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Non-popular grid model slicing processing method

A processing method and grid model technology, applied in image data processing, 3D modeling, instruments, etc., can solve problems such as difficult to repair, achieve the effect of improving effectiveness and robustness, and avoiding complex mathematical calculations

Pending Publication Date: 2021-01-05
JIAXING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the non-popular model is processed by the slicing method of the traditional popular grid model, it will lead to wrong results that are difficult to repair

Method used

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  • Non-popular grid model slicing processing method
  • Non-popular grid model slicing processing method
  • Non-popular grid model slicing processing method

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Experimental program
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Embodiment

[0058] Such as figure 1 For the non-popular triangular mesh model shown, using the commercial slicing software Cura to slice the model will result in the following figure 2 The profile fracture phenomenon shown. The method of the present invention is figure 1 The process of model slice contour construction is as follows: image 3 As shown, it specifically includes the following steps: firstly, the closedness detection of the model is performed, and then the intersection point is obtained by slice processing, and the intersection point in the single slice is formed into an undirected graph, and the connected subgraph is decomposed after deleting duplicate nodes and edges. Since there is only one node in the connected subgraph in the slice and its existence degree is greater than 2, the biconnected subgraph is decomposed to obtain five biconnected subgraphs. Among them, the degree of nodes in the first four biconnected subgraphs is 2, and the ordered closed contour path can ...

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Abstract

The invention relates to a non-popular mesh model slicing processing method, which comprises the following steps of: 1, reading a triangular mesh model, and carrying out closure detection on the model; 2, calculating intersection points of each layer of slices and the model, mapping the intersection points into a node set, mapping intersection line segments into an edge set, and establishing an undirected graph by utilizing the node set and the edge set; 3, performing repetitive detection on a node set and an edge set in the undirected graph; and 4, calculating connected sub-graphs of the undirected graph, and obtaining an ordered contour of each layer of slices based on a path planning method according to the distribution condition of node degrees in each connected sub-graph. According tothe arrangement rule of slice intersection points, the correct ordered slice contour is quickly obtained by using a powerful path planning method, complex mathematical calculation for repairing non-popular triangular slices is avoided, effectiveness and robustness of the whole slice algorithm are improved, and the invention is suitable for slice processing of various popular and non-popular gridmodels.

Description

technical field [0001] The invention relates to the technical field of rapid prototyping, in particular to a slice processing method of an unpopular grid model. Background technique [0002] The triangular mesh model is a three-dimensional geometric model that uses a large number of triangular faces to simulate the surface of complex objects. It is widely used in industrial design, medicine, film and television animation and other fields. When this kind of model is used for rapid prototyping, it is necessary to convert the 3D model into a series of 2D slice profiles. Existing slicing algorithms are mainly applied to popular closed mesh models, that is, the model is closed and has no self-intersection, no errors such as overlapping triangles or suspended surfaces. [0003] However, in practical applications, triangular mesh models constructed from equipment such as 3D scanners, CT, and MRI usually contain holes, suspended surfaces, and self-intersections. When the 3D model ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/20
CPCG06T17/20
Inventor 吴婷张礼兵
Owner JIAXING UNIV
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