A Novel Edge Detector Based on Nonlinear Local Operations. - George Economou; Spiros Fotopoulos; M. Vemis (ISCAS, 1994)

Vector Nonlinear Data Depended Filters. - Spiros Fotopoulos; George Economou; Nikolaos A. Laskaris; Dimitris Sindoukas (ISCAS, 1994)

The use of Boolean functions and local operations for edge detection in images. - M. Vemis; George Economou; Spiros Fotopoulos; A. Khodyrev (Signal Process., 1995)

Latency measurement improvement of P100 complex in visual evoked potentials by FMH filters. - Spiros Fotopoulos; George Economou; Anastasios Bezerianos; Nikos Laskaris (IEEE Trans. Biomed. Eng., 1995)

A family of nonlinear filters with data dependent coefficients. - George Economou; Spiros Fotopoulos; M. Vemis (IEEE Trans. Signal Process., 1995)

Multichannel distance filtering of seismic electric signals. - George Economou; Apostolos Ifantis; Dimitris Sindoukas (EUSIPCO, 1996)

Color image filtering using generalized cost functions. - Dimitris Sindoukas; Spiros Fotopoulos; George Economou (EUSIPCO, 1996)

Image enhancement using color and spatial information. - Spiros Fotopoulos; Dimitris Sindoukas; Nikolaos A. Laskaris; George Economou (ICASSP, 1997)

The use of entropy for colour edge detection. - A. Fotinos; George Economou; Evangelos Zigouris; Spiros Fotopoulos (ICECS, 1999)

Multidimensional Fuzzy Filtering using Statistical Parameters. - A. Fotinos; Nikos Laskaris; George Economou; Spiros Fotopoulos (Multidimens. Syst. Signal Process., 1999)

A histogram based multichannel filter. - A. Fotinos; George Economou; Evangelos Zigouris; Spiros Fotopoulos (EUSIPCO, 2000)

Segmentation of color images using a hierarchical fuzzy region merging technique. - Sokratis Makrogiannis; George Economou; Evangelos Zigouris; Spiros Fotopoulos (EUSIPCO, 2000)

Color image edge detection based on nonparametric density estimation. - George Economou; A. Fotinos; Sokratis Makrogiannis; Spiros Fotopoulos (ICIP (1), 2001)

A Fuzzy Dissimilarity Function for Region Based Segmentation of Color Images. - Sokratis Makrogiannis; George Economou; Spiros Fotopoulos (Int. J. Pattern Recognit. Artif. Intell., 2001)

A fuzzy region dissimilarity measure using feature space information. - Sokratis Makrogiannis; George Economou; Spiros Fotopoulos (DSP, 2002)

Region oriented compression of color images using fuzzy inference and fast merging. - Sokratis Makrogiannis; George Economou; Spiros Fotopoulos (Pattern Recognit., 2002)

Color image segmentation using multiscale fuzzy C-means and graph theoretic merging. - Sokratis Makrogiannis; Christos Theoharatos; George Economou; Spiros Fotopoulos (ICIP (1), 2003)

Geodesic distance and MST based image segmentation. - George Economou; Vasileios K. Pothos; Apostolos Ifantis (EUSIPCO, 2004)

A similarity measure for color image retrieval and indexing based on the Multivariate Two Sample Problem. - Christos Theoharatos; Nikolaos A. Laskaris; George Economou; Spiros Fotopoulos (EUSIPCO, 2004)

Color-based image retrieval using vector quantization and multivariate graph matching. - Christos Theoharatos; George Economou; Spiros Fotopoulos; Nikolaos A. Laskaris (ICIP (1), 2005)

Compressed Domain Image Indexing and Retrieval Based on the Minimal Spanning Tree. - Christos Theoharatos; Vasileios K. Pothos; George Economou; Spiros Fotopoulos (ICME, 2005)

Color edge detection using the minimal spanning tree. - Christos Theoharatos; George Economou; Spiros Fotopoulos (Pattern Recognit., 2005)

A Generic Scheme for Color Image Retrieval Based on the Multivariate Wald-Wolfowitz Test. - Christos Theoharatos; Nikolaos A. Laskaris; George Economou; Spiros Fotopoulos (IEEE Trans. Knowl. Data Eng., 2005)

A region dissimilarity relation that combines feature-space and spatial information for color image segmentation. - Sokratis Makrogiannis; George Economou; Spiros Fotopoulos (IEEE Trans. Syst. Man Cybern. Part B, 2005)

Segmentation of color images using multiscale clustering and graph theoretic region synthesis. - Sokratis Makrogiannis; George Economou; Spiros Fotopoulos; Nikolaos G. Bourbakis (IEEE Trans. Syst. Man Cybern. Part A, 2005)

Points of interest extraction using pairwise clustering and spatial features. - Dimitrios Besiris; Nikolaos A. Laskaris; Evangelos Zigouris; George Economou; Spiros Fotopoulos (EUSIPCO, 2006)

Combining self-organizing neural nets with multivariate statistics for efficient color image retrieval. - Christos Theoharatos; Nikolaos A. Laskaris; George Economou; Spiros Fotopoulos (Comput. Vis. Image Underst., 2006)

Multivariate image similarity in the compressed domain using statistical graph matching. - Christos Theoharatos; Vasileios K. Pothos; Nikolaos A. Laskaris; George Economou; Spiros Fotopoulos (Pattern Recognit., 2006)

Texture retrieval based on a non-parametric measure for multivariate distributions. - Vasileios K. Pothos; Christos Theoharatos; George Economou; Apostolos Ifantis (CIVR, 2007)

Robust Face Recognition and Retrieval Using Neural-Network-Based Quantization of Gabor Jets and Statistical Graph Matching. - Vasileios K. Pothos; Christos Theoharatos; George Economou (ICTAI (1), 2007)

Key frame extraction in video sequences: a vantage points approach. - Dimitrios Besiris; Nikolaos A. Laskaris; Fotini Fotopoulou; George Economou (MMSP, 2007)

An application study of manifold learning-ranking techniques in face recognition. - Athanassios Zagouras; George Economou; Andrew Macedonas; Spiros Fotopoulos (MMSP, 2007)

Improvement of Image Retrieval by Fusing Different Descriptors. - Andrew Macedonas; Spiros Fotopoulos; George Economou (WIAMIS, 2007)

Semantic Mapping of Image Databases using Perceptual Similarity. - Christos Theoharatos; George Economou; Spiros Fotopoulos (WIAMIS, 2007)

On the Perceptual Organization of Image Databases Using Cognitive Discriminative Biplots. - Christos Theoharatos; Nikolaos A. Laskaris; George Economou; Spiros Fotopoulos (EURASIP J. Adv. Signal Process., 2007)

Charting of geoelectric potential signal dynamics via geometrical techniques and its possible relation to significant earthquakes in Western Greece. - Christos Theoharatos; Apostolos Ifantis; Nikolaos A. Laskaris; George Economou (Comput. Geosci., 2008)

Dictionary based color image retrieval. - Andrew Makedonas; Dimitrios Besiris; George Economou; Spiros Fotopoulos (J. Vis. Commun. Image Represent., 2008)

Distributional-based texture classification using non-parametric statistics. - Vasileios K. Pothos; Christos Theoharatos; Evangelos Zygouris; George Economou (Pattern Anal. Appl., 2008)

A spectral distribution approach to fingerprint verification. - Vasileios K. Pothos; Christos Theoharatos; Apostolos Ifantis; George Economou (DPS, 2009)

A machine vision based method for atmospheric circulation classification. - Athanassios Zagouras; Athanassios A. Argiriou; Helena A. Flocas; George Economou; Spiros Fotopoulos (DPS, 2009)

Color image segmentation using Laplacian eigenmaps. - Ioannis Tziakos; Christos Theoharatos; Nikolaos A. Laskaris; George Economou (J. Electronic Imaging, 2009)

Combining graph connectivity & dominant set clustering for video summarization. - Dimitrios Besiris; Andrew Makedonas; George Economou; Spiros Fotopoulos (Multim. Tools Appl., 2009)

Fusion in phase space for shape retrieval. - Fotini Fotopoulou; Ilias Theodorakopoulos; George Economou (EUSIPCO, 2011)

Fusion of directional transitional features for off-line signature verification. - Konstantinos Tselios; Elias N. Zois; Athanasios Nassiopoulos; George Economou (IJCB, 2011)

Face recognition via local sparse coding. - Ilias Theodorakopoulos; Ioannis Rigas; George Economou; Spiros Fotopoulos (ICCV, 2011)

Automated Off-Line Writer Verification Using Short Sentences and Grid Features. - Konstantinos Tselios; Elias N. Zois; Athanasios Nassiopoulos; Sotiris Karabetsos; George Economou (AFHA, 2011)

Off-Line Signature Verification Using Two Step Transitional Features. - Elias N. Zois; Athanasios Nassiopoulos; Konstantinos Tselios; Elias Siores; George Economou (MVA, 2011)

HEp-2 Cells classification via fusion of morphological and textural features. - Ilias Theodorakopoulos; Dimitris Kastaniotis; George Economou; Spiros Fotopoulos (BIBE, 2012)

Human eye movements as a trait for biometrical identification. - Ioannis Rigas; George Economou; Spiros Fotopoulos (BTAS, 2012)

A Semi-Analytical Macroscopic MAC Layer Model for LTE Uplink. - Spiros Louvros; Athanasios C. Iossifides; Konstantinos Aggelis; Agamemnon Baltagiannis; George Economou (NTMS, 2012)

A local spectral distribution approach to face recognition. - Vasileios K. Pothos; Christos Theoharatos; George Economou (Comput. Vis. Image Underst., 2012)

Grid-based feature distributions for off-line signature verification. - Konstantinos Tselios; Elias N. Zois; Elias Siores; Athanasios Nassiopoulos; George Economou (IET Biom., 2012)

Biometric identification based on the eye movements and graph matching techniques. - Ioannis Rigas; George Economou; Spiros Fotopoulos (Pattern Recognit. Lett., 2012)

Analyzing Functional Brain Connectivity by Means of Commute Times: A New Approach and its Application to Track Event-Related Dynamics. - Stavros I. Dimitriadis; Nikolaos A. Laskaris; Areti Tzelepi; George Economou (IEEE Trans. Biomed. Eng., 2012)

HEp-2 cells classification using locally aggregated features mapped in the dissimilarity space. - Dimitris Kastaniotis; Ilias Theodorakopoulos; George Economou; Spiros Fotopoulos (BIBE, 2013)

Local focus-tolerant image descriptors for classification of biological particles. - Nefeli Vassiliki Politi-Stergiou; Ilias Theodorakopoulos; George Economou (BIBE, 2013)

Off-Line Signature Verification based on Ordered Grid Features: An Evaluation. - Konstantina Barkoula; Elias N. Zois; Evangelos Zervas; George Economou (AFHA, 2013)

Gait-based gender recognition using pose information for real time applications. - Dimitris Kastaniotis; Ilias Theodorakopoulos; George Economou; Spiros Fotopoulos (DSP, 2013)

Unsupervised music segmentation via multi-scale processing of compressive features' representation. - Ilias Theodorakopoulos; George Economou; Spiros Fotopoulos (DSP, 2013)

Event Based Offline Signature Modeling Using Grid Source Probabilistic Coding. - Konstantina Barkoula; Elias N. Zois; Evangelos Zervas; George Economou (ICIAP Workshops, 2013)

Shape Representation via the Generalized Geodesic Median Point. - Fotini Fotopoulou; Dimitris Kastaniotis; Ilias Theodorakopoulos; George Economou (ICPRAM, 2013)

Classification of Dissimilarity Data via Sparse Representation. - Ilias Theodorakopoulos; George Economou; Spiros Fotopoulos (ICPRAM, 2013)

On-line signature recognition via fusion of dynamic features into dissimilarity space. - Ilias Theodorakopoulos; George Economou; Spiros Fotopoulos; Apostolos Ifantis (ISSPIT, 2013)

Collaborative Sparse Representation in Dissimilarity Space for Classification of Visual Information. - Ilias Theodorakopoulos; George Economou; Spiros Fotopoulos (ISVC (1), 2013)

Online signature verification based on signatures turning angle representation using longest common subsequence matching. - Konstantina Barkoula; George Economou; Spiros Fotopoulos (Int. J. Document Anal. Recognit., 2013)

Low-Level Visual Saliency With Application on Aerial Imagery. - Ioannis Rigas; George Economou; Spiros Fotopoulos (IEEE Geosci. Remote. Sens. Lett., 2013)

Advanced leaf image retrieval via Multidimensional Embedding Sequence Similarity (MESS) method. - Fotini Fotopoulou; Nikolaos A. Laskaris; George Economou; Spiros Fotopoulos (Pattern Anal. Appl., 2013)

Graph Based Re-ranking Method with Application to Handwritten Digits. - Fotini Fotopoulou; George Economou (ICFHR, 2014)

Poset Description of Grid Features and Application to Off-Line Signature Verification. - Elias N. Zois; Evangelos Zervas; Konstantina Barkoula; George Economou; Spiros Fotopoulos (ICFHR, 2014)

HEp-2 Cells Classification Using Morphological Features and a Bundle of Local Gradient Descriptors. - Ilias Theodorakopoulos; Dimitris Kastaniotis; George Economou; Spiros Fotopoulos (I3A@ICPR, 2014)

Using kinect for assesing the state of Multiple Sclerosis patients. - Dimitris Kastaniotis; George Economou; Spiros Fotopoulos; Gerasimos Kartsakalis; Panagiotis Papathanasopoulos (MobiHealth, 2014)

HEp-2 Cell Classification Using Descriptors Fused into the Dissimilarity Space into the Dissimilarity Space. - Ilias Theodorakopoulos; Dimitris Kastaniotis; George Economou; Spiros Fotopoulos (Int. J. Artif. Intell. Tools, 2014)

Pose-based human action recognition via sparse representation in dissimilarity space. - Ilias Theodorakopoulos; Dimitris Kastaniotis; George Economou; Spiros Fotopoulos (J. Vis. Commun. Image Represent., 2014)

HEp-2 cells classification via sparse representation of textural features fused into dissimilarity space. - Ilias Theodorakopoulos; Dimitris Kastaniotis; George Economou; Spiros Fotopoulos (Pattern Recognit., 2014)

Efficient modeling of visual saliency based on local sparse representation and the use of hamming distance. - Ioannis Rigas; George Economou; Spiros Fotopoulos (Comput. Vis. Image Underst., 2015)

A framework for gait-based recognition using Kinect. - Dimitris Kastaniotis; Ilias Theodorakopoulos; Christos Theoharatos; George Economou; Spiros Fotopoulos (Pattern Recognit. Lett., 2015)

Local manifold distance based on neighborhood graph reordering. - Ilias Theodorakopoulos; George Economou; Spiros Fotopoulos; Christos Theoharatos (Pattern Recognit., 2016)

Offline signature verification and quality characterization using poset-oriented grid features. - Elias N. Zois; Linda Alewijnse; George Economou (Pattern Recognit., 2016)

Gait based recognition via fusing information from Euclidean and Riemannian manifolds. - Dimitris Kastaniotis; Ilias Theodorakopoulos; George Economou; Spiros Fotopoulos (Pattern Recognit. Lett., 2016)

Parsimonious Coding and Verification of Offline Handwritten Signatures. - Elias N. Zois; Ilias Theodorakopoulos; Dimitrios Tsourounis; George Economou (CVPR Workshops, 2017)

Offline Handwritten Signature Modeling and Verification Based on Archetypal Analysis. - Elias N. Zois; Ilias Theodorakopoulos; George Economou (ICCV, 2017)

3D Shape Classification Using Collaborative Representation based Projections. - Fotini Fotopoulou; Spiros Oikonomou; A. Papathanasiou; George Economou; Spiros Fotopoulos (CoRR, 2017)

Long range correlation of preceded pixels relations and application to off-line signature verification. - Hans Loka; Elias N. Zois; George Economou (IET Biom., 2017)

HEp-2 cell classification with Vector of Hierarchically Aggregated Residuals. - Dimitris Kastaniotis; Fotini Fotopoulou; Ilias Theodorakopoulos; George Economou; Spiros Fotopoulos (Pattern Recognit., 2017)

Hierarchical Dictionary Learning and Sparse Coding for Static Signature Verification. - Elias N. Zois; Marianna Papagiannopoulou; Dimitrios Tsourounis; George Economou (CVPR Workshops, 2018)

Attention-Aware Generative Adversarial Networks (ATA-GANs). - Dimitris Kastaniotis; Ioanna Ntinou; Dimitrios Tsourounis; George Economou; Spiros Fotopoulos (IVMSP, 2018)

On the definition of shape parts: a dominant sets approach. - Fotini Fotopoulou; George Economou (Pattern Anal. Appl., 2018)

Sky Image forecasting with Generative Adversarial Networks for cloud coverage prediction. - George Andrianakos; Dimitrios Tsourounis; Spiros Oikonomou; Dimitris Kastaniotis; George Economou; Andreas Kazantzidis (IISA, 2019)

Writer independent offline signature verification based on asymmetric pixel relations and unrelated training-testing datasets. - Elias N. Zois; Alex Alexandridis; George Economou (Expert Syst. Appl., 2019)

3D shape classification with NNLS coding and optimal projections technique. - Fotini Fotopoulou; Spiros Oikonomou; George Economou (Multim. Tools Appl., 2019)

A Comprehensive Study of Sparse Representation Techniques for Offline Signature Verification. - Elias N. Zois; Dimitrios Tsourounis; Ilias Theodorakopoulos; Anastasios L. Kesidis; George Economou (IEEE Trans. Biom. Behav. Identity Sci., 2019)

Sequential Motif Profiles and Topological Plots for Offline Signature Verification. - Elias N. Zois; Evangelos Zervas; Dimitrios Tsourounis; George Economou (CVPR, 2020)

Local Manifold Regularization for Knowledge Transfer in Convolutional Neural Networks. - Ilias Theodorakopoulos; Foteini Fotopoulou; George Economou (IISA, 2020)

3D shape clustering with Nonnegative Least Squares coding and fusion on multilayer graphs. - Foteini Fotopoulou; George Economou (Multim. Tools Appl., 2020)

Semantic Information in Gating Patterns of Dynamic Convolutional Neural Networks. - Ilias Theodorakopoulos; George Economou (IISA, 2021)

Geometric Regularization of Local Activations for Knowledge Transfer in Convolutional Neural Networks. - Ilias Theodorakopoulos; Foteini Fotopoulou; George Economou (Inf., 2021)

From text to signatures: Knowledge transfer for efficient deep feature learning in offline signature verification. - Dimitrios Tsourounis; Ilias Theodorakopoulos; Elias N. Zois; George Economou (Expert Syst. Appl., 2022)

SIFT-CNN: When Convolutional Neural Networks Meet Dense SIFT Descriptors for Image and Sequence Classification. - Dimitrios Tsourounis; Dimitris Kastaniotis; Christos Theoharatos; Andreas Kazantzidis; George Economou (J. Imaging, 2022)

Automatic Extraction of Muscle Parameters with Attention UNet in Ultrasonography. - Sofoklis Katakis; Nikolaos Barotsis; Alexandros Kakotaritis; George Economou; Elias Panagiotopoulos; George Panayiotakis 001 (Sensors, 2022)

Leveraging Expert Models for Training Deep Neural Networks in Scarce Data Domains: Application to Offline Handwritten Signature Verification. - Dimitrios Tsourounis; Ilias Theodorakopoulos; Elias N. Zois; George Economou (CoRR, 2023)

A feature-based knowledge distillation (FKD) for offline signature feature learning without signatures. - Dimitrios Tsourounis; Ilias Theodorakopoulos; Elias N. Zois; George Economou (Expert Syst. Appl., 2026)