Interactive Feature Modeling for Reverse Engineering

2006 ◽  
Vol 6 (4) ◽  
pp. 422-424 ◽  
Author(s):  
K. Schreve ◽  
C. L. Goussard ◽  
A. H. Basson ◽  
D. Dimitrov
Keyword(s):  
Feature Extraction ◽  
Reverse Engineering ◽  
Feature Modeling ◽  
Free Form ◽  
Modeling Tools ◽  
Draft Angle ◽  
Feature Based ◽  
Nurbs Surfaces ◽  
Point Data ◽  
Interactive Feature

In feature based reverse engineering entities, or features, having higher level engineering meaning are used to approximate point data. This is in contrast to approximating the data with free form NURBS surfaces. Currently no such system is operationally available. Interactive feature based modeling tools for feature extraction, edge detection, and draft angle approximation are presented here. Several case studies demonstrate the application of these algorithms.

Automated segmentation of point data in a feature-based reverse engineering system

2002 ◽  
Vol 216 (3) ◽  
pp. 445-451 ◽  
Author(s):  
S Park ◽  
Y Jun
Keyword(s):  
Reverse Engineering ◽  
Region Growing ◽  
Engineering System ◽  
Robust Segmentation ◽  
Single Feature ◽  
Angle Deviation ◽  
Feature Based ◽  
Point Data ◽  
Artificial Neural Network Ann ◽  
Deviation Criterion

This paper proposes a novel methodology for robust segmentation of scanned point data that has been implemented in the feature-based reverse engineering system (FBRES). In the proposed method, firstly triangle meshes are generated from the input point data. The normal and the area of generated meshes are checked to find boundary meshes using the angle deviation criterion and the area criterion based upon a region-growing technique. Boundary meshes of each segmented region are connected into loops. Then, the meshes closed by each boundary loop are segmented into a single distinctive region. Finally, all segmented regions are mapped into a single feature using an artificial neural network (ANN) based feature recognizer. The FBRES is currently dedicated for reconstructing prismatic features such as a block, pocket, step, slot, hole and boss, which are very common and crucial in mechanical engineering products. The effectiveness of the proposed segmentation method is validated with experimental results.

Data Reduction Based on Bi-Directional Point Cloud Slicing for Reverse Engineering

2010 ◽  
Vol 437 ◽  
pp. 492-496 ◽  
Author(s):  
Lei Chen ◽  
Zhuang De Jiang ◽  
Bing Li ◽  
Jian Jun Ding ◽  
Fei Zhang
Keyword(s):  
Reverse Engineering ◽  
Data Reduction ◽  
Point Cloud ◽  
Free Form ◽  
Cad Model ◽  
Dense Point ◽  
Long Time ◽  
Point Data ◽  
Data Reduction Method ◽  
Method Point

In reverse engineering, complex free-form shaped parts are usually digitized quickly and accurately using the newly arisen non-contact measuring methods. However, they produce extremely dense point data at great rate. Not all the point data are necessary for generating a surface CAD model. Moreover, owing to inefficiencies in storing and manipulating them it takes a long time to generate a surface CAD model from the measured data. Therefore, an important task is to reduce the large amount of data. After analyzing the existing methods developed by other researchers, a new data reduction method, which based on bi-directional point cloud slicing, is presented in this paper. Using the proposed method, point cloud can be reduced while considering geometric features in both two parametric directions. Finally, a face model is used to verify the effectiveness of the proposed method and experimental results are given.

MULTIRESOLUTION SHAPE MODELING AND EDITING IN REVERSE ENGINEERING

2005 ◽  
Vol 05 (04) ◽  
pp. 765-787 ◽  
Author(s):  
YONG-JIN LIU ◽  
KAI TANG ◽  
AJAY JONEJA ◽  
MATTHEW MING-FAI YUEN
Keyword(s):  
Reverse Engineering ◽  
Piecewise Linear ◽  
Texture Mapping ◽  
Free Form ◽  
Maximum Efficiency ◽  
Shape Representations ◽  
Dense Point ◽  
Physical Prototype ◽  
Cad Models ◽  
Point Data

In this paper we propose a multiresolution framework in reverse engineering for complex free-form object modeling and editing. The proposed framework starts with dense point data scanned from the surface of a physical prototype and produces CAD models ready for downstream applications. Targeting on achieving maximum efficiency in the whole reverse engineering process, the proposed framework adopt a hierarchy of shape representations in a special order, i.e. implicit, piecewise linear and parametric surfaces. Based on the proposed hierarchical shape structure, a set of shape editing operators such as Boolean operators, blending, offset, morphing, free-form deformation and texture mapping, is efficiently integrated into the framework. A great diversity of free-form shape models with various modeling operations is presented to demonstrate the effectiveness and efficiency of the proposed multiresolution framework.

Integrating Freeform and Feature-Based Fitting Methods

2004 ◽  
Author(s):  
H. James de St. Germain ◽  
David E. Johnson ◽  
Elaine Cohen
Keyword(s):  
Reverse Engineering ◽  
Surface Fitting ◽  
General Purpose ◽  
Freeform Surface ◽  
Domain Expert ◽  
Coordinate Measurement ◽  
Reverse Engineer ◽  
Model Based ◽  
Cad Models ◽  
Feature Based

Reverse engineering (RE) is the process of defining and instantiating a model based on the measurements taken from an exemplar object. Traditional RE is costly, requiring extensive time from a domain expert using calipers and/or coordinate measurement machines to create new design drawings/CAD models. Increasingly RE is becoming more automated via the use of mechanized sensing devices and general purpose surface fitting software. This work demonstrates the ability to reverse-engineer parts by combining feature-based techniques with freeform surface fitting to produce more accurate and appropriate CAD models than previously possible.

An Interactive Graphical Approach to Feature Modeling Using Halfspaces and Geometric Constraints

1990 ◽  
Author(s):  
Maarten J. G. M. van Emmerik
Keyword(s):  
Spatial Relations ◽  
Feature Modeling ◽  
Geometric Constraints ◽  
Boolean Combination ◽  
Graphical Approach ◽  
Geometric Characteristics ◽  
Feature Based ◽  
New Feature ◽  
High Level ◽  
And Control

Abstract Feature modeling enables the specification of a model with standardized high-level shape aspects that have a functional meaning for design or manufacturing. In this paper an interactive graphical approach to feature-based modeling is presented. The user can represent features as new CSG primitives, specified as a Boolean combination of halfspaces. Constraints between halfspaces specify the geometric characteristics of a feature and control feature validity. Once a new feature is defined and stored in a library, it can be used in other objects and positioned, oriented and dimensioned by direct manipulation with a graphics cursor. Constraints between features prevent feature interference and specify spatial relations between features.

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