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Point cloud clipping-based generation method for spatial curved surface

A surface and space technology, applied in the field of space surface generation based on point cloud clipping, to achieve good adaptability, speed improvement, and good versatility

Inactive Publication Date: 2013-01-16
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a spatial surface generation method based on point cloud clipping, which solves the problem of 3D horizontal surface generation under the condition of complex reverse faults

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  • Point cloud clipping-based generation method for spatial curved surface
  • Point cloud clipping-based generation method for spatial curved surface
  • Point cloud clipping-based generation method for spatial curved surface

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Embodiment Construction

[0038] First define some basic geological structures and scheme terms:

[0039] (1) Horizon: It refers to a specific position in the stratigraphic sequence. The stratigraphic horizon can be the boundary of a stratigraphic unit, or it can be a marker layer belonging to a specific era, etc.

[0040] (2) Fault: A structure in which the crustal rock layer is ruptured due to the force reaching a certain strength, and there is obvious relative movement along the rupture surface.

[0041] (3) Data block: A technology that uses specific rules to divide a large amount of data into several data blocks.

[0042] (4) Surface reconstruction: the process of generating spatial surfaces using points in space.

[0043] (5) Hanging inventory: all intersections of faults and hanging wall horizons.

[0044] (6) Footwall check: all intersections of faults and footwall layers.

[0045] (7) Delaunay triangulation algorithm: Given a set of nodes on a two-dimensional plane P={P0, P1,...,Pn}, where ...

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Abstract

The invention discloses a point cloud clipping-based generation method for a spatial curved surface. A curved surface can be reconstructed under a complex reverse fault condition, a data blocking concept is used for dividing data on the curved surface into data under a constraint condition and data beyond the constraint condition, and triangularly meshing the data respectively, so that the problem of large data volume is well solved, and triangular meshing speed is increased. The method has the advantages that various faults comprising normal faults and reverse faults are supported, so that the method has high adaptability; various kinds of application taking complex polygons as constraint conditions are supported, so that the method is highly universal; and the clipping problems of the complex polygons are solved.

Description

technical field [0001] The invention relates to a space surface generation method based on point cloud clipping. Background technique [0002] In recent years, point cloud technology has important applications in geological exploration and manufacturing, and surface reconstruction is the core content of point cloud processing. At present, the main methods of point cloud reconstruction surface technology are as follows; [0003] (1) Reconstruction algorithm based on surface unit: The reconstruction algorithm based on surface unit is a new normal vector testing algorithm, which searches for the local best normal along the surface of the measured object step by step in a manner similar to advancing the wavefront until All points have the correct direction; at the same time, local spherical surface units are generated at each point, and discrete sample points are expressed by surface units. This algorithm does not fully consider the problem of surface reconstruction with constra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/30G06T17/05
Inventor 姚兴苗蒋有文
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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