Production method of orientation measurement method and wood-based composite material of wood-based raw material pieces

摘要

PROBLEM TO BE SOLVED: To provide an orientation measuring method for measuring simultaneously both the external dimension and an orientation angle of the long axis of a plurality of liqneous-based material piece on the liqneous-based laminate mat surface or on the liqneous-based composite material surface.;SOLUTION: An image of the liqneous-based material piece laminated by adhesion of a bonding agent is imaged, and only a plurality of pixels wherein some value of specific parameters (lightness, hue or chroma) is in the range of prescribed values are selected relative to each pixel in the imaged image. The parameter values of the plurality of selected pixels are changed into values apparently different from an unselected pixel, to thereby constitute a different image from the plurality of selected pixels. The area of the image is compared with the area of an oblong graphic model. The long axis length of the oblong graphic model, the short axis length, and the tilt angle from a reference line of the long axis when the area ratio becomes maximum, are measured, to thereby determine the dimension of the liqneous-based material piece in the liqneous-based material piece image, and a tilt angle distribution from the reference line.;COPYRIGHT: (C)2004,JPO