Affine-invariant curve normalization for object shape representation, classification, and retrieval

2001 ◽  
Vol 13 (2) ◽  
pp. 80-94 ◽  
Author(s):  
Yannis Avrithis ◽  
Yiannis Xirouhakis ◽  
Stefanos Kollias
Keyword(s):  
Shape Representation ◽  
Invariant Curve ◽  
Affine Invariant ◽  
Object Shape

scholarly journals A Comparative Analysis of the Zernike Moments for Single Object Retrieval

2019 ◽  
Vol 16 (2(SI)) ◽  
pp. 0504 ◽  
Author(s):  
Abu Bakar Et al.
Keyword(s):  
Image Retrieval ◽  
Shape Representation ◽  
Outer Boundary ◽  
Zernike Moments ◽  
Zernike Moment ◽  
Experimental Investigations ◽  
Object Image ◽  
Single Object ◽  
Object Retrieval ◽  
Object Shape

Zernike Moments has been popularly used in many shape-based image retrieval studies due to its powerful shape representation. However its strength and weaknesses have not been clearly highlighted in the previous studies. Thus, its powerful shape representation could not be fully utilized. In this paper, a method to fully capture the shape representation properties of Zernike Moments is implemented and tested on a single object for binary and grey level images. The proposed method works by determining the boundary of the shape object and then resizing the object shape to the boundary of the image. Three case studies were made. Case 1 is the Zernike Moments implementation on the original shape object image. In Case 2, the centroid of the shape object image in Case 1 is relocated to the center of the image. In Case 3, the proposed method first detect the outer boundary of the shape object and then resizing the object to the boundary of the image. Experimental investigations were made by using two benchmark shape image datasets showed that the proposed method in Case 3 had demonstrated to provide the most superior image retrieval performances as compared to both the Case 1 and Case 2. As a conlusion, to fully capture the powerful shape representation properties of the Zernike moment, a shape object should be resized to the boundary of the image.

Object shape representation via skeletal models (s-reps) and statistical analysis

2020 ◽  
pp. 233-271
Author(s):  
Stephen M. Pizer ◽  
Junpyo Hong ◽  
Jared Vicory ◽  
Zhiyuan Liu ◽  
J.S. Marron ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Shape Representation ◽  
Object Shape

A View-Based 3D Object Shape Representation Technique

2007 ◽  
pp. 411-422 ◽  
Author(s):  
Yasser Ebrahim ◽  
Maher Ahmed ◽  
Siu-Cheung Chau ◽  
Wegdan Abdelsalam
Keyword(s):  
Shape Representation ◽  
Object Shape ◽  
3D Object ◽  
Representation Technique
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