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A method for extracting a multi-prime interface based on dot-collective elements

An extraction method and interface technology, which is applied in the field of multi-substance interface extraction, can solve problems such as inability to accurately find boundary surfaces, noise sensitivity, and small amount of media

Active Publication Date: 2019-01-08
XIAN UNIV OF TECH
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Problems solved by technology

[0014] The purpose of the present invention is to provide a multi-mass interface extraction method based on point collective voxels, which solves the problems that the existing multi-mass interface extraction method is suitable for a small number of media, is sensitive to noise, and cannot accurately find the boundary surface.

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  • A method for extracting a multi-prime interface based on dot-collective elements
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  • A method for extracting a multi-prime interface based on dot-collective elements

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[0081] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0082] A method for extracting multi-substance interfaces based on point collective voxels in the present invention, such as figure 1 shown, including the following steps:

[0083] Step 1. Obtain the point cloud data of the image, and perform Gaussian filtering to remove noise points.

[0084] The idea of ​​Gaussian filter denoising is a process of weighted average of each pixel of the entire image, and the value of each pixel is obtained by weighted average of itself and the pixel values ​​in its neighborhood. The specific implementation process is to use a template to scan each pixel in the image, and replace the gray value of the central pixel of the template with the weighted average gray value of the pixels in the neighborhood determined by the template. Specifically:

[0085] Step 1.1, in image processing, Gaussian filtering has a de...

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Abstract

The invention discloses a method for extracting a multi-prime interface based on point collective elements, which comprises the following steps: step 1, acquiring point cloud data of an image, and carrying out Gaussian filter denoising; step 2, converting a point set based on a spherical neighborhood, and highlighting a demarcation point; step 3, calculating the minimum circumscribed ball parameter, obtaining the minimum circumscribed ball point set, and utilizing the spherical point to shrink to obtain a single interface; step 4, calculating the minimum circumferential ball parameters again,obtaining the minimum circumferential ball point set, and dividing the multi-partition interfaces by utilizing the spherical point shrinkage sequence. A Gaussian filter is used for denoise in that multi-quality interface extraction method of the invention, so the correctness of the model in the processing process is ensured and the influence of the noise point is reduced. Through the weighted boundary point highlighting method, the purpose of reasonable use of neighborhood information is better ensured, the boundary point is accurately demarcated, the problem of unclear interface caused by neighborhood influence is solved, and the veracity of boundary point judgment is better ensured in the model processing.

Description

technical field [0001] The invention belongs to the technical field of multi-substance interface extraction methods, and in particular relates to a multi-substance interface extraction method based on point collective voxels. Background technique [0002] Traditional isosurface extraction techniques are suitable for the visualization of scalar fields. However, in real life, almost all objects are composed of two or more materials. It is difficult for isosurface extraction methods to support objects containing more than two materials. Therefore, extracting the interface of multi-material objects has become the focus of current research work. The technology of extracting multi-mass interfaces not only occupies a very important position in the fields of visualization technology and reverse engineering, but also has a wide range of applications in the fields of medicine, geological exploration, and meteorology. [0003] Each part inside an object can be represented by its outer...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T15/00
CPCG06T15/005
Inventor 宁小娟巨晨阳王怡轩王映辉
Owner XIAN UNIV OF TECH
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