Ceramic product surface spot detection method and equipment based on machine vision

A technology of surface spots and detection methods, applied in the field of image processing, can solve the problems of high difficulty and high cost of surface spot detection

Active Publication Date: 2020-12-04
YANSHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for spot detection on the surface of ceramic products based on m...

Method used

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  • Ceramic product surface spot detection method and equipment based on machine vision
  • Ceramic product surface spot detection method and equipment based on machine vision
  • Ceramic product surface spot detection method and equipment based on machine vision

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Embodiment Construction

[0069] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0070] The invention provides a method for detecting spots on the surface of ceramic products. The whole process of the detection method is as follows: figure 1 As shown, the schematic diagram of the detection equipment is shown in figure 2 shown.

[0071] The spot detection method on the surface of ceramic products specifically comprises the following steps:

[0072] S1. Use testing equipment to take pictures of ceramic products under different light sources, obtain image information under white, red and yellow light sources, and preprocess the images to obtain pictures under white light source, pictures under red light source and pictures under yellow light source;

[0073] S2. Identify candidate initial points on the edge of the spot, specifically including the following sub-steps:

[0074] S21. Determine the candidate initial points associated with the edge stripe...

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Abstract

The invention provides a ceramic product surface spot detection method based on machine vision. The method comprises the steps that S1, image information under different light sources is acquired, andimages are preprocessed; s2, identifying candidate initial points of spot edges; s3, determining coarse edge points and edge colors through an edge detection model; s4, sub-pixel surface spot edge detection based on an arc tangent function; and S5, the black spot diameter, the red spot diameter and the yellow spot diameter obtained in the step S4 are judged. According to the method, the coarse edges of the three-color spots of the ceramic product are recognized according to the brightness difference of the three-color spots in three illumination environments, the arc tangent function sub-pixel fitting method is applied to recognize the edges of the spots and determine the diameters of the spots, the method has the advantages of short detection time and accurate results, and the actual detection requirements are met.

Description

technical field [0001] The invention relates to image processing technology, in particular to a method and equipment for spot detection on the surface of ceramic products based on machine vision. Background technique [0002] With the increasing automation of the manufacturing industry and the increasingly stringent requirements of modern manufacturing on product surface appearance, size, and performance, the traditional manual naked eye inspection to achieve quality process control during product production has been unable to meet today's enterprises. High-precision, real-time automatic production requirements, therefore, how to realize fast, efficient, high-precision, real-time online surface spot monitoring method has gradually become a difficult problem for modern production enterprises. Especially in the detection of spots on the surface of ceramic products in the field of ceramic production. [0003] Different production processes and impurities in the production proc...

Claims

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Application Information

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IPC IPC(8): G06T7/00G06T7/13G06T7/136G01N21/88
CPCG06T7/0004G06T7/13G06T7/136G01N21/8851G06T2207/10024G06T2207/30108G01N2021/8887
Inventor 张立国马子荐金梅李义辉杨曼李媛媛
Owner YANSHAN UNIV
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