DIGITAL 

WATERMARKS

For Copyright Protection
of Still Images , Audio & Video

A.I.I.A. Laboratory

Dept. of Informatics

Aristotle University of Thessaloniki


What are Watermarks?

Watermarks developed in our Lab

Related Publications

Related Links

Related Software

Special Events

Contact Address :

Prof. Ioannis Pitas

Dept. of Informatics
Aristotle University of Thessaloniki
Box 451
Thessaloniki, GR-540.06
GREECE

Tel:+30-31-996304
Fax:+30-31-996304

E-mail: pitas@zeus.csd.auth.gr

WHAT ARE WATERMARKS?

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WATERMARKS DEVELOPED IN OUR LAB

Our Watermarks can be used to sign digital still images, (color or gray scale), digital video , and digital audio signals. They are characterized by the following technical characteristics: An examble of a Watermarked Image (24-bit color)

A Brief Report about our Watermarking Methods

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OUR PUBLICATIONS on WATERMARKING

-postscript files (gzip) - I.Pitas and T.H. Kaskalis, Applying Signatures on Digital Images, IEEE Workshop on Nonlinear Image and Signal Processing, Neos Marmaras , Greece, pp. 460-463, June 1995

A. Bors and I. Pitas, Embedding Parametric Digital Signatures in Images, EUSIPCO-96, Trieste, Italy, vol. III, pp. 1701-1704, September 1996

A. Bors and I. Pitas, Image Watermarking Using DCT Domain Constraints, 1996 IEEE International Conference on Image Processing (ICIP'96), Lausanne , Switzerland, vol. III, pp. 231-234, 16-19 September 1996

N. Nikolaidis and I. Pitas, Copyright protection of images using robust digital signatures, IEEE International Conference on Acoustics, Speech a nd Signal Processing (ICASSP-96), vol. 4, pp. 2168-2171, May 1996

I. Pitas, A Method for Signature Casting on Digital Images, 1996 IEEE International Conference on Image Processing (ICIP'96), Lausanne, Switzerland, vol. III, pp. 215-218, 16-19 September 1996.

G. Voyatzis and I. Pitas, Chaotic Mixing of Digital Images and Applications to Watermarking, European Conference on Multimedia Applications, services and Techniques (ECMAST'96), Louvain-la-Neuve, Belgium, vol. 2, pp. 687-695, May 1996

G. Voyatzis and I. Pitas, Applications of Toral Automorphisms in Image Watermarking, 1996 IEEE International Conference on Image Processing (ICIP'96), Lausanne, Switzerland, vol. II, pp. 237-240, 16-19 September 1996

G. Voyatzis and I. Pitas, Embedding Robust Watermarks by Chaotic Mixing, 13th International Conference on Digital Signal Processing (DSP'97), Santorini, Greece, vol. 1, pp. 213-216, 2-4 July 1997

P. Bassia and I. Pitas, Robust Audio Watermarking in the Time Domain, IX European Signal Processing Conference (EUSIPCO'98), Rhodes, Greece, vol. I, pp. 25-28, 8-11 September 1998

G. Voyatzis, N. Nikolaidis and I. Pitas, Digital Watermarking: An Overview, IX European Signal Processing Conference (EUSIPCO'98), Rhodes, Greece, vol. I, pp. 9-12, 8-11 September 1998

G. Voyatzis and I. Pitas, Chaotic Watermarks for Embedding in the Spatial Digital Image Domain, IEEE Int. Conference on Image Processing (ICIP'98), Chicago, Illinois, USA, accepted for publication, 4-7 October 1998

G. Voyatzis, N. Nikolaidis and I. Pitas, Copyright Protection of Multimedia Documents: From Theory to Application, 4th Hellenic European Conference on Computer Mathematics and its Applications, accepted for publication, 1998

A. Nikolaidis and I. Pitas, A Robust Feature-based Technique for Watermarking Frontal Face Images, IEEE-EURASIP Wor. on Nonlinear Signal and Image Processing (NSIP'99), vol. 1, pp. 341-345, Antalya, Turkey, 20-23 June 1999

N. Nikolaidis and I. Pitas, Digital Image Watermarking: an Overview, Int. Conf. on Multimedia Computing and Systems (ICMCS'99), vol. I, pp. 1-6, Florence, Italy, 7-11 June 1999

V. Solachidis and I. Pitas, Circularly symmetric watermark embedding in 2-D DFT domain, IEEE Int. Conf. on Acoustics, Speech and Signal Processing (ICASSP'99), Phoenix, Arizona, USA, vol.6, pp. 3469-3472, 15-19 March 1999

A. Nikolaidis and I. Pitas, Comparison of different chaotic maps with application to image watermarking, IEEE Int. Symposium on Circuits and Systems (ISCAS 2000), Geneva, Switzerland, vol. V, pp. 509-512, 28-31 May 2000

A. Nikolaidis and I. Pitas, A region-based technique for chaotic image watermarking, EURASIP European Signal Processing Conference (EUSIPCO 2000), Tampere, Finland, 5-8 September 2000

N. Nikolaidis, S. Tsekeridou, A. Nikolaidis, A. Tefas, V. Solachidis and I. Pitas, Applications of chaotic signal processing techniques to multimedia watermarking, Proceedings of the IEEE workshop on Nonlinear Dynamics in Electronic Systems, pp. 1-7, Catania Italy, May 18-20 2000

V. Solachidis, N. Nikolaidis and I. Pitas, Watermarking Polygonal Lines Using Fourier Descriptors, IEEE Int. Conf. on Acoustics, Speech and Signal Processing (ICASSP'2000), Istanbul, Turkey, vol. IV, pp 1955-1958, 5-9 June 2000

V. Solachidis, I. Pitas, Self-similar ring shaped watermark embedding in 2-D DFT domain 2000 European Signal Processing Conf. (EUSIPCO'00) CD-ROM, Tampere, Finland, 5-8 September 2000

V. Solachidis, N. Nikolaidis, I. Pitas, Fourier descriptors watermarking of vector graphic images 2000 IEEE Int. Conf. on Image Processing (ICIP'00) accepted for publication, Vancouver, Canada, 10-13 September 2000

A. Tefas and I. Pitas, Multi-bit Image Watermarking Robust to Geometric Distortions, IEEE International conference on Image Processing (ICIP'2000) CD-ROM, Vancouver, Canada, 10-13 September 2000

A. Tefas and I. Pitas, Image Authentication based on Chaotic Mixing, IEEE International Symposium on Circuits and Systems (ISCAS'2000), Geneva, Switzerland, 28-31 May 2000.

A. Tefas and I. Pitas, Image Authentication and Tamper Proofing using Mathematical Morphology, European Signal Processing Conference (EUSIPCO'2000), Tampere, Finland, 5-8 September 2000, vol.3, pp. 1681-1684

S. Tsekeridou, I. Pitas, Wavelet-based Self-Similar Watermarking for Still Images, 2000 IEEE Int. Symposium on Circuits and Systems (ISCAS'00) vol. I, pp. 220-223, Geneva, Switzerland, 28-31 May 2000

S. Tsekeridou, I. Pitas,  Embedding Self-Similar Watermarks in the Wavelet Domain, 2000 IEEE Int. Conf. on Acoustics, Systems and Signal Processing (ICASSP'00), vol. IV, pp. 1967-1970, Istanbul, Turkey, 5-9 June 2000

S. Tsekeridou, N. Nikolaidis, N. Sidiropoulos, I. Pitas, Copyright Protection of Still Images Using Self-Similar Chaotic Watermarks 2000 IEEE Int. Conf. on Image Processing (ICIP'00) accepted for publication, Vancouver, Canada, 10-13 September 2000

A. Nikolaidis, S. Tsekeridou, A. Tefas and V. Solachidis, A survey on watermarking application scenarios and related attacks, IEEE International Conference on Image Processing (ICIP 2001), Thessaloniki, Greece, 7-10 October 2001, accepted for publication

V. Solachidis, A. Tefas, N. Nikolaidis, S. Tsekeridou, A. Nikolaidis, I.Pitas, A benchmarking protocol for watermarking methods, 2001 IEEE Int. Conf. on Image Processing (ICIP'01), accepted for publication, Thessaloniki, Greece, 7-10 October, 2001

V. Solachidis, S. Tsekeridou, A. Tefas, I.Pitas, A simple benchmarking system for performance evaluation of still image watermarking methods, 1st International Symposium on Telecommunications (IST'01), accepted for publication, Tehran, IRAN; 1-3 September, 2001

A. Tefas , A. Nikolaidis, N. Nikolaidis, V. Solachidis, S. Tsekeridou and I. Pitas, Statistical Analysis of Markov Chaotic Sequences for Watermarking applications, 2001 IEEE International Symposium on Circuits and Systems (ISCAS 2001), CD-ROM, May 6 - 9, 2001 Sydney, Australia.

A. Tefas and I. Pitas, Robust Spatial Image Watermarking using Progressive Detection, Proc. of 2001 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP 2001), CD-ROM, Salt Lake City, Utah, USA, 7-11 May.

A. Tefas , A. Nikolaidis, N. Nikolaidis, V. Solachidis, S. Tsekeridou and I. Pitas, Performance Analysis of Watermarking Schemes based on Skew Tent Chaotic Sequences, NSIP'01, CD-ROM, Baltimore, Maryland, USA, 3-6 June, 2001

A. Tefas , A. Nikolaidis, N. Nikolaidis, V. Solachidis, S. Tsekeridou and I. Pitas, Markov Chaotic Sequences for Correlation based Watermarking schemes, International Conference on Nonlinear Dynamics (NLD'01), Thessaloniki, Greece, 27-30 August, 2001

S. Tsekeridou, V. Solachidis, N. Nikolaidis, A. Nikolaidis, A. Tefas, I. Pitas, Bernoulli Shift Generated Chaotic Watermarks: Theoretic Investigation, IEEE Int. Conf. on Acoustics, Speech and Signal Processing (ICASSP2001), accepted for publication, Salt Lake City, Utah, USA, 7-11 May 2001

S. Tsekeridou, V. Solachidis, N. Nikolaidis, A. Nikolaidis, A. Tefas, I. Pitas, Theoretic Performance Analysis of a Watermarking System based on Bernoulli Chaotic Sequences, Communications and Multimedia Security Conf. (CMS 2001), accepted for publication, Darmstadt, Germany, 21-22 May 2001

S. Tsekeridou, V. Solachidis, N. Nikolaidis, A. Nikolaidis, A. Tefas, I. Pitas, Theoretic Investigation of the Use of Watermark Signals derived from Bernoulli Chaotic Sequences, 12th Scandinavian Conference on Image Analysis 2001 (SCIA2001), accepted for publication, Bergen, Norway, 11-14 June 2001

A.G. Bors and I. Pitas, Image Watermarking Using Block Site Selection and DCT Domain Constraints, Optics Express, vol. 3, no. 12, pp. 512-522, Dec. 1998

N. Nikolaidis and I. Pitas, Robust image watermarking in the spatial domain, Signal Processing, Elsevier, vol. 66, no. 3, pp. 385-403, 1998

I. Pitas, A Method for Watermark Casting in Digital Images, IEEE Trans. on Circuits and Systems on Video Technology, vol. 8, no.6, October 1998

G. Voyatzis and I. Pitas, Digital Image Watermarking using Mixing Systems, Computer Graphics, Elsevier, vol. 22, no. 4,pp. 405-416, 1998

C. Busch, K. Nahrstedt and I. Pitas, Image Security, IEEE Computer Graphics and Applications, vol. 19, no. 1, pp. 16-17, Jan.-Feb. 1999

G. Voyatzis and I. Pitas, Problems and Challenges in Multimedia Networking and Content Protection, TICSP Series #3, Trends and Challenges, Contributions to Workshop on Trends and Important Challenges in Signal Processing, ed. Jaakko Astola, March 1999

G. Voyatzis and I. Pitas, Protecting digital image copyrights: a framework, IEEE Computer Graphics and Applications, vol. 19, no. 1, pp. 18 -24, Jan.-Feb. 1999

G. Voyatzis and I. Pitas, The use of watermarks in the protection of digital multimedia products, Proceedings of the IEEE, vol. 87, no. 7, pp. 1197-1207, July 1999

A. Nikolaidis and I. Pitas, Robust watermarking of facial images based on salient geometric pattern matching, IEEE Trans. on Multimedia vol. 2, no. 3, pp. 172-184, September 2000

S. Stankovic, I. Djurovic and I. Pitas, Watermarking in the Space/Spatial Domain Using Two-Dimentional Radon Wigner distribution, IEEE Trans. on Image Processing, preprint, to appear, 2000

S. Tsekeridou, V. Solachidis, N. Nikolaidis, A. Nikolaidis, A. Tefas and I. Pitas, Statistical Analysis of a Watermarking System based on Bernoulli Chaotic Sequences, Signal Processing, Elsevier Special Issue on Information Theoretic Issues in Digital Watermarking, 81 (6) (2001) pp. 1273-1293

Barni, A. Tefas, F. Bartollini and I. Pitas, Image Authentication Techniques for Surveillance Applications, Proceedings of the IEEE, July 2001

P. Bassia, I. Pitas, N. Nikolaidis Robust audio watermarking in the time domain, IEEE Transactions on Multimedia, vol 3 no. 2, June 2001, pp. 232 -241

V. Solachidis and I. Pitas, Circularly Symmetric Watermark Embedding in 2D DFT domain , to appear in Transactions on Image Processing

A. Nikolaidis and I.Pitas, Region based image watermarking, to appear in Transactions on Image Processing

-postscript files (pkzip) -

G. Voyatzis and I. Pitas, Digital Image Watermarking using Mixing Systems, in Computer & Graphics, vol 22, no 3, 1998.

V. Basia and I. Pitas, Robust Audio Watermarking in the time-domain, to appear in Proc. of EUSIPCO'98, September 8-11, Rhodes, Greece, 1998.

G. Voyatzis, N. Nikolaidis and I. Pitas, Digital Watermarking: An Overview, to appear in Proc. of EUSIPCO'98, September 8-11, Rhodes, Greece, 1998.

G. Voyatzis and I. Pitas, Chaotic Watermarks for embedding in the spatial digital image domain, to appear in Proc. of ICIP'98, October 4-7, Chicago, USA, 1998.

G. Voyatzis and I. Pitas, Problems and Challenges in Multimedia Networking and Content Protection, (Lecture notes) to appear in Proc. of Workshop on Trends and Impo rtant Challenges in Signal Processing, June 15-17, Kirkkonummi, Finland, 1998.
 
 

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Related LINKS

Links proposed by Frank Hartung

Links proposed by Jian Zhao

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SOFTWARE

Alpha Tec Ltd. (EIKONAmark)

Digimark Corp

MIT Media Lab (PixelTag)

Signum Technologies

SysCoP

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SPECIAL EVENTS about Watermarks

Special session on Watermarking techniques, ICIP'96

IX European Signal Processing Conference, September 8-11, 1998, Island of Rhodes, Greece (EUSIPCO'98). (Special session on Copyright protection and Access control is organized by prof. Pitas)

Special Issue on Copyright Protection and Access Control for Multimedia Services, Signal Processing 1998

Issue on Image Security, IEEE Computer Graphics and Applications, 1998, editor: Christoph Busch

Issue on Identification and protection of Multimedia Information, Proceedings of the IEEE, 1999, editor: Benoit Macq

Special Section on Information theoretic aspects of digital watermarking, Signal Processing, 2001, editors: Vito Cappellini, Mauro Barni, Franco Bartolini

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Aristotle University of Thessaloniki 

Computer Science Department

A.I.I.A LAB


 

Official member of the 
WATERMARKING Webring

Want to join the WATERMARKING Ring?

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