Methods for detecting blue stain in lumber

Details Methods for detecting blue stain in lumber Methods for detecting blue stain in lumber

G - Physics

01

N

G01N 21/25 (2006.01) G01N 21/898 (2006.01)

Patent

CA 2601490

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.

L'invention porte sur des méthodes permettant de détecter le bois de compression, le bleuissement ou la poix végétale dans le bois d'oeuvre. Un faisceau de lumière est projeté vers l'échantillon de bois. Des caméras linéaires ou thermique acquièrent des images de la lumière qui est réfléchie de l'échantillon de bois. Selon l'intensité de la lumière réfléchie à un ou plusieurs emplacements sur l'échantillon de bois, le bois de compression, le bleuissement ou la poix végétale peuvent être détectés.

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