Surface Reconstruction by Alpha Geometric Shape Based on Triangulation

2011 ◽  
Vol 480-481 ◽  
pp. 1536-1541
Author(s):  
Xue Ming He ◽  
Chen Liang Hua ◽  
Cheng Gang Li ◽  
Min Min Ni ◽  
Qing Hua Jin
Keyword(s):  
Data Structure ◽  
Computer Graphics ◽  
Reverse Engineering ◽  
Surface Reconstruction ◽  
Geometric Shape ◽  
Triangle Mesh ◽  
Section Line ◽  
Interactive Selection

Surface reconstruction by alpha geometric shape based on triangulation is a new idea and method in computer graphics and reverse engineering. In the process of Topology reconstruction, the points are reduced and projected to a middle slice plane. The adjacency among slices is established by section line subdivision, and triangle mesh is stored and called by the form of STL. The simplexes are classified and computed in order to obtain α interval by the external-ball radius and center of every simplex, and the data structure is designed to save them. Through the man-machine interactive selection modes, α-shape can be reconstructed by different α parameters. The surface reconstruction is completed.

Reconstruction of Sculptured Surface on Reverse Engineering

1997 ◽  
Author(s):  
Gou-Jen Wang ◽  
Chung-Chang Wang
Keyword(s):  
Data Structure ◽  
Reverse Engineering ◽  
Surface Reconstruction ◽  
Sparse Matrix ◽  
Computing Time ◽  
Cubic Spline ◽  
Surface Model ◽  
Two Dimensional ◽  
B Spline ◽  
Spline Curves

Abstract In this article, solutions for redundant measured data elimination and surface reconstruction on reverse engineering are presented. In redundant data elimination, we propose a simple algorithm that can efficiently discard those redundant measured points according to the required degree of accuracy. While in the surface reconstruction, we try first convert all eliminated column or row data into spline (B-Spline, Beizer and Cubic-Spline) curves. Methods for two dimensional spline (u, v directions) curve construction are described. Non-meshed two dimensional spline curves are then blended to a surface model by formatting data points into a sparse matrix data structure. Experimental results show that the proposed characteristic points extraction method can remarkably reduce the reconstruction time only on the cost of a little extracting time and minor modeling errors. Comparisons among B-spline, Beizer and Cubic-spline on data structure, computing time, and accuracy demonstrate that the B-spline algorithm is superior to other algorithms in surface reconstruction.

scholarly journals Graph-Based Construction of 3D Korean Giwa House Models

Buildings ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 68
Author(s):  
Mankyu Sung
Keyword(s):  
Data Structure ◽  
Computer Graphics ◽  
Real Time ◽  
Texture Image ◽  
Time Rate ◽  
Commercial Software ◽  
Spline Curve ◽  
High Level ◽  
Complicated Part ◽  
Different Parts

This paper proposes a graph-based algorithm for constructing 3D Korean traditional houses automatically using a computer graphics technique. In particular, we target designing the most popular traditional house type, a giwa house, whose roof is covered with a set of Korean traditional roof tiles called giwa. In our approach, we divided the whole design processes into two different parts. At a high level, we propose a special data structure called ‘modeling graphs’. A modeling graph consists of a set of nodes and edges. A node represents a particular component of the house and an edge represents the connection between two components with all associated parameters, including an offset vector between components. Users can easily add/ delete nodes and make them connect by an edge through a few mouse clicks. Once a modeling graph is built, then it is interpreted and rendered on a component-by-component basis by traversing nodes in a procedural way. At a low level, we came up with all the required parameters for constructing the components. Among all the components, the most beautiful but complicated part is the gently curved roof structures. In order to represent the sophisticated roof style, we introduce a spline curve-based modeling technique that is able to create curvy silhouettes of three different roof styles. In this process, rather than just applying a simple texture image onto the roof, which is widely used in commercial software, we actually laid out 3D giwa tiles on the roof seamlessly, which generated more realistic looks. Through many experiments, we verified that the proposed algorithm can model and render the giwa house at a real time rate.

Application Research on a Curved CAM Surface Reconstruction Method

2014 ◽  
Vol 971-973 ◽  
pp. 402-405
Author(s):  
Zhou Wen ◽  
Jun Ling Zhang ◽  
Xiu Duan Gong
Keyword(s):  
Reverse Engineering ◽  
Surface Reconstruction ◽  
Design Method ◽  
Subsequent Development ◽  
Reconstruction Method ◽  
Application Research ◽  
Cam Mechanism ◽  
Indexing Mechanism ◽  
Contour Surface ◽  
Rapid Modeling

Globular indexing CAM mechanism is a good indexing mechanism. As the working curve of CAM contour surface is no extending curved surface, there is certain difficulty to design processing. It is new kinds of design method that reverse engineering apply in rapid modeling of curved CAM. In this way, designer can complete curve of CAM reverse modeling, and the rationality of the model is verified. At the same time, it also can reverse modeling and the subsequent development of other products to provide a reference.

Surface Reconstruction: Roles in the Field of Computer Vision and Computer Graphics

2021 ◽  
pp. 2250008
Author(s):  
Soumi Dhar ◽  
Shyamosree Pal
Keyword(s):  
Computer Vision ◽  
Image Analysis ◽  
Computer Graphics ◽  
Surface Reconstruction ◽  
Related Problem ◽  
Data Modeling ◽  
Mathematical Foundation ◽  
Volume Data ◽  
3D Computer Vision ◽  
Real Objects

Surface Reconstruction is the most potent aspect of 3D computer vision. It allows recapturing or imitating of the shape of real objects. It also provides sufficient knowledge regarding the mathematical foundation for rendering applications which are widely used for analyzing medical volume data, modeling, 3D interior designing, architectural designing. In our paper, we have mentioned various algorithms and approaches for surface reconstruction and their applications. Moreover, we have tried to emphasize the necessity of surface reconstruction for solving image analysis related problem.

Implicit surface reconstruction for reverse engineering

1998 ◽  
Author(s):  
Y. He ◽  
Peihua Gu ◽  
K. Ferguson ◽  
J. Ronsky ◽  
R. Zernicke
Keyword(s):  
Reverse Engineering ◽  
Surface Reconstruction ◽  
Implicit Surface

Automatic CAD Model Reconstruction from Multiple Point Clouds for Reverse Engineering

2002 ◽  
Vol 2 (3) ◽  
pp. 160-170 ◽  
Author(s):  
Jianbing Huang ◽  
Chia-Hsiang Menq
Keyword(s):  
Reverse Engineering ◽  
Boundary Surface ◽  
Point Clouds ◽  
Geometric Feature ◽  
Multiple Point ◽  
Reconstruction Method ◽  
Cad Model ◽  
Model Reconstruction ◽  
Triangle Mesh ◽  
Novel Technologies

In this paper, a systematic scheme is proposed and novel technologies are developed to automatically reconstruct a CAD model from a set of point clouds scanned from the boundary surface of an existing object. The proposed scheme is composed of three major steps. In the first step, multiple input point clouds are incrementally integrated into a watertight triangle mesh to recover the object shape. In the second step, mesh segmentation is applied to the triangle mesh to extract individual geometric feature surfaces. Finally, the manifold topology describing the connectivity information between different geometric surfaces is automatically extracted and the mathematical description of each geometric feature is computed. The computed topology and geometry information represented in ACIS modeling kernel form a CAD model that may be used for various downstream applications. Compared with prior work, the proposed approach has the unique advantage that the processes of recognizing geometric features and of reconstructing CAD models are fully automated. Integrated with state of the art scanning devices, the developed model reconstruction method can be used to support reverse engineering of high precision mechanical components. It has potential applications to many engineering problems with a major impact on rapid design and prototyping, shape analysis, and virtual reality.

Individual Design of Mechanical and Electrical Products Based on Reverse Engineering

2014 ◽  
Vol 496-500 ◽  
pp. 2746-2750
Author(s):  
Zhi Qing Wu ◽  
Tie Jun Wu
Keyword(s):  
Reverse Engineering ◽  
Key Words ◽  
Surface Reconstruction ◽  
Design Method ◽  
Three Dimension ◽  
Customer Needs ◽  
Cloud Data ◽  
Electric Drill ◽  
Individual Design

This paper introduced a new design method for mechanical and electrical products,for example electric drill handle. By using Geomagic Studio Software, the cloud data about scanning electric drill was preprocessed, the three-dimension surface was reconfigured according to the preprocessed data, the surface reconstruction file was imported into UG Software for substantialization. Finally, the model was improved and optimized according to individual customer needs. Key words: Electric drill handle, Reverse engineering, Individual design

Reverse Engineering Design of Vehicle Rear Axle Based on CATIA

2014 ◽  
Vol 697 ◽  
pp. 298-301
Author(s):  
Yong Qing Xia ◽  
Jie Zhang
Keyword(s):  
Reverse Engineering ◽  
Engineering Design ◽  
Surface Reconstruction ◽  
Point Cloud ◽  
Rear Axle ◽  
Feasible Solution ◽  
Point Cloud Data ◽  
Engineering Technology ◽  
General Process ◽  
Cloud Data

Reverse engineering technology has been widely used in engineering design field. This paper proposed a CATIA-modeling-based reverse engineering technology for vehicle rear axle design. The general process for reverse engineering includes the pretreatment of the point cloud data, the establishment of the grid, the surface reconstruction of parts, the analysis of curved surface, and so on. Finally, the paper puted forward practical and feasible solution to the problem.

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