Tunnel crack width calculation method based on digital image
A technology of digital image and crack width, applied in the directions of calculation, image enhancement, image analysis, etc., can solve the problem of inability to obtain crack width, and inability to determine the location of irregular inflection points of cracks.
Active Publication Date: 2021-01-22
安徽国钜工程机械科技有限公司 +1
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[0004] Aiming at the deficiencies in the prior art, the present invention provides a method for calculating the width of tunnel cracks based on digital images, which solves the problem that the existing calculation method for the width of tunnel cracks cannot be determined The position of the irregular inflection point of the crack, and the problem that the width of the crack at the irregular position cannot be obtained
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[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0026] see Figure 1-3 , an embodiment of the present invention provides a technical solution: a method for calculating the width of a tunnel crack based on a digital image, specifically comprising the following steps:
[0027] S1. For the crack image collected, first extract the features of the crack by digital image method, highlight the crack area, and then process it through digital image processing method, the background pixel value becomes 0, and the cra...
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The invention discloses a tunnel crack width calculation method based on a digital image, and the method specifically comprises the following steps: S1, extracting the features of a crack of an acquired crack image through a digital image method, highlighting a crack region, and enabling a background pixel value to become 0 and the crack region to be 255 after the crack region is processed througha digital image processing method; S2, traversing contour pixels of the crack, finding out all inflection point positions, and taking the contour pixels as a 3 * 3 range of the center; and S3, the width of the crack is the distance 1 between the inflection point A (xA, yA) and a certain point B (xB, yB) of the contour of the other end, and the invention relates to the technical field of tunnel safety monitoring. According to the tunnel crack width calculation method based on the digital image, some special positions such as the crack width at the inflection point can be taken into consideration on the basis of using the average model, so that the risk level evaluation is close to the real condition, the irregular inflection point position of the crack can be determined, and the width of the crack at the irregular position can be solved.
Description
technical field [0001] The invention relates to the technical field of tunnel safety monitoring, in particular to a method for calculating the width of tunnel cracks based on digital images. Background technique [0002] With the rapid development of tunnel construction in my country, my country's tunnels have now stepped out of the construction period and entered the "high maintenance" management period. Tunnel lining cracks are one of the most common and dangerous tunnel diseases. Therefore, the detection of lining cracks has great significance. very important meaning. Crack width is an important parameter to measure cracks, which is very important to the safety of tunnels. However, cracks in tunnels are generally very irregular, and it is difficult to measure the width of tunnel cracks. The current image-based calculation method of crack width is mainly occupied by cracks. The ratio of the number of pixels to the crack length. However, this method ignores the sudden chan...
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IPC IPC(8): G06T7/00G06K9/46G06T7/62
CPCG06T7/0004G06T7/62G06T2207/30132G06V10/44
Inventor 王洪战王昌洪程腾金泽华刘丹妮王磊谭奇琦方广欣张保兵
Owner 安徽国钜工程机械科技有限公司