Non-topological consistent three-dimensional geological block tracking method based on visual observation

A three-dimensional geological and consistent technology, applied in image data processing, 3D modeling, instruments, etc., can solve problems such as interlaced canine teeth, dense and uneven triangulation, missing blocks, etc.

Active Publication Date: 2018-04-06
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

When the geological model is complex, multiple intersections and clippings make the TIN become dense and uneven near the intersection line, and the size difference of the TIN becomes larger, making it difficult to obtain a topologically consistent TIN surface
Using the traditional block tracking algorithm to track blocks of this locally non-topologically consistent model will lead to unexpected errors: unclosed blocks may be obtained, and dog teeth may appear at intersections; it may also be completely missing blocks

Method used

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  • Non-topological consistent three-dimensional geological block tracking method based on visual observation
  • Non-topological consistent three-dimensional geological block tracking method based on visual observation
  • Non-topological consistent three-dimensional geological block tracking method based on visual observation

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Embodiment 1

[0079] 1 Import the original model information, such as Figure 6 In the case shown, a 3D ground plane TIN model was imported. The length of the model in the x direction is 32000, the length in the y direction is 18000, the depth in the z direction is 15800, and the mesh precision of the mesh division is set to 200;

[0080] 2 Divide the 3D stratigraphic triangulation model into uniform mesh bodies. At this time, the model space is evenly divided into 1,137,600 mesh bodies with a length, width, and height of 200, of which there are 160 mesh bodies in the direction of each line parallel to the x-axis , there are 90 in the direction of each line parallel to the y-axis, and 790 in the direction of each line parallel to the z-axis;

[0081] 3 Record all the triangle information contained in each mesh body;

[0082] 4Use the visual observation type outer surface judgment algorithm to obtain the triangle set of the outer surface corresponding to each block. Figure 7 In the displ...

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Abstract

The invention discloses a non-topological consistent three-dimensional geological block tracking method based on visual observation. The method comprises steps that (1), a three-dimensional ground level triangulation network model is introduced, and grid accuracy for grid division of the three-dimensional geological model space is set by a user; (2), fixed grid division of the three-dimensional ground level triangulation network model is carried out; (3), all the triangle information contained in each grid body is recorded; and (4), a diffusion block tracking method based on visual observationis utilized to acquire an outer surface triangle set corresponding to each block. The method is advantaged in that not only can model block tracking of the three-dimensional ground level triangulation network model having no topological consistency be carried out, but also the accurate result can be acquired on the condition that an original three-dimensional ground level triangulation network model has no topological consistency.

Description

technical field [0001] The invention relates to the technical field of three-dimensional geological modeling, in particular to a non-topologically consistent three-dimensional geological block tracking method based on visual observation. Background technique [0002] In 3D geological modeling, stratigraphic layers are represented by triangulation. Tracking the block refers to finding out a set of triangles in the triangular network that can be used as the surface of the block. When multiple layers intersect, if there is no topological disorder in the triangles of the intersecting parts of multiple layers, then these layers are said to have topological consistency. In order to ensure the topological consistency of the surface model before the traditional block tracking algorithm is executed, surface intersection and clipping operations are required. When the geological model is complex, multiple intersections and clippings make the TIN become dense and uneven near the inter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/05G06T17/20
CPCG06T17/05G06T17/20
Inventor 邓飞隆振海房鹏
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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