Crack size measurement method and device based on digital image and electronic device

A digital image, crack size technology, applied in image enhancement, image analysis, image data processing and other directions, can solve the problems of inaccurate measurement and slow speed

Pending Publication Date: 2019-06-14
新而锐电子科技(上海)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Therefore, the existing methods for measuring cracks

Method used

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  • Crack size measurement method and device based on digital image and electronic device
  • Crack size measurement method and device based on digital image and electronic device
  • Crack size measurement method and device based on digital image and electronic device

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Embodiment Construction

[0058] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0059] It should be clear that the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0060] In the present invention, the tunnel crack image is used as the input image. Firstly, the input image is preprocessed, and the region of interest is extracted from the preprocessed input image using the region of interest mask obtained by other technical means. The region of interest The range where the crack is located is further narrowed down, and then the crack is detected from the region of interest by digital image processing.

[0061] see figure 1 , figure 1 It is an overall flow chart of the digital i...

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Abstract

The embodiment of the invention discloses a crack size measurement method based on a digital image, which is used for crack detection and measurement, and comprises the following steps of carrying outdigital image processing on an input image, obtaining an interested region image through an interested region mask, and carrying out contrast enhancement processing on the interested region image toobtain a preprocessed image; performing threshold processing on the preprocessed image, and segmenting the crack from the image to obtain a crack area image; carrying out refining processing on the crack region image in the threshold image to obtain a crack skeleton image; acquiring the area image coordinates of the crack area image and the skeleton image coordinates of the crack skeleton image respectively, and measuring the crack size by using the skeleton image coordinates and the area image coordinates, so that the problems of low speed and inaccurate measurement of the existing crack measurement method are avoided, and the material can be rapidly and accurately detected and measured.

Description

technical field [0001] The invention belongs to the field of digital image processing, and in particular relates to a digital image-based crack size measurement method, device and electronic equipment. Background technique [0002] Cracks are cracks produced by materials under the action of stress or environment (or both), and are mainly divided into micro cracks and macro cracks. Crack growth is a process in which cracks continue to expand in the material or environment (or both at the same time). The expansion to a certain extent will lead to the fracture of the material and cause safety hazards. [0003] In recent years, a lot of manpower and material resources have been invested in the automatic detection and measurement of cracks at home and abroad, and good results have been achieved. One of the most effective methods in crack automatic detection and measurement technology is based on digital image processing. [0004] Digital image processing refers to the technolog...

Claims

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Application Information

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IPC IPC(8): G06T7/00G06T7/60G06T5/00G06T7/11G06T7/136
Inventor 李清勇孟青龙郑黎明刘滨
Owner 新而锐电子科技(上海)有限公司
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