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Tunnel cross section feature extraction method and device, equipment and storage medium

A feature extraction, cross-sectional technology, applied in image analysis, image enhancement, instrumentation, etc., can solve problems such as data imbalance, low tunnel accuracy, residual data deviation, etc.

Active Publication Date: 2022-05-13
中铁建华南建设有限公司 +2
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Problems solved by technology

[0003] However, the 3D point cloud data obtained by 3D laser scanning technology is very large. In the traditional technology, the least square method is often used to fit the cross section, and the line type of the tunnel is obtained from the center position of the cross section in the direction of extension. However, when the 3D point When there are noise points, outliers, grooves and bulges in the lining in the cloud data, the least squares method cannot filter out these abnormal data, which makes the accuracy of tunnel measurement low
If the method of setting thresholds is used to eliminate abnormal data, when the parameters are not selected properly, it is easy to cause data imbalance, resulting in a deviation between the mean value of the remaining data and the actual mean value

Method used

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  • Tunnel cross section feature extraction method and device, equipment and storage medium
  • Tunnel cross section feature extraction method and device, equipment and storage medium
  • Tunnel cross section feature extraction method and device, equipment and storage medium

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Embodiment Construction

[0052] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0053] In one embodiment, such as figure 1 As shown, a method for extracting features of a tunnel cross-section is provided. This embodiment uses the method applied to a server as an example for illustration. It can be understood that this method can also be applied to a terminal, and can also be applied to a system including a terminal and a server. , and realized through the interaction between the terminal and the server. In this embodiment, the method includes the following steps:

[0054] Step S101, performing sampling processing on the cross-section data of the cro...

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Abstract

The invention relates to a tunnel cross section feature extraction method and device, computer equipment, a storage medium and a computer program product, is applied to the technical field of tunnel three-dimensional point cloud data feature extraction, and is used for improving the accuracy of tunnel cross section feature extraction. The method comprises the following steps: sampling cross section data of a target tunnel cross section to obtain sampling data; inputting the sampling data into a parameter estimation model corresponding to the cross section of the target tunnel, and estimating parameters in a contour line fitting model corresponding to the cross section of the target tunnel through the parameter estimation model based on the sampling data to obtain estimated values of the parameters in the contour line fitting model; and inputting the estimated value into the contour line fitting model to obtain a contour line of the target tunnel cross section as a first target feature of the target tunnel cross section.

Description

technical field [0001] The present application relates to the technical field of feature extraction of tunnel three-dimensional point cloud data, in particular to a tunnel cross-section feature extraction method, device, computer equipment, storage medium and computer program product. Background technique [0002] After the construction of the tunnel is completed, it is necessary to measure the excavated tunnel to obtain the actual size of the tunnel to determine the error between the actual size of the tunnel and the design size, and then make reasonable adjustments to the construction of the subsequent track and catenary. The deviation between the actual size of the tunnel obtained through detection and the design size is also used to determine parameters such as tunnel vault settlement, over-excavation and under-excavation, axis offset, etc., to check whether the excavated tunnel meets the target task requirements. Three-dimensional laser scanning technology has the chara...

Claims

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Application Information

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IPC IPC(8): G06T7/13G06T7/143
CPCG06T7/13G06T7/143G06T2207/10028G06T2207/20076G06T2207/30132
Inventor 陈前崔力波许丹章邦超周智赵明明赵国臣林海斌朱兴吉
Owner 中铁建华南建设有限公司
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