A 3D reconstruction method of pipeline inner wall based on monocular image sequence

An image sequence and three-dimensional reconstruction technology, which is applied in image data processing, 3D modeling, instruments, etc., can solve problems such as pipeline damage, leaks that are not easy to be found in time, and inconvenient maintenance, etc., to achieve simple implementation, fast three-dimensional reconstruction, and calculation Small amount of effect

Inactive Publication Date: 2021-04-20
CHINA UNIV OF MINING & TECH (BEIJING)
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Problems solved by technology

[0002] Corrosion is one of the main causes of pipeline damage and failure. The corrosion of pipelines cannot be directly observed. When leakage occurs, it is not easy to detect in time and it is inconvenient to maintain. Therefore, how to detect the degree of corrosion damage of pipelines is an important issue in pipeline engineering. link

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  • A 3D reconstruction method of pipeline inner wall based on monocular image sequence
  • A 3D reconstruction method of pipeline inner wall based on monocular image sequence

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Embodiment Construction

[0018] The invention is based on the monocular image sequence, obtains the pipeline inner wall image through the monocular image, and uses the triangulation principle to obtain the elevation of the pipeline inner wall on the basis of the pipeline inner wall image, so as to realize the three-dimensional reconstruction of the pipeline inner wall.

[0019] The three-dimensional reconstruction process of the inner wall of the pipeline is as follows:

[0020] (1) if figure 1 As shown, first determine the pipeline center coordinates C and C' of the monocular image D and the monocular image D' respectively;

[0021] (2) Starting from the pipeline center coordinates C and C' respectively, and the angle is θ, determine the straight line on the monocular images D and D', and the angle increases by 1 each time ° , up to 360 ° until;

[0022] (3) Merge the straight lines into a two-dimensional image to obtain pipeline inner wall images I and I' respectively;

[0023] (4) Calculate the...

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Abstract

The invention provides a three-dimensional reconstruction algorithm of the inner wall of the pipeline based on the monocular image sequence. The algorithm is based on the monocular image sequence, determines the coordinates of the center of the pipeline through the monocular image, determines the straight line on this basis, and merges the straight line into a two-dimensional image. Obtain an image of the inner wall of the pipeline. Based on the image of the inner wall of the pipeline, using the principle of triangulation, the elevation of the inner wall of the pipeline is calculated through the difference between the two images of the inner wall of the pipeline, and the three-dimensional reconstruction of the inner wall of the pipeline is realized. The invention has the characteristics of strong adaptability, simple realization and fast rebuilding speed.

Description

technical field [0001] The invention belongs to the field of computer digital image processing. The method is based on a monocular image sequence, uses the principle of triangulation to obtain the elevation of the inner wall of the pipeline, and realizes the three-dimensional reconstruction of the inner wall of the pipeline. Background technique [0002] Corrosion is one of the main causes of pipeline damage and failure. The corrosion of pipelines cannot be directly observed. When leakage occurs, it is not easy to detect in time and it is inconvenient to maintain. Therefore, how to detect the degree of corrosion damage of pipelines is an important issue in pipeline engineering. link. The internal corrosion of the pipeline is caused by the corrosive components contained in the medium transported by the pipeline. The transported medium is different, and the corrosion factors are also different. Through the three-dimensional reconstruction of the inner wall of the pipeline, i...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/00
CPCG06T17/00
Inventor 乔旭王银玲杨峰
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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