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Member Profile

This is "The Multimedia Signal Processing and Security Lab", short WaveLab, website. We are a research group at the Computer Sciences Department of the University of Salzburg headed by Andreas Uhl. The short name "WaveLab" already indicates that wavelets are among our favorite tools - we have 15 years of experience in this area. Our research is focused on Multimedia Security including Watermarking, Image and Video Compression, Medical Image Classification, and Biometrics.
 
 Portrait Photo  
Firstname:  Heinz
Lastname:  Hofbauer
Room No:  0.27
Telephone:  0043-662-8044-6334
Mail: hhofbaue@cosy.sbg.ac.at

Heinz Hofbauer

 
 

 
 

Research Interests:

  • Image and video security
  • Mathematics

 
 

Publications:

    Journal Articles

    1. [Hofbauer16a   ] Experimental Analysis Regarding the Influence of Iris Segmentation on the Recognition Rate Heinz Hofbauer, Fernando Alonso-Fernandez, Josef Bigun, Andreas Uhl IET Biometrics 5:3, pp. 200-211, Institution of Engineering and Technology, March 2016
    2. [Wild16a   ] Quality-based Iris Segmentation-level Fusion Peter Wild, Heinz Hofbauer, James Ferryman, Andreas Uhl EURASIP Journal on Information Security 2016:25, 2016
    3. [Hofbauer16c    ] Identifying Deficits of Visual Security Metrics for Images Heinz Hofbauer, Andreas Uhl Signal Processing: Image Communication 46, pp. 60-75, 2016
    4. [Schraml16c   ] On rotational pre-alignment for tree log end identification using methods inspired by fingerprint and iris recognition Rudolf Schraml, Heinz Hofbauer, Alexander Petutschnigg, Andreas Uhl Machine Vision and Applications 27:8, pp. 1289-1298, 2016
    5. [DeCock14a   ] An Industry-Level Blu-ray Watermarking Framework Jan De Cock, Heinz Hofbauer, Thomas Stütz, Andreas Uhl, Andreas Unterweger Multimedia Tools and Applications 74:18, pp. 8079–8101, Springer US, 2014
    6. [Hellwagner11a   ] Secure Transport and Adaptation of MC-EZBC Video Utilizing H.264-based Transport Protocols Hermann Hellwagner, Heinz Hofbauer, Robert Kuschnig, Thomas Stütz, Andreas Uhl Elsevier Journal on Signal Processing: Image Communication 27:2, pp. 192-207, 2011
    7. [Hofbauer06a   ] Quasi Monte Carlo Integration in GRID Environments: Further Leaping Effects H. Hofbauer, A. Uhl, P. Zinterhof Parallel Processing Letters 16:3, pp. 285-311, 2006

    Book Chapters

    1. [Wild16b  ] Robust Iris Image Segmentation Peter Wild, Heinz Hofbauer, James Ferryman, Andreas Uhl In Christian Rathgeb, Christoph Busch, editors, Iris and Periocular Biometrics, pp. 24 pages, London, UK, IET, 2016, to appear
    2. [Rathgeb16a   ] Design Decisions for an Iris Recognition SDK Christian Rathgeb, Andreas Uhl, Peter Wild, Heinz Hofbauer In Kevin Bowyer, Mark J. Burge, editors, Handbook of Iris Recognition, Advances in Computer Vision and Pattern Recognition, Springer, 2016
    3. [Hofbauer08a  ] Zinterhof Sequences in GRID-Based Numerical Integration H. Hofbauer, A. Uhl, P. Zinterhof In Alexander Keller, Stefan Heinrich, Harald Niederreiter, editors, Monte Carlo and Quasi-Monte Carlo Methods 2006, pp. 495-510, Springer-Verlag, 2008
    4. [Hofbauer08b  ] A Pragmatic View on Numerical Integration of Unbounded Functions H. Hofbauer, A. Uhl, P. Zinterhof In Alexander Keller, Stefan Heinrich, Harald Niederreiter, editors, Monte Carlo and Quasi-Monte Carlo Methods 2006, pp. 511-528, Springer-Verlag, 2008

    Conference Papers

    1. [Hofbauer16b   ] Calculating a boundary for the Significance from the Equal-Error Rate Heinz Hofbauer, Andreas Uhl In Proceedings of the 9th IAPR/IEEE International Conference on Biometrics (ICB'16), pp. 1-4, 2016
    2. [Hofbauer16d     ] Isolating Iris Template Ageing in a Semi-controlled Environment Heinz Hofbauer, Inmaculada Tomeo-Reyes, Andreas Uhl In Proceedings of the International Conference of the Biometrics Special Interest Group (BIOSIG'16), pp. 8, Darmstadt, Germany, September 21 - 23
    3. [Rathgeb16b   ] TripleA: Accelerated Accuracy-preserving Alignment for Iris-Codes Christian Rathgeb, Heinz Hofbauer, Andreas Uhl, Christoph Busch In Proceedings of the 9th IAPR/IEEE International Conference on Biometrics (ICB'16), pp. 1-8, 2016
    4. [Hofbauer15a  ] Encrypting Only AC Coefficient Signs considered Harmful Heinz Hofbauer, Andreas Unterweger, Andreas Uhl In Proceedings of the IEEE International Conference on Image Processing (ICIP'15)2015
    5. [Hofbauer15b  ] Investigation of Better Portable Graphics Compression for Iris Biometric Recognition Heinz Hofbauer, Christian Rathgeb, Johannes Wagner, Andreas Uhl, Christoph Busch In Proceedings of the International Conference of the Biometrics Special Interest Group (BIOSIG'15), pp. 8, Darmstadt, Germany, September 9 - 11
    6. [Schraml15c    ] Tree Log Identification Based on Digital Cross-Section Images of Log Ends Using Fingerprint and Iris Recognition Methods Rudolf Schraml, Heinz Hofbauer, Alexander Petutschnigg, Andreas Uhl In Proceedings of the 16th International Conference on Computer Analysis of Images and Patterns (CAIP'15), pp. 752-765, LNCS, Springer Verlag, 2015
    7. [Wild15a  ] Segmentation-level Fusion for Iris Recognition Peter Wild, Heinz Hofbauer, James Ferryman, Andreas Uhl In Proceedings of the International Conference of the Biometrics Special Interest Group (BIOSIG'15), pp. 12, Darmstadt, Germany, September 9 - 11
    8. [Hofbauer14a  ] Transparent Encryption for HEVC Using Bit-Stream-Based Selective Coefficient Sign Encryption Heinz Hofbauer, Andreas Uhl, Andreas Unterweger In 2014 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), pp. 1986-1990, Florence, Italy, IEEE, May 2014
    9. [Hofbauer14b   ] A Ground Truth for Iris Segmentation Heinz Hofbauer, Fernando Alonso-Fernandez, Peter Wild, Josef Bigun, Andreas Uhl In Proceedings of the 22th International Conference on Pattern Recognition (ICPR'14), pp. 6pp., Stockholm, Sweden, August 24 - 28, 2014
    10. [Hofbauer12b  ] Image Metric-based Biometric Comparators: A Supplement to Feature Vector-based Hamming Distance? Heinz Hofbauer, Christian Rathgeb, Andreas Uhl, Peter Wild In Proceedings of the International Conference of the Biometrics Special Interest Group (BIOSIG'12), pp. 1-5, Darmstadt, Germany, September 6 - 7
    11. [Hofbauer12a  ] Iris Recognition in Image Domain: Quality-metric based Comparators Heinz Hofbauer, Christian Rathgeb, Andreas Uhl, Peter Wild In Proceedings of the 8th International Symposium on Visual Computing (ISVC'12), pp. 1-10, Crete, Greece, July 16 - 18
    12. [Hofbauer11a   ] An Effective and Efficient Visual Quality Index based on Local Edge Gradients Heinz Hofbauer, Andreas Uhl In IEEE 3rd European Workshop on Visual Information Processing, pp. 6pp., Paris, France, July 4-6,2011
    13. [Stuetz10d  ] Subjective and Objective Quality Assessment of Transparently Encrypted JPEG2000 Images Thomas Stütz, Vinod Pankajakshan, Florent Autrusseau, Andreas Uhl, Heinz Hofbauer In Proceedings of the ACM Multimedia and Security Workshop (MMSEC '10), pp. 247-252, Rome, Italy, ACM, September 9 - 10, 2010
    14. [Hofbauer10b   ] Selective Encryption of the MC-EZBC Bitstream and Residual Information Heinz Hofbauer, Andreas Uhl In 18th European Signal Processing Conference, 2010 (EUSIPCO-2010), pp. 2101-2105, Aalborg, Denmark, August 23 - 27, 2009
    15. [Hofbauer10a  ] Visual Quality Indices and Low Quality Images Heinz Hofbauer, Andreas Uhl In IEEE 2nd European Workshop on Visual Information Processing, pp. 171-176, Paris, France, July 5-7,2010
    16. [Hofbauer09c  ] Secure Scalable Video Compression for GVid H. Hofbauer, T. Stütz, A. Uhl In J. Volkert, T. Fahringer, D. Kranzlmüller, R. Kobler, W. Schreiner, editors, Proceedings of the 3rd Austrian Grid Symposium, pp. 88-102, Linz, Austria, books@ocg.at, 269, Austrian Computer Society, September, 28-29, 2009
    17. [Hofbauer09a   ] Selective Encryption of the MC EZBC Bitstream for DRM Scenarios Heinz Hofbauer, Andreas Uhl In Proceedings of the 11th ACM Workshop on Multimedia and Security, pp. 161-170, Princeton, New Jersey, USA, ACM, September 7 - 8, 2008
    18. [Hofbauer09b  ] The Cost of In-Network Adaption of the MC-EZBC for Universal Multimedia Access Heinz Hofbauer, Andreas Uhl In Proceedings of the 6th International Symposium on Image and Signal Processing and Analysis (ISPA '09)Salzburg, Austria, September 16 - 18, 2009
    19. [Hofbauer07a  ] Parameterization of Zinterhof Sequences for GRID-based QMC Integration H. Hofbauer, A. Uhl, P. Zinterhof In J. Volkert, T. Fahringer, D. Kranzlmüller, W. Schreiner, editors, Proceedings of the 2nd Austrian Grid Symposium, pp. 91-105, Innsbruck, Austria, books@ocg.at, 221, Austrian Computer Society, 2007
    20. [Hofbauer06b  ] Quasi-Monte Carlo Integration on GRIDS: Using blocked Substreams H. Hofbauer, A. Uhl, P. Zinterhof In J. Volkert, T. Fahringer, D. Kranzlmüller, W. Schreiner, editors, Proceedings of the 1st Austrian Grid Symposium, pp. 219-233, Schloss Hagenberg, Austria, books@ocg.at, 210, Austrian Computer Society, 2006
    21. [Hofbauer06c  ] Selective Encryption for hierarchical MPEG Heinz Hofbauer, Thomas Stütz, Andreas Uhl In H. Leitold, E. Markatos, editors, Communications and Multimedia Security, Proceedings of the 10th IFIP International CMS 2006 Conference, pp. 151-160, Lecture Notes on Computer Science, 4237, Springer Verlag, Oct. 2006

    Technical Reports

    1. [Schraml15a  ] Tree log identification based on digital cross-section images of log ends using fingerprint and iris recognition methods Rudolf Schraml, Heinz Hofbauer, Andreas Uhl Department of Computer Sciences, University of Salzburg, Austriahttp://www.cosy.sbg.ac.at/tr, Technical Report 2015-01, 2015

    Theses

    1. [Hofbauer13b  ] Visual Evaluation, Scaling and Transport of Secure Videos Heinz Hofbauer PhD thesis, University of Salzburg, Department of Computer Sciences, April 2013
    2. [Hofbauer07b  ] Improper Integrals and QMC Integration in a Grid Environemnt Heinz Hofbauer Master thesis, University of Salzburg, Department of Computer Sciences, Dec. 2007