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Article Details

Copyright Statement: This is an open access article licensed under a Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, even commercially as long as the original work is properly cited.

Rotation-Invariant Neural Pattern Recognition System Using Extracted Descriptive Symmetrical Patterns

Author 1: YRehab F Abdel-Kader
Author 2: Rabab M. Ramadan
Author 3: Fayez W. Zaki
Author 4: Emad El-Sayed

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Digital Object Identifier (DOI) : 10.14569/IJACSA.2012.030524

Article Published in International Journal of Advanced Computer Science and Applications(IJACSA), Volume 3 Issue 5, 2012.

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Abstract: In this paper a novel rotation-invariant neural-based pattern recognition system is proposed. The system incorporates a new image preprocessing technique to extract rotation-invariant descriptive patterns from the shapes. The proposed system applies a three phase algorithm on the shape image to extract the rotation-invariant pattern. First, the orientation angle of the shape is calculated using a newly developed shape orientation technique. The technique is effective, computationally inexpensive and can be applied to shapes with several non-equally separated axes of symmetry. A simple method to calculate the average angle of the shape’s axes of symmetry is defined. In this technique, only the first moment of inertia is considered to reduce the computational cost. In the second phase, the image is rotated using a simple rotation technique to adapt its orientation angle to any specific reference angle. Finally in the third phase, the image preprocessor creates a symmetrical pattern about the axis with the calculated orientation angle and the perpendicular axis on it. Performing this operation in both the neural network training and application phases, ensures that the test rotated patterns will enter the network in the same position as in the training. Three different approaches were used to create the symmetrical patterns from the shapes. Experimental results indicate that the proposed approach is very effective and provide a recognition rate up to 99.5%.

Keywords: Rotation-Invariant;Pattern Recognition;Edge Detection;Shape Orientation;Image processing.

YRehab F Abdel-Kader, Rabab M. Ramadan, Fayez W. Zaki and Emad El-Sayed, “ Rotation-Invariant Neural Pattern Recognition System Using Extracted Descriptive Symmetrical Patterns” International Journal of Advanced Computer Science and Applications(IJACSA), 3(5), 2012. http://dx.doi.org/10.14569/IJACSA.2012.030524

@article{Abdel-Kader2012,
title = { Rotation-Invariant Neural Pattern Recognition System Using Extracted Descriptive Symmetrical Patterns},
journal = {International Journal of Advanced Computer Science and Applications},
doi = {10.14569/IJACSA.2012.030524},
url = {http://dx.doi.org/10.14569/IJACSA.2012.030524},
year = {2012},
publisher = {The Science and Information Organization},
volume = {3},
number = {5},
author = {YRehab F Abdel-Kader and Rabab M. Ramadan and Fayez W. Zaki and Emad El-Sayed}
}


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