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Method, apparatus and program product for searching knots in wood

A technology for knots and wood, which is applied in the field of knot detection, devices and procedures of wood, and can solve problems such as defects, inability to accurately detect knot shapes, and inaccuracy.

Active Publication Date: 2008-05-14
MEINAN MASCH WORKS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Method, apparatus and program product for searching knots in wood
  • Method, apparatus and program product for searching knots in wood
  • Method, apparatus and program product for searching knots in wood

Examples

Experimental program
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Embodiment Construction

[0044] (1) Description of thin plate sorting device

[0045] FIG. 1 is an explanatory diagram of a thin board sorting device. In Fig. 1, the overall structure of the veneer sorting device is shown. The veneer sorting device is provided with an image processing device 1, a picker control device 2, an operation panel 3, a belt conveyor 4, LED lighting for transmitted light 5, a reflector LED lighting for light 6, level distribution device 7, line sensor camera 8, sheet 9.

[0046] The image processing device 1 is an image processing unit that processes image data from the line sensor camera 8 and outputs processing results such as sheet quality grades to the picker control device 2 . The picker control device 2 is a device that outputs a picker conveyor control signal such as operation and stop of the conveyor, and a control signal of the rank distribution device 7 based on the output of the image processing device 1 . The operation panel 3 is an operation panel for performing...

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PUM

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Abstract

The ivention provides a wood knot and a dead knot with bark which can be infallibly detected. A piece of wood is imaged by imaging means (8). An image processing means (1) calculates the circularity of a portion of the captured image and judges the portion having a high calculated circularity as a knot. The knot portion is cut off from the wood image captured by the image processing means (1), parts cut off from the color space of the pixels of the knot portion with a predetermined threshold are judged as blackened parts, and the knot portion having a high ratio of the number of pixels of the blackened parts to the number of pixels of the knot portion is judged as a dead knot.

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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/46G01N21/892G01B11/08G06T1/00G06V10/44
CPCB07C5/14G06T2207/30161G01N21/8986G06T7/604G06K9/4604G01N33/46B07C5/3422G06T7/0004G06T7/64G06V10/44G01B11/08G01N21/892G06T1/00
Inventor 平冈纪之
Owner MEINAN MASCH WORKS INC