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Stavros Theodorakis

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Stavros Theodorakis
PhD Student
Office: 2.2.19
Phone: (+30) 210772-2964
Fax: (+30) 210772-3397
E-mail: sth@cs
addresses are formatted


Stavros Theodorakis was born in Athens in 1984. He received the Diploma degree in Electrical and Computer Engineering from National Technical University of Athens in June 2008. He first joined CVSP group in the final year of his undergraduate studies while working on his Diploma Thesis, supervised by Professor Petros Maragos. His Diploma Thesis was in Isolated Greek Sign Language Recognition using Hidden Markov Models.

Stavros is currently a PhD student in the CVSP group, school of ECE, NTUA, working in the general area of Pattern Recognition. His research interests lie primary in the field of pattern analysis and pattern recognition with main applications on gesture and sign language recognition.


  • S. Theodorakis, V. Pitsikalis, I. Rodomagoulakis and P. Maragos,
    Recognition with Raw Canonical Phonetic Movement and Handshape Subunits on Videos of Continuous Sign Language,
    Proc. IEEE Int'l Conf. on Image Processing (ICIP 2012), Orlando, Florida, USA, Sep. 30-Oct. 3, 2012 (to appear).

  • P. Pitsikalis, S. Theodorakis, C. Vogler and P. Maragos
    Advances in Phonetics-based Sub-Unit Modeling for Transcription Alignment and Sign Language Recognition,
    CVPR Workshop Gesture Recognition, Colorado Springs, June 2011.
    Pascal2 best paper award
  • [bib] [preprint]
  • I. Rodomadoulakis, S. Theodorakis, V. Pitsikalis and P. Maragos
    Global+Local Active Appearance Models for Analysis and Classification of Sign Language Facial Expressions,
    Gesture Workshop (GW-2011), Greece, Athens, May 2011.
  • [bib]
  • S. Theodorakis, V. Pitsikalis and P. Maragos
    Advances in Dynamic-Static Integration of Movement and Handshape Cues for Sign Language Recognition,
    Gesture Workshop (GW-2011), Greece, Athens, May 2011.
  • [bib]
  • A. Roussos, S. Theodorakis, V. Pitsikalis and P. Maragos
    Hand Tracking and Affine Shape-Appearance Handshape Sub-units in Continuous Sign Language Recognition,
    Workshop on Sign, Gesture and Activity, 11th European Conference on Computer Vision (ECCV), Heraklion, Greece. 2010 .
  • [bib] [pdf]
  • A. Roussos, S. Theodorakis, V. Pitsikalis and P. Maragos
    Affine-Invariant Modeling of Shape-Appearance Images applied on Sign Language Handshape Classification,
    IEEE Proc. ICIP 2010 .
  • [bib] [pdf]
  • V. Pitsikalis,S. Theodorakis, P. Maragos,
    Data-Driven Sub-Units and Modeling Structure for Continuous Sign Language Recognition with Multiple Cues,
    LREC Workshop on the Representation and Processing of Sign Languages: Corpora and Sign Language Technologies (LREC-2010), Valletta, Malta , May. 2010.
  • [bib]
  • S. Theodorakis, V. Pitsikalis, P. Maragos,
    Model-Level Data-Driven sub-units for Signs in videos of continuous sign language,
    Proc. IEEE Int'l Conference on Acoustics, Speech, and Signal Processing (ICASSP-2010), Dallas, Texas, March. 2010.
  • [bib] [pdf] [poster]
  • S. Theodorakis, A. Katsamanis, P. Maragos,
    Product-HMMs for automatic sign language recognition,
    Proc. IEEE Int'l Conference on Acoustics, Speech, and Signal Processing (ICASSP-2009), Taipei, Taiwan, Apr. 2009.
  • [bib] [pdf]

Diploma Thesis

Last modified: Friday, 31 October 2008 | Created by Nassos Katsamanis and George Papandreou