Viewpoint-invariant Fourier descriptors for 3D planar shape representation

1996 ◽  
Vol 32 (19) ◽  
pp. 1775 ◽  
Author(s):  
S.K.W. Kwok ◽  
J.C.H. Poon
Keyword(s):  
Shape Representation ◽  
Fourier Descriptors ◽  
Planar Shape

AN INVARIANT SHAPE REPRESENTATION: INTERIOR ANGLE CHAIN

2007 ◽  
Vol 21 (03) ◽  
pp. 543-559 ◽  
Author(s):  
BIN WANG ◽  
YAN QIU CHEN
Keyword(s):  
Synthetic Aperture Radar ◽  
Shape Representation ◽  
Interior Angle ◽  
Synthetic Aperture ◽  
Radar Images ◽  
Planar Shape ◽  
The Difference ◽  
Representation Scheme ◽  
Invariant Shape ◽  
Aperture Radar

This paper proposes a novel shape representation scheme — Interior Angle Chain (IAC) — which is invariant to translation, rotation and scaling. The proposed method first approximates the contour of a planar shape with an equilateral polygon and then makes a representation using the polygon's interior angle chain. The difference between two shapes is measured by the distance between their IAC's. An algorithm to obtain equilateral polygon approximation and its associated IAC is proposed in this paper. The proposed shape representation scheme has been tested on two benchmarks and applied to lake recognition in SAR (Synthetic Aperture Radar) images. The results show that IAC is an effective shape representation scheme.

Non-parametric planar shape representation based on adaptive curvature functions

2002 ◽  
Vol 35 (1) ◽  
pp. 43-53 ◽  
Author(s):  
C. Urdiales ◽  
A. Bandera ◽  
F. Sandoval
Keyword(s):  
Shape Representation ◽  
Planar Shape ◽  
Non Parametric
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