Rank: 47 based on 655 downloads (last 30 days) and 12 files submitted
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Theodoros Giannakopoulos

E-mail
Company/University
Computational Intelligence Lab @ Demokritos . gr
Lat/Long
37.96795272827148, 23.76673698425293

Personal Profile:

Theodoros Giannakopoulos received his diploma of Informatics and Telecommunications in the University of Athens (2002), M.Sc. of SIPS ("Signal and Image Processing Systems), organised by University of Patras (2004) and his PhD in the field of audio analysis (University of Athens, 2009).

He is currently a research associate in
- Computational Intelligence Laboratory (CIL) of the Institute of Informatics and Telecommunications (National Center for Scientific Research "DEMOKRITOS", Greece)
- the Dpt of Informatics and Telecommunications in the University of Athens .

WEB PAGE: http://www.di.uoa.gr/~tyiannak

Professional Interests:
Signal Processing, Pattern recognition, audio classification, content-based multimedia indexing.

 

Watch this Author's files

 

Files Posted by Theodoros View all
  • 1 - 5 of
  • 12
Updated   File Tags Downloads
(last 30 days) 		Comments Rating
15 Feb 2011 Screenshot Image Processing GUI A simple GUI with basic image processing functionalities. Author: Theodoros Giannakopoulos gui, image processing, color filtering, moion filtering 72 5
  • 4.0
4.0 | 1 rating
24 Sep 2010 Screenshot Silence removal in speech signals A simple method for silence removal in speech streams Author: Theodoros Giannakopoulos speech, audio, speech analysis, signal processing 60 0
  • 5.0
5.0 | 1 rating
24 Feb 2009 Screenshot Generate report of .m files in html table Generates a report of the m-files in a given directory. Results are stored in an html file. Author: Theodoros Giannakopoulos matlab documentation, misc, help 5 2
  • 4.0
4.0 | 1 rating
08 Nov 2008 Screenshot Image retrieval - Query by Example Demo This demo provides a simple query by image example method, based on HSV values. Author: Theodoros Giannakopoulos color, image analysis, image retrieval, query by example 100 25
  • 4.0
4.0 | 12 ratings
20 May 2008 Screenshot Generate Animated GIF Files for Plotting Audio Data This m-file generates a animated GIF file that visualizes audio data. Author: Theodoros Giannakopoulos audio processing, video processing, audio visulization, animated gif, audio data, signal processing 14 1
  • 5.0
5.0 | 1 rating
Comments and Ratings by Theodoros View all
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  • 8
Updated File Comments Rating
24 Mar 2011 mmread Read virtually any media file in Windows, Linux, or Mac. Author: Micah Richert

I've just downloaded your code and used it for reading mpeg files in Matlab. The fact that is worked without any problems on Ubuntu is really good, so ... thank you!
15 Feb 2011 Image Processing GUI A simple GUI with basic image processing functionalities. Author: Theodoros Giannakopoulos

Hi Sam. Thank you for your question. This is quite simple actually. You only need to add a button and then use the imrotate function (http://www.mathworks.com/help/toolbox/images/ref/imrotate.html). I am uploading an updated version which provides you the ability to rotate an image (rotate angle is selected in the range 0.360 using a slider).

03 Feb 2011 Image retrieval - Query by Example Demo This demo provides a simple query by image example method, based on HSV values. Author: Theodoros Giannakopoulos

Hi MUKUND SARDA, thank you for your interest. There is a quite detailed description of the algorithm above. In general the idea is quite simple: an empirical measure is defined on the thresholded distances of the HSV feature space. Then this similarity measure is sorted for returning the closest images. If you have any particular questions, please feel free to ask.
02 Dec 2010 Some Basic Audio Features Use the provided m-files for computing the features of an audio classification problem Author: Theodoros Giannakopoulos

Thank you for your feedback.
The first is simply a warning, you can get rid of it by rounding the integer index in the respective line of code in file Energy_Entropy_Block.
As far as the error is concerned, please use single & and | instead of && and ||. Sorry for that (it works on my version of Matlab though). I will repair it in a later update.
04 Oct 2010 Optical Character Recognition (OCR) The aim of OCR is to classify optical patterns corresponding to alphanumeric or other characters. Author: Diego Orlando
Comments and Ratings on Theodoros' Files View all
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01 Feb 2012 Real Time Microphone and Camera data acquisition and audio-video processing This Matlab-code is a demo for real-time audio and image processing. Author: Theodoros Giannakopoulos Sen

%%%%%%%%%%%%%%%%%%%%%%%%%%
??? Error using ==> analoginput.getdata
Timeout in GETDATA.

Error in ==> realTimeMic at 171
        x = getdata(ai, duration * Fs);
05 Jan 2012 Real Time Microphone and Camera data acquisition and audio-video processing This Matlab-code is a demo for real-time audio and image processing. Author: Theodoros Giannakopoulos Almeda, Jose

muy bueno
18 Dec 2011 Image retrieval - Query by Example Demo This demo provides a simple query by image example method, based on HSV values. Author: Theodoros Giannakopoulos Munir, Adnan

??? Error using ==> strfind
Input strings must have one row.

Error in ==> imread at 340
if (strfind(filename, '://'))

Error in ==> getImageHists at 4
RGB = imread(imageName);

Error in ==> searchImageHist at 18
[Hist, RGBQ] = getImageHists(imageName);

im getting this error by runnig ur code and im unable to solve it....do help me plz its urgent
04 Dec 2011 Real Time Microphone and Camera data acquisition and audio-video processing This Matlab-code is a demo for real-time audio and image processing. Author: Theodoros Giannakopoulos abdou, stich
01 Dec 2011 Image retrieval - Query by Example Demo This demo provides a simple query by image example method, based on HSV values. Author: Theodoros Giannakopoulos M, prabagaran

i want to know how to check similarity between two images can anyone help pls
Top Tags Applied by Theodoros
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  • 48
audio processing, video processing, audio, color, image processing
Files Tagged by Theodoros View all
  • 1 - 5 of
  • 13
Updated   File Tags Downloads
(last 30 days) 		Comments Rating
15 Feb 2011 Screenshot Image Processing GUI A simple GUI with basic image processing functionalities. Author: Theodoros Giannakopoulos gui, image processing, color filtering, moion filtering 72 5
  • 4.0
4.0 | 1 rating
24 Sep 2010 Screenshot Silence removal in speech signals A simple method for silence removal in speech streams Author: Theodoros Giannakopoulos speech, audio, speech analysis, signal processing 60 0
  • 5.0
5.0 | 1 rating
24 Feb 2009 Screenshot Generate report of .m files in html table Generates a report of the m-files in a given directory. Results are stored in an html file. Author: Theodoros Giannakopoulos matlab documentation, misc, help 5 2
  • 4.0
4.0 | 1 rating
08 Nov 2008 Screenshot Image retrieval - Query by Example Demo This demo provides a simple query by image example method, based on HSV values. Author: Theodoros Giannakopoulos color, image analysis, image retrieval, query by example 100 25
  • 4.0
4.0 | 12 ratings
20 May 2008 Screenshot Generate Animated GIF Files for Plotting Audio Data This m-file generates a animated GIF file that visualizes audio data. Author: Theodoros Giannakopoulos audio processing, video processing, audio visulization, animated gif, audio data, signal processing 14 1
  • 5.0
5.0 | 1 rating

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