot, live knot, and hole categories, which presented a TP rate higher than 95 percent, an FP rate lower than 5 percent, and an ARR higher than 95 percent.
The FMMIS method was applied to a set of 900 images of radiata pine boards, which included samples from the following 10 categories of defects: birdseye and freckle, bark and pitch pockets, wane, splits, blue stain, stain, pith, dead knots, live knots, and holes.
Each image was manually labeled according to its largest defect, into one of the following 10 defect categories: birdseye and freckle, bark and pitch pockets, wane, splits, stain, blue stain, pith, dead knots, live knots, and holes.
The following 10 defect categories were considered, plus clear wood: birds eye & freckle, bark & pitch pockets, wane, split, blue stain, stain, pith, dead knot, live knot, and hole.
Each board face was manually labeled, according to its largest defect, into one of the following 10 categories: birds eye & freckle, bark & pitch pockets, wane, split, blue stain, stain, pith, dead knot, live knot, and hole (Fig.
The reduced database contained 1,400 samples of the categories birds eye & freckle, wane, split, blue stain, pith, dead knot, live knot and hole; but for classification purposes dead knots and live knots were merged into one category: knots.
Live knots are continuous with the wood surface and don't really affect the strength of the timber and add a bit of character to the timber.
4 cm) containing live knots larger than 2 inches (50.
clear wood > live knots > tight dead knots > loose black knots or knot holes) (Barbour et al.
This in turn creates a smaller knot cross section when crosscut, and together with the more lenient requirements for live knots, produces higher grades.
A study of the live knots of pine showed that the density of knot wood was considerably higher than that of clear wood.