Texture-based interactive mesh model cutting method and device and modeling device

A grid model and interactive technology, applied in the field of 3D modeling, can solve the problems of high operational precision, complex manual interaction process, low accuracy of edge matching of reconstructed objects, etc., to achieve precise cutting, surface mesh The effect of accurate grid edge and high processing precision

Active Publication Date: 2018-12-14
浙江景致数据技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Use 3D editing software such as 3dMax to filter and delete meshes. The manual interaction process is very complicated. It is necessary to consider not only the adjacency relationship of the meshes, but also the occlusion relationship. Especially when splitting the edge triangles, the operation fineness is high. , and the edge matching accuracy of the reconstructed object is low, which affects the reconstruction accuracy of the final object model

Method used

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  • Texture-based interactive mesh model cutting method and device and modeling device
  • Texture-based interactive mesh model cutting method and device and modeling device
  • Texture-based interactive mesh model cutting method and device and modeling device

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Embodiment 1

[0056] Example as figure 1 As shown, a texture-based interactive mesh model cutting method of one embodiment includes the following steps:

[0057] S100. According to the corresponding relationship between the surface mesh and the texture image of the reconstructed 3D model of the object, project the mesh triangles in the surface mesh onto the texture image to obtain a texture triangle set composed of texture triangles in the texture image.

[0058] When three-dimensional modeling of an object is carried out through an image, the three-dimensional surface mesh corresponding to the object and showing the surface characteristics of the object is composed of a huge number of triangles, and the surface mesh has a mapping relationship with the texture image. That is to say, the reconstructed 3D model refers to a model that has completed texture mapping, that is, both surface grid data and model texture images, as well as the mapping relationship between surface grids and texture im...

Embodiment 2

[0090] The following describes the texture-based interactive mesh model cutting method with a specific processing flow.

[0091] Step 1: Through the mapping relationship P between the grid T and the texture M, project the triangles in the surface grid T on the texture image M, record the set of projected triangles as Tp, such as Figure 5 shown.

[0092] Step 2: Through interaction on the texture image M, a polygonal region R containing only the background is selected along the edge of the foreground.

[0093] Step 3: Traverse T p For each triangle in , judge the triangle that falls completely within the polygon R, denoted as Set in T with The corresponding set of triangles is denoted as T i , delete T in T i .

[0094] Step 4:

[0095] for T p The triangle intersecting the edge of R in , set T c ={a 0 , a 1 , a 2}, where a 0 , a 1 , a 2 is the triangle T c The three vertices in counterclockwise order. Let T c The corresponding triangle in T is T' c ={a' ...

Embodiment 3

[0116] Based on the same inventive concept, an embodiment of the present invention provides a texture-based interactive mesh model cutting device. Since the problem-solving principle of this device is similar to the aforementioned texture-based interactive mesh model cutting method, therefore, The implementation of the system can be realized according to the specific steps of the aforementioned method, and the repetition will not be repeated.

[0117] The texture-based interactive grid model cutting device of this embodiment includes: a grid projection module, a background separation module, a triangle screening module, a first surface mesh processing module, and a second surface mesh Grid processing module and new surface mesh generation module. Wherein, the grid projection module is configured to project the grid triangles in the surface grid onto the texture image according to the correspondence between the surface grid and the texture image of the reconstructed 3D model of...

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Abstract

The invention discloses a texture-based interactive mesh model cutting method and device and modeling device. The method comprises the following steps: according to the correspondence between the surface mesh of the reconstructed object three-dimensional model and the texture image, projecting the mesh triangle in the surface mesh onto the texture image to obtain the texture triangle set formed bythe texture triangle in the texture image; selecting a polygon region containing only the background on the projected texture image; traversing all the texture triangles in the set of texture triangles, and filtering out the texture triangles that fall in the polygon region and intersect with the edges of the polygon region; removing a mesh triangle corresponding to a texture triangle falling ina polygon region; splitting a texture triangle intersecting with the edge of the polygon region and a corresponding surface mesh triangle, and deleting the splitting triangle in the surface mesh corresponding to the texture triangle falling in the polygon region; building a new surface mesh of a newly-built object three-dimensional model.

Description

technical field [0001] The invention relates to the technical field of three-dimensional modeling, in particular to a texture-based interactive grid model cutting method and device, and a three-dimensional modeling method and device. Background technique [0002] At present, image-based 3D reconstruction generally needs to complete mesh surface reconstruction and texture mapping based on point cloud after camera calibration and point cloud generation. However, due to the fact that the edge of the reconstructed point cloud is often attached to some external points, coupled with some problems in the mesh surface reconstruction algorithm itself, for objects with open surface structures such as clothes, the reconstructed surface will extend outward when it is close to the edge of the object. The redundant grid is reconstructed, and after the texture mapping, the background is mapped to the redundant generated grid, so that the reconstruction result has a mixed situation of foreg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/30
CPCG06T17/30
Inventor 史利民谢一凡郭复胜王万请刘薇
Owner 浙江景致数据技术有限公司
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