Triangular grid filtering method based on tv and anisotropic laplacian regularization term
A triangular mesh and anisotropic technology, applied in instrumentation, computing, image data processing, etc., can solve the problems of performance dependence on the completeness of the training set, time-consuming, etc., to reduce the amount of calculation, remove noise, and improve algorithm efficiency Effect
Inactive Publication Date: 2020-05-22
CHINA UNIV OF GEOSCIENCES (WUHAN)
View PDF2 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
This type of method effectively eliminates noise by using the sparsity of a certain geometric quantity on the grid, but it will inevitably produce a staircase phenomenon in the nonlinear smooth surface area;
[0006] Data-driven methods can theoretically eliminate various types of noise and restore geometric features at different scales, but their performance depends on the completeness of the training set and is time-consuming
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0034] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.
[0035] Such as figure 1 As shown, this implementation example provides a triangular grid filtering method based on the TV model and anisotropic Laplacian operator, the method includes the following steps:
[0036] 1) Use the Computational Geometry Algorithm Library (CGAL) to obtain the vertices, edges, and faces of the triangular mesh model, which are represented as {v i :i=1,2,...,V}, {e i :i=1,2,…,E}, {τ i :i=1,2,...,T}, wherein V, E and T are respectively the number of vertices, edges and faces;
[0037] 2) Calculate and store a neighboring vertex and a neighboring face of each vertex, and a neighboring face of each face according to the topological relationship;
[0038] 3) Calculate the normal vector of each su...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a triangular mesh filtering method based on TV (Total Variation) and anisotropy Laplacian regular terms. The method comprises the following steps that: firstly puts forward avariation model which acts on a mesh surface normal vector domain, wherein the model comprises two regular terms including TV and anisotropy Laplacian, and the two regular terms not only can recover sharp features on the triangular mesh but also can favorably process a nonlinear smooth area; secondly, adopting an augmented Lagrange method to solve the variation model to obtain optimized face normal vector information; and finally, according to the optimized face normal vector, adopting a vertex update algorithm to quickly obtain the filtered triangular mesh model. Compared with the prior art,the algorithm has the following advantages that efficiency is high, the quality of the filtered triangular mesh can be obviously improved, meanwhile, the sharp geometric features are protected, the nonlinear smooth area is recovered, and an ideal filtering effect is achieved.
Description
technical field [0001] The invention relates to the technical field of computer graphics processing, in particular to a triangular grid filtering method based on a total variation (TV) model and an anisotropic Laplacian regular term. Background technique [0002] With the advancement of sensor technology, various scanning devices have been widely used in 3D reconstruction, VR / AR and other fields, and a large number of triangular mesh models have also been generated. However, the triangular mesh model will inevitably be polluted by noise during scanning and reconstruction. Since the noise not only reduces the visual quality of the model itself, but also affects the effect of subsequent mesh processing, it is necessary to filter the triangular mesh model both from the perspective of visualization and to facilitate further mesh processing. The key issue in triangular mesh filtering is to restore sharp features and nonlinear smooth regions to the greatest extent while removing ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/20
CPCG06T17/20
Inventor 刘郑钟赛尚谢忠刘金琴陈杨禹文豪
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)