Sofia Tsekeridou
Aristotle University of Thessaloniki
51 Papers
517 Citations
Sofia Tsekeridou is an academic researcher from Aristotle University of Thessaloniki. The author has contributed to research in topics: Digital watermarking & Watermark. The author has an hindex of 15, co-authored 48 publications.
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Papers
Facial feature extraction in frontal views using biometric analogies
Sofia Tsekeridou,Ioannis Pitas +1 more
- 01 Sep 1998
TL;DR: A face detection and facial feature extraction in frontal views algorithm based on principles described in [1] but extends the work by considering: (a) the mirror-symmetry of the face in the vertical direction and (b) facial biometric analogies depending on the size of the faces estimated by the face localization method.
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A benchmarking protocol for watermarking methods
V. Solachidis,Anastasios Tefas,Nikos Nikolaidis,Sofia Tsekeridou,Athanasios Nikolaidis,Ioannis Pitas +5 more
- 07 Oct 2001
TL;DR: Although the system described is used for image watermarking, the general framework can be used, by introducing a different set of attacks, for benchmarking of video and audio data.
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A survey on watermarking application scenarios and related attacks
Athanasios Nikolaidis,Sofia Tsekeridou,Anastasios Tefas,V. Solachidis +3 more
- 07 Oct 2001
TL;DR: A thorough investigation on all possible scenarios where digital imperceptible watermarking is applicable is presented, and possible attacks are divided into categories and application scenarios are presented, always referring to theWatermarking parameters involved.
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Performance analysis of correlation-based watermarking schemes employing Markov chaotic sequences
Anastasios Tefas,Athanasios Nikolaidis,Nikos Nikolaidis,V. Solachidis,Sofia Tsekeridou,Ioannis Pitas +5 more
TL;DR: Skew tent chaotic sequences are compared against the widely used pseudorandom sequences, indicating the superiority of the former in watermarking applications and the minimum number of samples required for reliable watermark detection is investigated.
Statistical analysis of a watermarking system based on Bernoulli chaotic sequences
Sofia Tsekeridou,V. Solachidis,Nikos Nikolaidis,Athanasios Nikolaidis,Anastasios Tefas,Ioannis Pitas +5 more
TL;DR: The aim of the paper is to introduce the n-way Bernoulli shift generated chaotic watermarks and theoretically contemplate their properties with respect to the detection reliability and to theoretically establish their potential superiority against the widely used (pseudo-)random watermarks.
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