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Two-point grid model cutting method

A grid model and cutting technology, which is applied in 3D modeling, image data processing, instruments, etc., can solve the problems of slow calculation speed and poor generality, and achieve the increase of the number of grids, the reduction of complexity, and the improvement of cutting efficiency effect

Active Publication Date: 2018-04-27
深圳市一图智能科技有限公司
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Problems solved by technology

This method is greatly affected by the number of triangles to be cut, the calculation speed is slow, and it requires multiple complex parameter controls, and the general type is poor.

Method used

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Embodiment Construction

[0024] The present invention will be described in more detail below in conjunction with the accompanying drawings and embodiments.

[0025] The invention discloses a two-point grid model cutting method, please refer to figure 1 , which includes the following steps:

[0026] Step S1, 3D reconstruction of the acquired CT image data to obtain a 3D mesh model of the organ;

[0027] Step S2, generating adjacency information; wherein, the process of generating adjacency information includes: traversing all the triangles that make up the three-dimensional mesh model, and for each triangle face, obtaining the information of the adjacent triangle face that shares the same edge with the triangle face ;

[0028] Step S3, operate the mouse to click and drag the 3D mesh model, rotate and translate the 3D mesh model to a suitable cutting viewing angle, and operate the mouse to select two points on the part to be cut, so that the two points are on the target cutting surface , the two poin...

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Abstract

The invention discloses a two-point grid model cutting method. The method comprises steps that an organ three-dimensional grid model is constructed; a mouse is operated to select two points of to-be-cut partial points to generate an expression of a cutting surface; any point is selected, a triangle patch where the point is located is calculated and acquired as a seed triangle; in adjacent surfacesof the seed triangle, a triangle intersecting with the cutting surface is searched, the acquired triangle is taken as a new seed triangle until no new seed triangle generation position exists, and the triangle band grid is acquired; the triangle band grid is divided into two upper and lower sub-grids separated by the cutting surface, and edges generated by cutting are acquired; a set of polygonswhich do not communicate with each other is acquired; the three-dimensional grid model is divided into upper and lower parts according to a cut surface, and cut parts do not stick any more. The methodis advantaged in that improvement of the grid processing speed and improvement of computer auxiliary diagnosis efficiency are facilitated, and easy operation and accurate result are realized.

Description

technical field [0001] The invention relates to a three-dimensional grid model processing method in a computer medical aided diagnosis and treatment system and a medical image visualization system, in particular to a two-point grid model cutting method. Background technique [0002] With the continuous development of computer technology, computer-aided diagnosis (CAD) plays an increasingly important role in clinical practice. Doctors collect CT images of patients, segment organs and tissues of interest in the form of binary images through computer image processing technology, and then use graphics technology to perform 3D reconstruction to obtain 3D mesh models of organs and tissues. Compared with the traditional two-dimensional image diagnosis, with the help of three-dimensional models of diseased organs and tissues, doctors can observe and understand the patient's disease from multiple angles and in all directions, so as to diagnose and evaluate the patient's disease and c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T17/20
CPCG06T7/0012G06T17/20G06T2207/10081
Inventor 王浩宇叶建平
Owner 深圳市一图智能科技有限公司
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