Aircraft thick skin end face feature point extraction and denoising method based on laser scanning

A feature point extraction and laser scanning technology, which is applied in image data processing, instruments, calculations, etc., can solve problems such as low efficiency, poor stability, and low precision, and achieve high efficiency and convenient use

Active Publication Date: 2019-08-02
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of poor stability, low precision and low efficiency in the existing skin end face feature point extraction method, and combine laser scanning technology to invent a laser scanning based aircraft thick skin end face feature point extraction and denoising method

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  • Aircraft thick skin end face feature point extraction and denoising method based on laser scanning
  • Aircraft thick skin end face feature point extraction and denoising method based on laser scanning
  • Aircraft thick skin end face feature point extraction and denoising method based on laser scanning

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Embodiment Construction

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] like Figure 1-5 shown.

[0030] A laser scanning-based feature point extraction and denoising method for aircraft thick skin end face, which is characterized in that: comprising the following steps

[0031] 1) Scan the side of the thick skin, and extract feature points through the point-to-plane distance;

[0032] 2) According to the Euclidean distance from other points in the point cloud to the boundary feature points, the neighborhood of the boundary feature points is obtained, and then the sharp features and the boundary feature points on the short side of the end face are denoised;

[0033] 3) Extract the missing feature points at the sharp features.

[0034] The specific solution algorithm is as follows:

[0035] 1) Feature point extraction:

[0036] Perform block processing on the scan results of skin A, extract 30 (or any number betwee...

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Abstract

The invention discloses an aircraft thick skin end face feature point extraction and denoising method based on laser scanning. The method is characterized by firstly scanning the side surface of a thick skin; extracting feature points through the distances from the points to the plane, solving the neighborhood of the boundary feature points according to the Euclidean distances from other points inthe point cloud to the boundary feature points, denoising the sharp features and the boundary feature points at the short edges of the end faces, and finally re-extracting the missing feature pointsat the sharp features. The method has the advantages that (1) compared with a method for extracting feature points through a single scanning line, the feature points extracted through the method are better in stability and higher in precision, (2) for skin end faces of different shapes, the method can obtain better feature points and provide accurate data for end face fitting, and (3) the method is convenient to use and higher in efficiency.

Description

technical field [0001] The invention relates to an aircraft manufacturing technology, in particular to an aircraft skin manufacturing technology, in particular to a laser scanning-based feature point extraction and denoising method for an aircraft thick skin end face. Background technique [0002] As we all know, in the process of aircraft skin manufacturing, especially in the process of zigzag skin processing, in order to reasonably plan the processing trajectory, it is necessary to sort the end face scan line data and reconstruct the end face. Use the end face to extract the trim amount, and use the end face to intersect with the upper surface of another piece of skin for subsequent processing trajectory extraction. When extracting point cloud feature points, the boundary feature points of the skin end face are first extracted. At present, many scholars at home and abroad have studied the boundary feature recognition of measurement data, mainly using the curvature extreme ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T7/13G06T7/136
CPCG06T7/0004G06T7/13G06T7/136
Inventor 李泷杲黄翔杨角龙
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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