Surface defect detection method, device and equipment and storage medium

A defect detection and defect technology, applied in image data processing, instrumentation, calculation, etc., can solve the problem of low accuracy

Active Publication Date: 2021-04-16
SHANGHAI AIRCRAFT MFG
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Problems solved by technology

[0005] The invention provides a surface defect detection method, device, equipment and storage me

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  • Surface defect detection method, device and equipment and storage medium
  • Surface defect detection method, device and equipment and storage medium
  • Surface defect detection method, device and equipment and storage medium

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[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

[0030] The surface defect detection method provided by the embodiment of the present invention is based on the principle of photometry. By using the principle of diffuse reflection and the optical characteristics generated by the irradiation of multi-angle light sources, the method of restoring the surface state of the aircraft skin is realized, so as to realize scratches on the surface of the aircraft skin, Accurate detection of defects such as dents, peeling paint, and bumps.

[0031] figure 1 It is a schematic...

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Abstract

The invention discloses a surface defect detection method, device and equipment and a storage medium, and the method comprises the steps: obtaining a detection picture of the surface of a to-be-detected object under the irradiation of a plurality of light sources, wherein the number of the plurality of light sources is at least three; according to the gray value of the pixel point in each detection picture and the direction vector of each light source at the pixel point, determining normal graphs corresponding to the plurality of detection pictures, wherein the normal graphs is used for indicating the normal vector of each pixel point in the detection pictures; determining a gradient graph of the normal graph according to the normal graph, wherein the gradient graph is used for indicating a gradient value of each pixel point in the normal graph; and determining a defect area according to an area formed by the pixel points with the corresponding gradient values greater than a preset threshold in the gradient map. The surface defect detection method is high in detection accuracy.

Description

technical field [0001] The embodiments of the present invention relate to the field of defect detection, and in particular, to a surface defect detection method, device, equipment, and storage medium. Background technique [0002] Aircraft skin refers to the three-dimensional component that surrounds the aircraft skeleton structure and is fixed on the skeleton with adhesives or rivets to form the aerodynamic shape of the aircraft. It is an important structure for the aircraft to maintain a good aerodynamic shape. During the flight, the aircraft skin will be subject to changing external pressure all the time, and its surface defects will affect the safety of flight. Therefore, it is very important to detect surface defects of aircraft skin. [0003] At present, traditional machine vision is mainly used for detection: the image of the aircraft skin surface illuminated by a single light source is collected, and then the image enhancement technology makes the contrast between t...

Claims

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Application Information

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IPC IPC(8): G06T7/00
Inventor 左正新王飞亚汪顺利卢丹范秋敏
Owner SHANGHAI AIRCRAFT MFG
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