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Related Experiment Videos

Edge-based identification of DP-features on free-form solids.

T Lim¹, H Medellin, C Torres-Sanchez

¹Scottish Manufacturing Institute, Heriot-Watt University, Department of Mechanical Engineering, Riccarton, Edinburgh, Scotland EH14 4AS. t.lim@hw.ac.uk

IEEE Transactions on Pattern Analysis and Machine Intelligence

|June 10, 2005

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This study introduces a new algorithm for identifying protrusion and depression features (DP-features) on complex B-Spline surfaces. The method effectively partitions geometric models by analyzing tangent continuity for robust feature boundary detection.

Area of Science:

Computer-Aided Design (CAD)
Geometric Modeling
Computational Geometry

Background:

Mechanical CAD/CAM applications require precise identification of geometric features.
Existing algorithms struggle with free-form surfaces and complex feature boundaries.
Robust detection of protrusion and depression features (DP-features) is crucial for design and manufacturing.

Purpose of the Study:

To develop a novel partitioning algorithm for identifying DP-features on B-Spline surfaces.
To enhance the accuracy and robustness of feature recognition in geometric modeling.
To address the challenge of DP-feature boundaries spanning multiple faces and geometries.

Main Methods:

The algorithm partitions geometric models by first identifying boundary edges of DP-features.

Related Experiment Videos

It utilizes tangent continuity between edge segments to define feature boundaries.

A surface patch is generated to cover depressions or isolate protrusions.

Main Results:

Successfully identifies boundary edges of DP-features on free-form surfaces.
Demonstrates robustness in detecting feature boundaries across multiple faces.
Enables accurate isolation of protrusions and covering of depressions.

Conclusions:

The proposed partitioning algorithm offers a robust solution for DP-feature identification in CAD/CAM.
The use of tangent continuity is a key innovation for handling complex feature boundaries.
This method improves the reliability of geometric model analysis for mechanical applications.