Power equipment three-dimensional model matching method based on equidistant mapping

Abstract

The invention discloses a power equipment three-dimensional model matching method based on equidistant mapping, and the method comprises the steps: carrying out the preprocessing of a plurality of to-be-matched power equipment three-dimensional models, so as to enable the plurality of to-be-matched power equipment three-dimensional models to have the same vertex number; constructing a geodesic distance matrix for the to-be-matched power equipment three-dimensional model, and obtaining a geodesic distance matrix of each power equipment three-dimensional model; embedding the vertex of the three-dimensional model of the power equipment to be matched into the one-dimensional Euclidean space to obtain a one-dimensional scalar set; according to the one-dimensional scalar set, obtaining a postureinvariance feature set of the to-be-matched power equipment three-dimensional model; and measuring the similarity of a plurality of to-be-matched power equipment three-dimensional models by utilizingthe posture invariance feature set. According to the power equipment three-dimensional model matching method, the posture invariance feature set has invariance for matching of the power equipment three-dimensional models with different working states, scales, sampling, rotating and translation operations; the similarity between the power equipment three-dimensional models can be effectively measured; and particularly, efficient matching of non-rigid three-dimensional models is achieved.

Description

Technical field [0001] The invention belongs to the technical field of three-dimensional digital model retrieval, and relates to a non-rigid three-dimensional model posture invariance matching method based on isometric mapping applied to the retrieval of three-dimensional digital models of power equipment. Background technique [0002] A three-dimensional digital model refers to a three-dimensional representation of an object, which can be an object in the real world or a fictional object. Three-dimensional digital models are usually generated using three-dimensional modeling tools, using point clouds to form a grid of the three-dimensional model, and the grid to form a three-dimensional model. With the development of power informationization, three-dimensional models of power equipment play an important role in power engineering. In recent years, three-dimensional models of power equipment have been widely used in power information systems such as EGIS (Power Geographic Informa...

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Problems solved by technology

Most traditional methods focus on identifying rigid models, and are less effective in identifying non-rigid models

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