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Crack Location Finding Method Based on Gray Peak

A gray value, grayscale technology, applied in image data processing, instruments, calculations, etc., can solve problems such as low accuracy, poor ability to deal with noise points, etc., to achieve good applicability and accuracy, good suppression ability, easy to find effect of effect

Active Publication Date: 2018-01-23
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of the existing crack search algorithm, such as low precision and poor ability to deal with noise points, the present invention provides a crack position search method based on gray peaks with high precision and good ability to suppress noise pixels

Method used

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  • Crack Location Finding Method Based on Gray Peak
  • Crack Location Finding Method Based on Gray Peak
  • Crack Location Finding Method Based on Gray Peak

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] refer to figure 1 ~Fig. 4, a crack position finding method based on the gray scale peak, including the following steps:

[0034] 1) Initialize, perform grayscale transformation and negative phase transformation on the target image to convert it into a negative phase grayscale image, and set the initial threshold at the same time.

[0035] 1.1) Using the grayscale transformation in the RGB color space, the original color image is converted into a grayscale image. For the convenience of detection and description, the grayscale image is negatively transformed, that is, the smaller grayscale value that originally represents the crack is changed to is a larger value, where the grayscale transformation can adopt the grayscale transformation empirical formula of the linear transformation method (where R, G, and B represent the pixel values ​​of the three channels of t...

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Abstract

The invention relates to a crack position searching method based on a gray peak value. According to the method, 1), initiation, a target image is converted into a negative phase gray graph through gray transformation and negative phase transformation, and an initial threshold is set; 2), a chain type search for crack target pixel points, an algorithm flow as a graph 2 is searched based on the target pixel points of the gray peak value; and 3), suspicious points outside a confidence interval are eliminated, and high order curve fitting is utilized for the crack. The method is advantaged in that relatively good inhibition capability for discrete noise points in the background is realized, and crack position searching is realized through gray peak value chain type searching and curve fitting.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a crack position searching method. Background technique [0002] The convenience of transportation promotes the local economic development, and the economic development reacts on the construction of transportation. With the rapid development of my country's economy, a large number of roads and bridges have been built, and these buildings will have many cracks over time. Cracks not only affect the beauty of the building structure, but also cause corrosion of the steel bars in the concrete, accelerate the aging of the concrete, weaken the load capacity of the building, and affect the reliability of the building. Different from the past, today's bridges are hundreds or even nearly a thousand meters long, and they play the role of transportation hubs between cities. Once they break or collapse, they will cause inconvenience to transportation, and cause traffic acc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00G06T7/40
CPCG06T2207/30132
Inventor 陈晋音郑海斌程龙杜文耀
Owner ZHEJIANG UNIV OF TECH
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