Point cloud based quick reconstruction STL digital model generation method

A point cloud data, point cloud technology, applied in 3D modeling, image data processing, instruments, etc., can solve the problem of time-consuming STL model surface and other issues

Active Publication Date: 2018-03-06
SOUTHEAST UNIV
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Problems solved by technology

[0005] Purpose of the invention: In order to overcome the existing technical defects, solve the problem of time-consuming and surface defects of the reconstructed STL model in the point cloud-based STL digital model generation algorithm, and provide a STL digital model generation method based on point cloud rapid reconstruction, On the premise of retaining the basic characteristics of point cloud, the rapid reconstruction of STL digital model is realized

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  • Point cloud based quick reconstruction STL digital model generation method
  • Point cloud based quick reconstruction STL digital model generation method
  • Point cloud based quick reconstruction STL digital model generation method

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Embodiment Construction

[0077] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0078] Such as figure 1 As shown, a kind of STL digital model generating method based on point cloud rapid reconstruction of the present invention comprises the following steps:

[0079] (1) Extract point cloud features

[0080] First, the voxel grid method is used to down-sample the input point cloud, and the basic characteristics of the point cloud shape are retained when reducing the point cloud scale; then, the statistical analysis method is used to remove measurement noise points from a point cloud dataset; finally The point cloud feature extraction based on the random sampling consistent RANSAC algorithm is used to extract a subset of point clouds that meet the requirements. The flow chart of the algorithm is as follows figure 2 As shown, the specific steps include:

[0081] (11) The voxel grid method is us...

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Abstract

The invention discloses a point cloud based quick reconstruction STL digital model generation method. The method includes performing simplified filtering and characteristic extraction on input point cloud; performing curve reconstruction on surface point cloud on a digital model; establishing a model topologic relation on the STL digital model and performing grid simplification; performing hole detection and repair on the simplified STL digital model so as to remove defects in the model. According to the invention problems of laser scanning point cloud based STL model reconstruction can be solved effectively. The STL model is generated through steps including point cloud characteristic extraction, model reconstruction and the like and automatic repair of surface defects of the generated STL model is realized through grid simplification and hole repair technology, so that quick reconstruction of the STL digital model is realized and the availability of the reconstructed STL digital model is improved in the premise of keeping basic characteristics of point cloud, and great demands in different fields such as robot offline programming technology, automatic track planning technology and the like in a smart manufacture process can be met.

Description

technical field [0001] The invention relates to the technical field of advanced manufacturing of industrial robots such as off-line programming, intelligent manufacturing, trajectory planning, etc., in particular to an STL digital model generation method based on point cloud rapid reconstruction. Background technique [0002] Due to the measurement accuracy of the equipment, the operating experience of the experimenters, and environmental factors, the obtained data often has problems such as redundant data, noise points, and outliers, which will affect the effect of point cloud modeling. In order to obtain a CAD model with better quality and higher accuracy, it is necessary to take a series of processing operations on the acquired data, mainly including point cloud simplification, point cloud filtering, feature extraction, model reconstruction and other operations. [0003] STL is a file format used to represent triangular meshes in computer graphics application systems. It ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/30
Inventor 周波刘阳马旭东孟正大
Owner SOUTHEAST UNIV
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