An image-based dimension measurement method for wood panels

A measurement method and technology for wood panels, applied in the field of image-based size measurement of wood panels, can solve the problems of slow measurement speed, affecting the automation degree of wood processing industry, and high fatigue of measurement personnel, achieving precise management, saving labor costs and time. cost, the effect of avoiding repeated measurements

Active Publication Date: 2021-01-19
北盛国基(南京)光学有限公司
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AI Technical Summary

Problems solved by technology

Due to the large flow of wood, the existing wood measurement methods have problems such as high fatigue of the surveyors, slow measurement speed, high error rate, and high cost, which seriously affect the overall improvement of the automation level of the wood processing industry.

Method used

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  • An image-based dimension measurement method for wood panels

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Embodiment Construction

[0029] The present invention will be specifically described below in conjunction with the accompanying drawings.

[0030] As shown in appendix 1, an image-based method for measuring the size of a timber board includes the following steps:

[0031] Step 1: Utilize the image acquisition device to take the image of the end of the timber pile, i.e. the timber board image I(x, y); utilize the laser rangefinder to obtain the distance D between the image acquisition device and the timber board pile; the timber piles have the same length The cuboid wood boards are stacked in the same direction to form a square cuboid in cross section; the image I(x, y) of the wood boards is a square. The specific implementation method is: select a timber measurement site without sunlight interference, place a cubic timber pile composed of multiple timber boards of uniform length separately, the head of the timber pile faces the image acquisition device, and place a green screen at the rear end of the ...

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Abstract

The invention particularly relates to an image-based wood plate dimension measuring method. The method comprises the following steps of collecting a wood board image I (x, y); carrying out target recognition processing on the I (x, y) to obtain a Mask (x, y) representing the 1-bit of the wood plate pixel; calculating the total area of the cross section of the wood plate through the wood board image I (x, y) and the wood board Mask (x, y); calculating an edge graph Edge (x, y) of the image in image I (x, y) by adopting an edge detecting algorithm; calculating an edge of each wood plate, an height and the width value Limage (h, l) of each wood plate in the I (x, y) respectively based on the edge graph Edge (x, y); obtaining an actual length W corresponding to each pixel according to the distance D of the wood plate pile to the image acquisition equipment and the FOV value of the image acquisition equipment; and obtaining a height and a length of each wood in reality by multiplying the height and the width value Limage (h, l) of each detected wood plate by the corresponding length W of each pixel respectively. According to the method, the labor cost and the time cost can be saved, andmeanwhile, the error is controlled under the unified standard.

Description

technical field [0001] The invention relates to the field of digital image processing, in particular to an image-based method for measuring the size of a wood board. Background technique [0002] In each circulation link of the wood processing industry, it is necessary to accurately measure the length, width and height of the wood boards to ensure that the quantity and quality of the delivered wood meet the requirements. A neutral and objective method of measuring wood panels not only ensures the interests of both parties, but also saves costs. With the continuous improvement of the informatization level of the wood processing industry, higher requirements are put forward for the automation of the wood processing process. [0003] At present, in the various circulation links of wood, the measurement of the length of wood boards still continues the backward manual measurement method. Due to the large flow of wood, the existing wood measurement methods have problems such as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/02G01B11/06G01B11/28
CPCG01B11/02G01B11/0608G01B11/28
Inventor 张道宋文
Owner 北盛国基(南京)光学有限公司
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