USING GEOMETRIC MODELING FOR FEATURE RECOGNITION IN ARCHAEOLOGICAL VESSELS

USING GEOMETRIC MODELING FOR FEATURE RECOGNITION IN ARCHAEOLOGICAL VESSELS

DEZHI LIU

FEATURE GROUP

PRISM/ASU

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


1. Geometric Models for Archaeological Vessels

1.1 3D Geometric Models for Archaeological Vessels

1.2 2D Geometric Models for Archaeological Vessels


1.1 3D Geometric Models

Polygon Meshes

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


1.1 3D Geometric Models (Continue)

NURB Surfaces


1.2 2D Geometric Models

Chain Codes

NURB Curves


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


2.1 Feature Points


2.1 Feature Points (continue)


2.2 Contour Types

Simple


2.2 Contour Types (continue)

Composite



Inflected



Complex


2.3 Features in Common for Vessels


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


3 Feature Recognition

3.1 Based on Curvature Analysis

3.2 Based on Angle Change

3.2 Based on Wavelet


3.1 Curvature Analysis

Inflection Points (IPs)

A point P will be a IP, if P satisfies

К(t) = 0


3.2 Angle Change

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

sharply at P

End Points (EPs)


3.3 Wavelet

Please refer to Dasu’s presentation


4 Output Analysis Result as XML Files

XML Schema

Binary Data Embedding


5 Some Result and Further Work


5 Some Result and Further Work (continue)

USING GEOMETRIC MODELING FOR FEATURE RECOGNITION IN ARCHAEOLOGICAL VESSELS

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