scholarly journals A simplified algorithm for 3D mesh model considering the influence of edge features

2021 ◽  
Vol 2113 (1) ◽  
pp. 012084
Author(s):  
Rumeng Lv ◽  
Xiaobing Chen ◽  
Bingying Zhang
Keyword(s):  
3D Model ◽  
3D Models ◽  
Local Area ◽  
Mesh Simplification ◽  
Mesh Model ◽  
Traditional Algorithm ◽  
3D Mesh Model ◽  
Simplified Algorithm ◽  
Edge Features ◽  
Triangular Area

Abstract Aiming at the problem that most of the existing grid simplification algorithms for 3D models can not deal with a large number of boundary or non-popular grid models, this paper proposes a grid simplification algorithm for 3D models based on traditional algorithms. The algorithm mainly studies the geometric features of the model, considering the calculation methods and characteristics of edge shrinkage, and introduces the edge feature factors on the basis of the traditional algorithm, that is, the triangular area and side length factors of local area are introduced in the calculation of folding cost. In addition, the gaussian curvature characteristics of the 3D model are also included. Experimental results show that the proposed algorithm can keep the detail features of the mesh model well, and greatly reflect the quality and effect of mesh simplification after simplification.

3D Mesh Model Coding

2011 ◽  
pp. 95-123
Author(s):  
Zhen Li
Keyword(s):  
3D Models ◽  
Future Research ◽  
Mesh Compression ◽  
Compression Algorithms ◽  
3D Mesh ◽  
Mesh Model ◽  
Data Representations ◽  
3D Mesh Model ◽  
Basic Concepts ◽  
Mesh Models

Application of 3D mesh model coding is first presented in this chapter. We then survey the typical existing algorithms in the area of compression of static and dynamic 3D meshes. In an introductory sub-section we introduce basic concepts of 3D mesh models, including data representations, model formats, data acquisitions and 3D display technologies. Furthermore, we introduce several typical 3D mesh formats and give an overview to coding principles of mesh compression algorithms in general, followed by describing the quantitative measures for 3D mesh compression. Then we describe some typical and state-of-the-art algorithms in 3D mesh compression. Compression and streaming of gigantic 3D models are specially introduced. At last, the MPEG4 3D mesh model coding standard is briefed. We conclude this chapter with a discussion providing an overall picture of developments in the mesh coding area and pointing out directions for future research.

scholarly journals 3D Polygon Mesh Encryption Based on 3D Lorenz Chaotic Map

2021 ◽  
Vol 15 (15) ◽  
pp. 103
Author(s):  
Nashwan Alsalam Ali ◽  
Abdul Monem S. Rahma ◽  
Shaimaa H. Shaker
Keyword(s):  
Hausdorff Distance ◽  
3D Model ◽  
Chaotic Map ◽  
3D Models ◽  
Experimental Results ◽  
The Internet ◽  
Mesh Model ◽  
Polygon Mesh ◽  
Matching Degree ◽  
Excellent Property

<p class="0abstract">The multimedia application developments in recent years lead to the widespread of 3D model applications. It becomes more popular in various fields as well as exchanging it over the internet. The security of the 3D models is a very important issue now a day, so the scheme for encrypting the 3D model will be proposed in this work. In this proposed scheme, the 3D polygon mesh model will be protected through the encrypting process based on a 3D Lorenz Chaotic map where the vertices value of the 3D polygon mesh model will be modified using 3D keys generated by 3D Lorenz Chaotic Map, which has excellent property and provides a good diffusion. The proposed scheme was implemented on various 3D models, which have a different number of vertices and faces. The experimental results show that the proposed scheme has good encryption results, which were noted through completely deforming and changing the whole shape of the 3D models. The Hausdorff Distance (HD) and histogram metrics are adopted to calculate the matching degree between the original and extracted model. The results show that the original and extracted model are identical through the values of HD, where they are approximately zero, and the histogram visually is identical.    </p>

scholarly journals Direct construction of a four-dimensional mesh model from a three-dimensional object with continuous rigid body movement

2014 ◽  
Vol 1 (2) ◽  
pp. 96-102 ◽  
Author(s):  
Ikuru Otomo ◽  
Masahiko Onosato ◽  
Fumiki Tanaka
Keyword(s):  
Rigid Body ◽  
Body Movement ◽  
Computing Time ◽  
Three Dimensional ◽  
3D Models ◽  
Direct Construction ◽  
3D Mesh ◽  
Mesh Model ◽  
3D Mesh Model ◽  
Dimensional Object

Abstract In the field of design and manufacturing, there are many problems with managing dynamic states of three-dimensional (3D) objects. In order to solve these problems, the four-dimensional (4D) mesh model and its modeling system have been proposed. The 4D mesh model is defined as a 4D object model that is bounded by tetrahedral cells, and can represent spatio-temporal changes of a 3D object continuously. The 4D mesh model helps to solve dynamic problems of 3D models as geometric problems. However, the construction of the 4D mesh model is limited on the time-series 3D voxel data based method. This method is memory-hogging and requires much computing time. In this research, we propose a new method of constructing the 4D mesh model that derives from the 3D mesh model with continuous rigid body movement. This method is realized by making a swept shape of a 3D mesh model in the fourth dimension and its tetrahe-dralization. Here, the rigid body movement is a screwed movement, which is a combination of translational and rotational movement.

Analysis and Simulation on SVD-Based 3D Mesh Digital Watermark Algorithm

2013 ◽  
Vol 846-847 ◽  
pp. 1052-1055
Author(s):  
Yun Zhu
Keyword(s):  
Digital Watermark ◽  
Singular Value ◽  
3D Mesh ◽  
Mesh Model ◽  
Traditional Algorithm ◽  
The Matrix ◽  
3D Mesh Model ◽  
Value Decomposition ◽  
Watermark Algorithm ◽  
Mesh Models

The paper mainly discusses the digital watermark algorithm for 3D grid model. Traditional algorithm cannot coordinate the contradiction between invisibility and robustness of digital watermark. In order to improve the security, this paper proposes a 3D grid digital watermark algorithm based on singular value decomposition (SVD). Firstly, we set the matrix formed by distance from the vertexes to center of 3D mesh model as the vertex modulus matrix. Then the matrix is decomposed by SVD, and finally the watermark is embedded into the diagonal matrix to get the 3D mesh model containing watermark signal. The simulation results show that the algorithm effectively solves the problem of invisibility and robustness of watermark, and the watermark formed here can resist various attacks which enforce the protection of 3D mesh models Rights.

3D Watermarking Approach Using Particle Swarm Optimization Algorithm

2017 ◽  
pp. 582-613
Author(s):  
Mona M. Soliman ◽  
Aboul Ella Hassanien
Keyword(s):  
Particle Swarm Optimization ◽  
Particle Swarm ◽  
3D Models ◽  
Optimization Techniques ◽  
Experimental Results ◽  
Swarm Optimization ◽  
3D Mesh ◽  
Mesh Model ◽  
3D Mesh Model ◽  
3D Watermarking

This work proposes a watermarking approach by utilizing the use of Bio-Inspired techniques such as swarm intelligent in optimizing watermarking algorithms for 3D models. In this proposed work we present an approach of 3D mesh model watermarking by introducing a new robust 3D mesh watermarking authentication methods by ensuring a minimal surface distortion at the same time ensuring a high robustness of extracted watermark. In order to achieve these requirements this work proposes the use of Particle Swarm Optimization (PSO) as Bio-Inspired optimization techniques. The experiments were executed using different sets of 3D models. In all experimental results we consider two important factors: imperceptibility and robustness. The experimental results show that the proposed approach yields a watermarked object with good visual definition; at the same time, the embedded watermark was robust against a wide variety of common attacks.

scholarly journals EXPLORATORY STUDY OF 3D POINT CLOUD TRIANGULATION FOR SMART CITY MODELLING AND VISUALIZATION

2020 ◽  
Vol XLIV-4/W3-2020 ◽  
pp. 71-79
Author(s):  
S. A. M. Ariff ◽  
S. Azri ◽  
U. Ujang ◽  
A. A. M. Nasir ◽  
N. Ahmad Fuad ◽  
...  
Keyword(s):  
Point Cloud ◽  
Large Scale ◽  
3D Model ◽  
Large Data ◽  
3D Point Cloud ◽  
3D Mesh ◽  
Mesh Model ◽  
3D Data ◽  
3D Mesh Model ◽  
Hardware Specification

Abstract. The current trends of 3D scanning technologies allow us to acquire accurate 3D data of large-scale environment efficiently. The 3D data of large-scale environments is essential when generating 3D model is for the visualization of smart cities. For the seamless visualization of 3D model, large data size will be used during the 3D data acquisition. However, the processing time for large data size is time consuming and requires suitable hardware specification. In this study, different hardware capability in processing large data of 3D point cloud for mesh generation is investigated. Light Detection and Ranging (LiDAR) Airborne and Mobile Mapping System (MMS) are used as data input and processed using Bentley ContextCapture software. The study is conducted in Malaysia, specifically in Wilayah Persekutuan Kuala Lumpur and Selangor with the size of 49 km2. Several analyses have been performed to analyse the software and hardware specification based on the 3D mesh model generated. From the finding, we have suggested the most suitable hardware specification for 3D mesh model generation.

A Modified Generating Algorithm of Progressive Mesh Model Based on the Importance Degree of Vertex

2014 ◽  
Vol 1030-1032 ◽  
pp. 1623-1626
Author(s):  
Hou Bao Ming ◽  
Liu Xue Na
Keyword(s):  
3D Model ◽  
Data File ◽  
Mesh Simplification ◽  
Progressive Mesh ◽  
Plane Normal ◽  
Mesh Model ◽  
Degree Of Vertex ◽  
Contour Information ◽  
Error Metric ◽  
Computing Method

In order to implement progressive mesh representation of 3D model, improve the computing method of collapse cost in mesh simplification. Firstly, obtains model data from smf data file, and rapidly establishes the 3D model in the memory, and redesigns weight computing method of Garland QEM algorithm. Using the square of the largest deviation of triangular plane normal adjacent to the vertex as the importance degree of vertex, and brings it into error metric formula, progressive mesh is generated by simplifying. The following experiment shows that the algorithm is succinct, and the generating speed of mesh and the contour information of model are well preserved.

Robust 3D mesh model hashing based on feature object

2012 ◽  
Vol 22 (5) ◽  
pp. 744-759 ◽  
Author(s):  
Suk-Hwan Lee ◽  
Ki-Ryong Kwon
Keyword(s):  
3D Mesh ◽  
Mesh Model ◽  
3D Mesh Model

Geometric simulation for warp-knitted tubular bandages with the mesh model

2021 ◽  
pp. 004051752110138
Author(s):  
Haisang Liu ◽  
Gaoming Jiang ◽  
Zhijia Dong
Keyword(s):  
Programming Languages ◽  
Three Dimensional ◽  
3D Mesh ◽  
Mesh Model ◽  
Matrix Operations ◽  
Computer Aided ◽  
Spatial Geometry ◽  
3D Mesh Model ◽  
Coordinate Mapping ◽  
Geometric Simulation

The purpose of this paper is to geometrically simulate warp-knitted medical tubular bandages with a computer-aided simulator. A flat mesh model is established according to unfolded fabric considering the knitting characteristics of double-needle bed warp-knitted tubular fabrics. Moreover, a 3D (three-dimensional) mesh model corresponding to the actual product shape is created. To better describe the spatial geometry of stitches, eight-point models are introduced, and stitches are generated with the flat mesh model. Founded on matrix operations, the stitch position in the 3D mesh model is determined through coordinate mapping. Various stitch paths are rendered in computer programming languages C# and JavaScript to conduct simulations. Warp-knitted medical tubular bandages with a large number of shapes are effectively modeled.

Normal vector compression of 3D mesh model based on clustering and relative indexing

2004 ◽  
Vol 20 (8) ◽  
pp. 1241-1250
Author(s):  
Deok-Soo Kim ◽  
Youngsong Cho ◽  
Hyun Kim
Keyword(s):  
Normal Vector ◽  
3D Mesh ◽  
Model Based ◽  
Mesh Model ◽  
3D Mesh Model
Sign in / Sign up

Export Citation Format

Share Document