HIGH SPEED AND RELIABLE DETERMINATION OF LUMBER QUALITY USING GRAIN INFLUENCED DISTORTION EFFECTS

摘要

Disclosed is a high speed electro-optical sensor system to determine qualityofobjects, such as lumber, having complex structures such as grain, knots andthe like. Itis particularly concerned with electro-optical sensors useful for thispurpose, forexample those employing the tracheid or other grain induced distortioneffects, or thosebased on visually discernable defects due to contrast variation. Preferredversions usecomputer processed data from TV cameras viewing laser spot illumination ofboards.