Space curved surface reconstruction method based on boundary constraint

Abstract

The invention discloses a space curved surface reconstruction method based on a boundary constraint. The space curved surface reconstruction method based on the boundary constraint mainly comprises the steps of (1) collecting original horizon data points and fault data points, and drawing a hanging wall polygon and a heading wall polygon; (2) obtaining height attributes, relation attributes and projection attributes of the original horizon data points and points on the fault polygons; (3) carrying out connection on the original horizon data points and the points of the fault polygons through triangle gridding with the constraint; (4) accomplishing splicing of internal areas and external areas of the hanging wall polygon and the heading wall polygon, namely, accomplishing reconstruction of a three-dimensional space curved surface. The space curved surface reconstruction method based on the boundary constraint solves the problem of reconstruction of the horizon curved surface of the complex terrain in the process of three-dimensional geologic modeling, provides a new idea for isoline drawing, geological block forming and the like, can be applicable to various discrete points or lateral line data, and low in requirement for data, can support various faults such as 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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