USING GEOMETRIC MODELING FOR FEATURE RECOGNITION IN ARCHAEOLOGICAL VESSELS DEZHI LIU FEATURE GROUP PRISM/ASU 3DK – 3DK – September 15, 2000

USING GEOMETRIC MODELING FOR FEATURE RECOGNITION IN ARCHAEOLOGICAL VESSELS 1. Geometric Modeling for Archaeological Vessels 2. Features of Archaeological Vessels 3. Feature Recognition 4. Output Analysis Result as XML Files 5. Some Results and Further Work

3DK – 3DK – September 15, Geometric Models for Archaeological Vessels 1.1 3D Geometric Models for Archaeological Vessels 1.2 2D Geometric Models for Archaeological Vessels

3DK – 3DK – September 15, D Geometric Models  Polygon Meshes M = (V, E, F) Where V: Vertex Set, E: Edge Set, F: Face Set

3DK – 3DK – September 15, D Geometric Models (Continue)  NURB Surfaces

3DK – 3DK – September 15, D Geometric Models  Chain Codes  NURB Curves

3DK – 3DK – September 15, Features of Archaeological Vessels 2.1 Feature Points 2.2 Contour Types 2.3 Features in Common for Vessels 2.4 Classification of Base

3DK – 3DK – September 15, Feature Points

3DK – 3DK – September 15, Feature Points (continue)

3DK – 3DK – September 15, Contour Types Simple

3DK – 3DK – September 15, Contour Types (continue) Composite

3DK – 3DK – September 15, Contour Types (continue) Inflected

3DK – 3DK – September 15, Contour Types (continue) Complex

3DK – 3DK – September 15, Features in Common for Vessels

3DK – 3DK – September 15, Classification of Base Base Point b. Flat base with zero curvature c. Concave base Base curve (Line Segment) Base curve a. Convex base

3DK – 3DK – September 15, Feature Recognition 3.1 Based on Curvature Analysis 3.2 Based on Angle Change 3.2 Based on Wavelet

3DK – 3DK – September 15, Curvature Analysis  Inflection Points (IPs) A point P will be a IP, if P satisfies К(t) = 0

3DK – 3DK – September 15, Angle Change  Corner Points (CPs) A point P will be a CP, if the angle changes sharply at P  End Points (EPs)

3DK – 3DK – September 15, Wavelet Please refer to Dasu’s presentation

3DK – 3DK – September 15, Output Analysis Result as XML Files  XML Schema  Binary Data Embedding

3DK – 3DK – September 15, Some Result and Further Work

3DK – 3DK – September 15, Some Result and Further Work (continue)

3DK – 3DK – September 15, Some Result and Further Work (continue)

3DK – 3DK – September 15, Some Result and Further Work (continue)

3DK – 3DK – September 15, Some Result and Further Work (continue)

3DK – 3DK – September 15, Some Result and Further Work (continue)