Method, apparatus and program product for searching knots in wood

Abstract

The photographing means of the present apparatus photographs a piece of wood, while the image processing means calculates degrees of circularity from the photographed images of the piece of wood, and detects images with significant degrees of circularity as knots. In addition, the image processing means 1 clips a portion including a knot from the photographed image of the piece of wood, deems a portion clipped at a predetermined threshold among the color spaces of each pixel of the clipped portions to be a blackened portion, and determines black portions with a high proportion of a number of pixels of the blackened portion to the number of pixels of the clipped portion of the knot as dead knots.

Description

technical field [0001] The present invention relates to a method, device and program for detecting knots in wood materials such as veneers or boards sawn out of wood logs or the like. For example, in the manufacture of laminated boards, logs are cut with a knife to continuously obtain veneers with a thickness of several millimeters. After the veneers are made into a desired size and dried, the plurality of veneers are bonded together with an adhesive. In these manufacturing processes, it is necessary to select according to the position, number, area, etc. 5 to 7 stages of selection) When making laminates, the boards that constitute the surface layer (boards that are aesthetically pleasing and have few defects) and the boards that constitute the inner layer of the laminate (even if there are many defects, it is not a problem). Background technique [0002] At present, when sorting the boards that make up the surface layer and the boards that make up the inner layer of the la...

AI Technical Summary

Problems solved by technology

[0006] In the judgment with the naked eye, there are problems such as unevenness caused by different people's judgment (inaccurate), and the speed of the conveyor belt cannot be fast (poor productivity), etc.

[0007] In addition, the method of judging defects using a one-dimensional television camera has the problem of not being able to accurately detect the shape of knots, defects, etc.

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