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IEICE TRANSACTIONS on Fundamentals

A Single Tooth Segmentation Using PCA-Stacked Gabor Filter and Active Contour

Pramual CHOORAT, Werapon CHIRACHARIT, Kosin CHAMNONGTHAI, Takao ONOYE

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Summary :

In tooth contour extraction there is insufficient intensity difference in x-ray images between the tooth and dental bone. This difference must be enhanced in order to improve the accuracy of tooth segmentation. This paper proposes a method to improve the intensity between the tooth and dental bone. This method consists of an estimation of tooth orientation (intensity projection, smoothing filter, and peak detection) and PCA-Stacked Gabor with ellipse Gabor banks. Tooth orientation estimation is performed to determine the angle of a single oriented tooth. PCA-Stacked Gabor with ellipse Gabor banks is then used, in particular to enhance the border between the tooth and dental bone. Finally, active contour extraction is performed in order to determine tooth contour. In the experiment, in comparison with the conventional active contour without edge (ACWE) method, the average mean square error (MSE) values of extracted tooth contour points are reduced from 26.93% and 16.02% to 19.07% and 13.42% for tooth x-ray type I and type H images, respectively.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E96-A No.11 pp.2169-2178
Publication Date
2013/11/01
Publicized
Online ISSN
1745-1337
DOI
10.1587/transfun.E96.A.2169
Type of Manuscript
Special Section PAPER (Special Section on Smart Multimedia & Communication Systems)
Category
Image Processing

Authors

Pramual CHOORAT
  King Mongkut's University of Technology Thonburi
Werapon CHIRACHARIT
  King Mongkut's University of Technology Thonburi
Kosin CHAMNONGTHAI
  King Mongkut's University of Technology Thonburi
Takao ONOYE
  Osaka University

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