Rank: 406 based on 167 downloads (last 30 days) and 3 files submitted
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George Azzopardi

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Company/University
University of Groningen

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Professional Interests:
Contour detection, computational model, simple cell

 

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24 Jun 2013 Screenshot Trainable COSFIRE filters for keypoint detection and pattern recognition A COSFIRE filter detects features or patterns of interest, e.g. traffic signs in complex scenes. Author: George Azzopardi feature detection, trainable, feature, detection, keypoint detection, cosfire 81 0
10 Jun 2013 Screenshot Contour detection by CORF operator The CORF contour operator is based on a computational model of a simple cell in visual cortex. Author: George Azzopardi edge detection, contour detection, visual cortex, simple cell, gabor, signal processing 44 0
21 Jan 2013 Screenshot Self-Organizing Map - Simple demonstration A simple and neat implementation of a self-organizing map algorithm Author: George Azzopardi vector quantization, selforganizing map, neural networks, som, prototypes, machine learning 42 5
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4.0 | 1 rating
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25 Jun 2013 Self-Organizing Map - Simple demonstration A simple and neat implementation of a self-organizing map algorithm Author: George Azzopardi

Could you write the Matlab command that you are using to call the SOMSImple function?

I suggest that you read the article called "Self-Organizing Map-Based Color Image Segmentation with k-Means Clustering and Saliency Map" which you can find in http://www.hindawi.com/isrn/sp/2011/393891/
24 Jun 2013 Self-Organizing Map - Simple demonstration A simple and neat implementation of a self-organizing map algorithm Author: George Azzopardi

Hi Lim, could you kindly elaborate further on your question? An SOM is a unsupervised clustering method which can be used for dimensionality reduction. In thsi simple example I am initializing a matrix of 3D neurons such that I can show them as RGB values. I wish you can be more specific such that I can help you better.
24 Jun 2013 Self-Organizing Map - Simple demonstration A simple and neat implementation of a self-organizing map algorithm Author: George Azzopardi

Oops, I wanted to write: "... elaborate further on your question?"
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25 Jun 2013 Self-Organizing Map - Simple demonstration A simple and neat implementation of a self-organizing map algorithm Author: George Azzopardi Azzopardi, George

Could you write the Matlab command that you are using to call the SOMSImple function?

I suggest that you read the article called "Self-Organizing Map-Based Color Image Segmentation with k-Means Clustering and Saliency Map" which you can find in http://www.hindawi.com/isrn/sp/2011/393891/
25 Jun 2013 Self-Organizing Map - Simple demonstration A simple and neat implementation of a self-organizing map algorithm Author: George Azzopardi Lim

I have this 'rather' big RGB image of 960 x 1280 pixels. Actually I have trouble preparing the image for SOM, as few attempts I tried on different SOM codes, it has error of 'out of memory' which I assume either the image has too much data for SOM to process or I prepared it wrongly. The purpose I want to try SOM is for image segmentation purpose.
24 Jun 2013 Self-Organizing Map - Simple demonstration A simple and neat implementation of a self-organizing map algorithm Author: George Azzopardi Azzopardi, George

Hi Lim, could you kindly elaborate further on your question? An SOM is a unsupervised clustering method which can be used for dimensionality reduction. In thsi simple example I am initializing a matrix of 3D neurons such that I can show them as RGB values. I wish you can be more specific such that I can help you better.
24 Jun 2013 Self-Organizing Map - Simple demonstration A simple and neat implementation of a self-organizing map algorithm Author: George Azzopardi Azzopardi, George

Oops, I wanted to write: "... elaborate further on your question?"
24 Jun 2013 Self-Organizing Map - Simple demonstration A simple and neat implementation of a self-organizing map algorithm Author: George Azzopardi Lim

Hi. May I know how can I test this code on my own image please?
Top Tags Applied by George
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image processing, contour detection, contrast invariant orientation tuning, cosfire, cross orientation suppression
Files Tagged by George View all
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Updated   File Tags Downloads
(last 30 days) 		Comments Rating
24 Jun 2013 Screenshot Trainable COSFIRE filters for keypoint detection and pattern recognition A COSFIRE filter detects features or patterns of interest, e.g. traffic signs in complex scenes. Author: George Azzopardi feature detection, trainable, feature, detection, keypoint detection, cosfire 81 0
10 Jun 2013 Screenshot Contour detection by CORF operator The CORF contour operator is based on a computational model of a simple cell in visual cortex. Author: George Azzopardi edge detection, contour detection, visual cortex, simple cell, gabor, signal processing 44 0
21 Jan 2013 Screenshot Self-Organizing Map - Simple demonstration A simple and neat implementation of a self-organizing map algorithm Author: George Azzopardi vector quantization, selforganizing map, neural networks, som, prototypes, machine learning 42 5
  • 4.0
4.0 | 1 rating

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