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A Bridge Crack Detection Method Based on Dynamic Threshold

A dynamic threshold and detection method technology, applied in image analysis, image enhancement, instruments, etc., can solve the problems of reducing the accuracy of recognition, and achieve strong practicability, high degree of automation, and good recognition effect

Active Publication Date: 2021-12-24
江苏中云筑智慧运维研究院有限公司 +1
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Problems solved by technology

However, when the curvature of the crack is large, the proportion of the crack in the minimum circumscribed rectangle is small, and the length of the diagonal of the rectangle is quite different from the actual length of the crack, which reduces the accuracy of identification

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  • A Bridge Crack Detection Method Based on Dynamic Threshold
  • A Bridge Crack Detection Method Based on Dynamic Threshold
  • A Bridge Crack Detection Method Based on Dynamic Threshold

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Embodiment Construction

[0063] The core of the present invention is to provide a bridge crack detection method based on dynamic threshold, aiming at obtaining the key information of crack area, crack length and crack width required for bridge monitoring, and improving the recognition accuracy and anti-noise of the existing algorithm ability, and has strong robustness, and is suitable for real-time monitoring of most bridge cracks.

[0064] refer to Figure 1-2 , the invention discloses a bridge crack detection method based on a dynamic threshold, characterized in that it includes:

[0065] Step 1. Obtain the original bridge crack image from the image acquisition system, wherein the image acquisition system includes bridge inspection vehicle body 1, image acquisition equipment movable guide rail 2, image acquisition equipment 3, image acquisition equipment support 4 and bridge inspection vehicle working The truss 5, the working truss 5 of the bridge inspection vehicle is connected with the body 1 of ...

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Abstract

The invention provides a bridge crack detection method based on dynamic threshold, which mainly includes: firstly, performing preprocessing on the original data such as grayscale transformation, image enhancement and filtering; value and image segmentation to obtain connected domains that only contain cracked areas and large areas, and regard the connected domains that meet the threshold as cracked areas; then, perform skeleton refinement on the cracked area, and calculate the number of cracks by the number of pixels length and area information; finally, the crack area is segmented by rectangular finite element, and the average width of the crack is calculated. This method has high recognition accuracy and has good engineering application prospects.

Description

technical field [0001] The invention relates to the technical field of bridge monitoring, in particular to a bridge crack detection method based on a dynamic threshold. Background technique [0002] Crack feature image recognition refers to the crack image directly obtained by image acquisition equipment. The image contains many other irrelevant noises that interfere with crack recognition. In order to ensure the reliability and accuracy of bridge crack information extraction, it is necessary to extract cracks from complex backgrounds. Extract it. [0003] At present, the common crack image extraction method is mainly to remove part of the noise from the original crack image through a series of preprocessing such as filtering and denoising, and then perform image segmentation to turn it into a binary image. By setting a fixed threshold, the Connected domains with areas smaller than fractures are removed, thereby extracting fracture regions. However, the set fixed threshold...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00G06T7/10G06T7/136G06T7/187G06T5/00G06T5/40
CPCG06T7/0002G06T7/10G06T7/136G06T7/187G06T5/002G06T5/40G06T2207/10004G06T2207/30132
Inventor 杨国玉李帅王博昆杨景杨才千张浩张益伟
Owner 江苏中云筑智慧运维研究院有限公司