Space Surface Reconstruction Method Based on Boundary Constraints

Abstract

The invention discloses a space surface reconstruction method based on boundary constraints. The method mainly includes: collecting original horizon data points and fault data points, drawing hanging wall polygons and footwall polygons; calculating original horizon data points and fault polygons The height attribute, relationship attribute and projection attribute of the points on the upper wall; use the triangle meshing with constraints to connect the original horizon data points and the points on the fault polygon; complete the splicing of the inner and outer regions of the hanging wall polygon and footwall polygon, that is Complete the reconstruction of the three-dimensional space surface. The present invention solves the problem of horizon surface reconstruction under complex terrain in three-dimensional geological modeling, provides new ideas for contour drawing, geological block formation, etc., and can be applied to various discrete point or lateral line data, and can be used for data analysis The requirements are not high; it can support various types of faults, including various complex terrain structures such as normal faults, reverse faults and vertical faults, and has good adaptability.

Description

technical field [0001] The invention belongs to the technical field of three-dimensional geological modeling, and in particular relates to the design of a space surface reconstruction method based on complex boundary constraints. Background technique [0002] Surface reconstruction of spatial points is an integral part of 3D geological modeling. It uses computer technology to reconstruct surfaces. Its essence is to use discrete points in 3D space to connect them into a surface in a certain order. Point-based cloud processing technology is a subject that has developed rapidly with the development of data measurement technology. This technology uses points as the basis for reconstructing objects, improving the speed of object drawing and reconstruction, strengthening large-scale data processing capabilities and Computer processing capacity and other aspects have huge advantages, and it is a hot spot in reverse engineering research. At present, with the increasing social demand...

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Problems solved by technology

The horizontal interpolation reconstruction method based on the surrounding distance, although the concept of the surrounding distance is introduced, it does not completely eliminate the influence of improperly affecting the interpolation data, and the interpolation effect is still unable to restore the surface intact

[0005] But for now, these schemes have their limitations, which are mainly manifested in: most of the foreign reconstruction schemes are aimed at layers without faults, while some domestic software takes normal faults into account, but there are basically no reverse faults and multiple faults. Consider; for some applications considering reverse faults, the quadrilateral grid is generally used to restore the surface, which cannot completely represent the original surface; many geological surface reconstruction algorithms use a large number of complex surface interpolation algorithms and seed point calculation algorithms to distinguish Up and down the plate, the algorithm is not efficient; most reconstruction schemes do not consider the contour construction in complex geological constraints

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