Method and system for detecting the proportion of cracks in pavement image
A detection method and detection system technology, applied in image enhancement, image analysis, image data processing, etc., can solve the problems of inability to calculate the proportion of cracks, provide evidence, and cannot evaluate the degree of impact of cracks.
Inactive Publication Date: 2020-11-10
杨静
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[0007] The purpose of the present invention is to provide a crack detection method and system in road image, to solve the crack detection method in the road image in the prior art because it cannot calculate the proportion of cracks in the road image and cannot provide a solution for evaluating the degree of influence of cracks. Based on the question
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[0050] Method example:
[0051] This embodiment provides a method for detecting the proportion of cracks in a pavement image, which is used to detect the proportion of cracks in the pavement image, and provides a basis for evaluating the degree of influence of cracks.
[0052] The road surface image crack ratio detection method provided by this embodiment, its flow process is as follows figure 1 shown, including the following steps:
[0053] Step 1: Acquire the road surface image, preprocess it, and eliminate the noise signal in it.
[0054] The process of preprocessing the road image is as follows: figure 2 shown, including the following steps:
[0055] 1.1: Grayscale processing is performed on the collected road surface images, and the linear grayscale transformation spatial domain enhancement method is used to increase the pixel difference between the image background and the crack, so that the crack is more prominent from the background.
[0056] Since the human eye h...
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The invention provides a method and a system for detecting the proportion of cracks in a pavement image. The detection method comprises the following steps: acquiring the pavement image and preprocessing the pavement image; establishing a plane coordinate system, and placing the pavement image in the established plane coordinate system; randomly selecting a pixel point from the pavement image, taking the pixel point as a starting point, obtaining a test point at an interval of a first set distance, obtaining a gray value of each test point, and judging whether the difference between the maximum value and the minimum value is greater than a set pixel difference value; if yes, taking the pixel point with the maximum gray value as the initial point of the crack area; performing self-growth from the initial point of the crack area to obtain pixel points of the crack area; establishing a square by taking each pixel point of the crack area as a center; and obtaining the proportion of the cracks on the pavement image according to the number of the squares in the crack area and the total number of the squares on the pavement image. According to the method provided by the invention, a basiscan be provided for evaluating the influence degree of cracks.
Description
technical field [0001] The invention belongs to the technical field of pavement crack detection, and in particular relates to a crack ratio detection method and system in a pavement image. Background technique [0002] With the continuous construction of highways and the continuous improvement of highway infrastructure, the transportation efficiency and transportation capacity of highways are also constantly improving. The research on road maintenance and disease detection methods has gradually received attention. The road conditions are complex and diverse. Whether it is asphalt or cement pavement, after a period of time of traffic opening, cracks appear on the pavement due to the external environment, which brings great hidden dangers to the normal use of the pavement. [0003] Cracks on the road surface are a relatively common phenomenon. In order to ensure the long-term normal use of the road, municipal personnel are required not only to improve the construction quality ...
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IPC IPC(8): G06T7/00G06K9/00
CPCG06T7/0002G06T2207/10024G06T2207/20101G06V20/13G06V2201/07
Inventor 杨静
Owner 杨静