Methods for detecting compression wood in lumber

Details Methods for detecting compression wood in lumber Methods for detecting compression wood in lumber

2007-12-04

2007-12-04

Evans, F. L. (Department: 2877)

Optics: measuring and testing

By shade or color

Tristimulus examination

C356S406000, C356S237100

Reexamination Certificate

active

11535785

ABSTRACT:
Methods are provided for detecting compression wood, blue stain, or pitch in lumber. A light beam is projected towards the wood sample. Line or area cameras acquire images of light that is reflected from the wood sample. Based on the intensity of the reflected light at one or more locations on the wood sample, compression wood, blue stain, or pitch may be detected.

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patent: 2006/0056659 (2006-03-01), Laurent et al.
Bond, B.H., Kline, D.E., Araman, P.A., “Characterization of Defects in Lumber Using Color, Shape, and Density Information”, 1998, Proc. International Conference on Multisource-Multisensor Information Fusion, vol. 2, p. 581-587.
Adel, M., Wolf, D., Vogrig, R., Husson, R., “Evaluation of Colour Spaces in Computer Vision Application of Wood Defects Detection”, 1993, International Conference on Systems, Man and Cybernetics, vol. 2, p. 499-504.

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