title: Edge-based identification of DP-features on free-form solids.
abstract: Numerous applications in mechanical CAD/CAM need robust algorithms for the identification of protrusion and depression features (DP-features) on geometric models with free-form (B-Spline) surfaces. This paper reports a partitioning algorithm that first identifies the boundary edges of DP-features and then creates a surface patch to cover the depressions or isolate the protrusions. The novelty of the method lies in the use of tangent continuity between edge segments to identify DP-feature boundaries that cross multiple faces and geometries.
authors.affiliation: Scottish Manufacturing Institute, Heriot-Watt University, Department of Mechanical Engineering, Riccarton, Edinburgh, Scotland EH14 4AS. t.lim@hw.ac.uk
authors.forename: T
authors.initials: T
authors.lastname: Lim
authors.forename: H
authors.initials: H
authors.lastname: Medellin
authors.forename: C
authors.initials: C
authors.lastname: Torres-Sanchez
authors.forename: J R
authors.initials: JR
authors.lastname: Corney
authors.forename: J M
authors.initials: JM
authors.lastname: Ritchie
authors.forename: J B C
authors.initials: JB
authors.lastname: Davies
mesh_terms: D000465:Algorithms; D001185:Artificial Intelligence; D017076:Computer-Aided Design; D004867:Equipment Design / Q000379:methods; D007089:Image Enhancement / Q000379:methods; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D016247:Information Storage and Retrieval / Q000379:methods*; D010363:Pattern Recognition, Automated / Q000379:methods*