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Method and device for detecting defects of ceramic tiles based on machine vision

A technology of machine vision and defect detection, which is applied in the direction of measuring devices, ceramic material production, and optical testing for flaws/defects. It can solve the problems of high missed detection rate, missing four corners of ceramic tiles, and high labor intensity, etc. Good rate of pass, good classification effect, and the effect of improving production efficiency

Active Publication Date: 2022-06-03
CHINA THREE GORGES UNIV
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Problems solved by technology

[0008] 5) The missing corner refers to the situation where the four corners of the ceramic tile are missing
However, manual detection is labor-intensive, with high missed detection rate, slow detection speed, and detection results are easily affected by subjective factors.
In addition, the ceramic industry generally has the problem of difficult and expensive recruitment

Method used

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  • Method and device for detecting defects of ceramic tiles based on machine vision
  • Method and device for detecting defects of ceramic tiles based on machine vision
  • Method and device for detecting defects of ceramic tiles based on machine vision

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Embodiment Construction

[0095] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principle of the present invention, and are not intended to limit the protection scope of the present invention.

[0096] Figure 1(a)-Figure 1(f) Here are the top-view images of ceramic tiles in the embodiment of the present invention, as well as example images of typical defects and rejects; among them, Fig. 1(a) is a normal ceramic tile; Fig. 1(b) is a waste product with cracks; Fig. 1(c) is a Bulge waste; Figure 1(d) is a waste with missing glaze; Figure 1(e) is a waste with color difference; Figure 1(f) is a waste with missing corners.

[0097] It is worth pointing out that although ceramic tiles of different colors have their own defect types and judgment criteria, most of them follow the principle of the present invention in image acquisiti...

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Abstract

A machine vision-based ceramic tile defect detection method and device relate to the field of ceramic tile defect detection and aim at improving the efficiency of ceramic tile defect detection. The present invention first obtains the front view image of the ceramic tile; then performs image segmentation on the image to extract the ceramic tile from the background of the conveyor belt; Compare the characteristic parameters to determine whether the ceramic tiles to be inspected have defects such as missing corners, cracks, bulges, color differences, lack of glaze, etc., and then classify the ceramic tiles to be inspected to distinguish waste products from qualified products. Compared with the traditional manual detection, the present invention can efficiently detect all the ceramic tiles one by one, greatly improves the production efficiency, and remarkably improves the pass rate of the ceramic tiles in the factory.

Description

technical field [0001] The invention relates to the field of ceramic defect detection, in particular to a method and device for defect detection of ceramic tiles based on machine vision. Background technique [0002] A ceramic tile belongs to a roof building material. It has a rectangular tile body. The front side of the tile body is provided with a longitudinal groove, the tile body at the upper end of the groove is provided with a hanging tile stopper, and the left and right sides of the tile body are respectively a left lap edge and a right lap edge. There is a rear claw boss at the lower end of the back of the tile body, and a protruding rear rib is arranged on the convex part of the back of the tile body. The ceramic tile has a reasonable structure, smooth drainage, and no water leakage. During installation, the ceramic tiles can be combined with each other, and the convenience is high, the combination is tight, and the connection is firm. The tile body can be made ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/88G01N21/84
CPCG01N21/8806G01N21/8851G01N21/84G01N2021/8874G01N2021/8887G01N2021/845Y02P40/60
Inventor 曾曙光肖焱山郑胜李强张邵伟李小磊
Owner CHINA THREE GORGES UNIV
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