Processing method of pavement crack image

A technology for pavement cracks and processing methods, applied in image data processing, image analysis, instruments, etc., can solve problems such as the impact of cracks, achieve the effects of overcoming interference, eliminating adverse effects, and fast calculation speed

Active Publication Date: 2018-01-12
SOUTHEAST UNIV
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Problems solved by technology

These interference factors will have a significant impact on the extraction of fractures

Method used

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  • Processing method of pavement crack image
  • Processing method of pavement crack image
  • Processing method of pavement crack image

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Embodiment Construction

[0034] This embodiment is based on the following assumptions to realize the image segmentation of the pavement crack image:

[0035] 1. Crack pixels are deeper than road pixels;

[0036] 2. The gray distribution of road cracks and road surface is independent;

[0037] 3. A crack is a narrow, continuous target object;

[0038] 4. A crack is a group of interconnected segments with different directions;

[0039] 5. The width of a crack is not constant over the entire length;

[0040] Based on the above assumptions, the similarity in gray value between pavement cracks and pavement is used. This embodiment uses an iterative method to gradually process the pavement crack image, obtain the seed image, remove the noise, and then perform regional seed growth on the pavement crack image with the "growth fence" to obtain the segmentation effect. This embodiment does not rely on gray The gray histogram of high-resolution images also has good adaptability to low-contrast and uneven ill...

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Abstract

The invention discloses a processing method of a pavement crack image. The method mainly includes the following contents: 1, using an OTSU method to process the pavement crack image through an iteration process, and eliminating non-confidence regions in all iteration results in the pavement crack image; 2, executing a preprocessing algorithm which is of lesser iteration frequency and used on the pavement crack image; and 3, carrying out excessive iteration on the pavement crack image, processing a result, then using a processed result as a seed image, eliminating tiny regions in the seed image, utilizing an edge detection algorithm to set a ''growth fence'' in the pavement crack image, and finally completing image segmentation through regional seed growth. The pavement crack image processing method provided by the invention obviously improves an image preprocessing effect and an image segmentation effect, overcomes interference of noisy noises in the image, is higher in calculation efficiency, has higher robustness, is stable in performance, is applied to intelligent identification and statistics of pavement crack diseases, and improves identification precision and statistic efficiency of the pavement crack diseases.

Description

technical field [0001] The invention belongs to the field of road engineering and image processing technology, and in particular relates to a method for processing road surface crack images. Background technique [0002] As of the end of 2016, the total mileage of national highways reached 130,000 kilometers, ranking first in the world. The large-scale construction of highways not only affects economic development, but also affects people's daily life, which makes the detection and maintenance management of highways increasingly important and urgent. At present, with the development of sensor, automatic control, computer and other technologies, the automatic collection equipment of pavement images has become mature, but the crack identification in the later stage still adopts the combination of human and machine or even completely manual, which has a large workload and low efficiency. Developing an algorithm for the pavement crack images collected by the detection vehicle, ...

Claims

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Application Information

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IPC IPC(8): G06T7/10G06T7/13
Inventor 顾兴宇邓涵宇王晓威倪富健
Owner SOUTHEAST UNIV
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