USING GEOMETRIC MODELING FOR FEATURE RECOGNITION IN ARCHAEOLOGICAL VESSELS

DEZHI LIU

FEATURE GROUP

PRISM/ASU

3DK3DK – – September 15, 2000

3DK3DK – – 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

3DK3DK – – September 15, 2000

1. Geometric Models for Archaeological Vessels

1.1 3D Geometric Models for Archaeological Vessels

1.2 2D Geometric Models for Archaeological Vessels

3DK3DK – – September 15, 2000

1.1 3D Geometric Models

Polygon Meshes

M = (V, E, F)Where V: Vertex Set, E: Edge Set, F: Face Set

3DK3DK – – September 15, 2000

1.1 3D Geometric Models (Continue)

NURB Surfaces

3DK3DK – – September 15, 2000

1.2 2D Geometric Models

Chain Codes

NURB Curves

3DK3DK – – September 15, 2000

2 Features of Archaeological Vessels

2.1 Feature Points

2.2 Contour Types

2.3 Features in Common for Vessels

2.4 Classification of Base

3DK3DK – – September 15, 2000

2.1 Feature Points

3DK3DK – – September 15, 2000

2.1 Feature Points (continue)

3DK3DK – – September 15, 2000

2.2 Contour Types

Simple

3DK3DK – – September 15, 2000

2.2 Contour Types (continue)

Composite

3DK3DK – – September 15, 2000

2.2 Contour Types (continue)

Inflected

3DK3DK – – September 15, 2000

2.2 Contour Types (continue)

Complex

3DK3DK – – September 15, 2000

2.3 Features in Common for Vessels

3DK3DK – – September 15, 2000

2.4 Classification of Base

Base Point

b. Flat base with zero curvature c. Concave base

Base curve (Line Segment)Base curve

a. Convex base

3DK3DK – – September 15, 2000

3 Feature Recognition

3.1 Based on Curvature Analysis

3.2 Based on Angle Change

3.2 Based on Wavelet

3DK3DK – – September 15, 2000

3.1 Curvature Analysis

Inflection Points (IPs)

A point P will be a IP, if P satisfies

К(t) = 0

3DK3DK – – September 15, 2000

3.2 Angle Change

Corner Points (CPs)A point P will be a CP, if the angle changes

sharply at P

End Points (EPs)

3DK3DK – – September 15, 2000

3.3 Wavelet

Please refer to Dasu’s presentation

3DK3DK – – September 15, 2000

4 Output Analysis Result as XML Files

XML Schema

Binary Data Embedding

3DK3DK – – September 15, 2000

5 Some Result and Further Work

3DK3DK – – September 15, 2000

5 Some Result and Further Work (continue)

3DK3DK – – September 15, 2000

5 Some Result and Further Work (continue)

3DK3DK – – September 15, 2000

5 Some Result and Further Work (continue)

3DK3DK – – September 15, 2000

5 Some Result and Further Work (continue)

3DK3DK – – September 15, 2000

5 Some Result and Further Work (continue)