An Analytic Distance Metric for Gaussian Mixture Models with Application in Image Retrieval. - Giorgos Sfikas; Constantinos Constantinopoulos; Aristidis Likas; Nikolas P. Galatsanos (ICANN (2), 2005)

Robust Image Segmentation with Mixtures of Student's t-Distributions. - Giorgos Sfikas; Christophoros Nikou; Nikolas P. Galatsanos (ICIP (1), 2007)

Edge preserving spatially varying mixtures for image segmentation. - Giorgos Sfikas; Christophoros Nikou; Nikolas P. Galatsanos (CVPR, 2008)

MR Brain Tissue Classification Using an Edge-Preserving Spatially Variant Bayesian Mixture Model. - Giorgos Sfikas; Christophoros Nikou; Nikolas P. Galatsanos; Christian Heinrich (MICCAI (1), 2008)

Joint recovery and segmentation of polarimetric images using a compound MRF and mixture modeling. - Giorgos Sfikas; Christian Heinrich; Jihad Zallat; Christophoros Nikou; Nikolas P. Galatsanos (ICIP, 2009)

Multiple Atlas Inference and Population Analysis Using Spectral Clustering. - Giorgos Sfikas; Christian Heinrich; Christophoros Nikou (ICPR, 2010)

Spatially Varying Mixtures Incorporating Line Processes for Image Segmentation. - Giorgos Sfikas; Christophoros Nikou; Nikolas P. Galatsanos; Christian Heinrich (J. Math. Imaging Vis., 2010)

Majorization-minimization mixture model determination in image segmentation. - Giorgos Sfikas; Christophoros Nikou; Nikolas P. Galatsanos; Christian Heinrich (CVPR, 2011)

GRPOLY-DB: An old Greek polytonic document image database. - Basilis Gatos; Nikolaos Stamatopoulos; Georgios Louloudis; Giorgos Sfikas; George Retsinas; Vassilis Papavassiliou; Fotini Sunistira; Vassilis Katsouros (ICDAR, 2015)

Shape-based word spotting in handwritten document images. - Angelos P. Giotis; Giorgos Sfikas; Christophoros Nikou; Basilis Gatos (ICDAR, 2015)

Using attributes for word spotting and recognition in polytonic greek documents. - Giorgos Sfikas; Angelos P. Giotis; Georgios Louloudis; Basilis Gatos (ICDAR, 2015)

Word Segmentation Using the Student's-t Distribution. - Georgios Louloudis; Giorgos Sfikas; Nikolaos Stamatopoulos; Basilis Gatos (DAS, 2016)

Bayesian Mixture Models on Connected Components for Newspaper Article Segmentation. - Giorgos Sfikas; Georgios Louloudis; Nikolaos Stamatopoulos; Basilis Gatos (DocEng, 2016)

Zoning Aggregated Hypercolumns for Keyword Spotting. - Giorgos Sfikas; George Retsinas; Basilis Gatos (ICFHR, 2016)

Bayesian Multiview Manifold Learning Applied to Hippocampus Shape and Clinical Score Data. - Giorgos Sfikas; Christophoros Nikou (MCV/BAMBI@MICCAI, 2016)

Historical Document Processing. - Basilis Gatos; Georgios Louloudis; Nikolaos Stamatopoulos; Giorgos Sfikas (DocEng, 2017)

Transferable Deep Features for Keyword Spotting. - George Retsinas; Giorgos Sfikas; Basilis Gatos (IWCIM@EUSIPCO, 2017)

Nonlinear Manifold Embedding on Keyword Spotting Using t-SNE. - George Retsinas; Nikolaos Stamatopoulos; Georgios Louloudis; Giorgos Sfikas; Basilis Gatos (ICDAR, 2017)

A PHOC Decoder for Lexicon-Free Handwritten Word Recognition. - Giorgos Sfikas; George Retsinas; Basilis Gatos (ICDAR, 2017)

Semicca: A new semi-supervised probabilistic CCA model for keyword spotting. - Giorgos Sfikas; Basilis Gatos; Christophoros Nikou (ICIP, 2017)

A survey of document image word spotting techniques. - Angelos P. Giotis; Giorgos Sfikas; Basilis Gatos; Christophoros Nikou (Pattern Recognit., 2017)

Exploring Critical Aspects of CNN-based Keyword Spotting. A PHOCNet Study. - George Retsinas; Giorgos Sfikas; Nikolaos Stamatopoulos; Georgios Louloudis; Basilis Gatos (DAS, 2018)

Compact Deep Descriptors for Keyword Spotting. - George Retsinas; Giorgos Sfikas; Georgios Louloudis; Nikolaos Stamatopoulos; Basilis Gatos (ICFHR, 2018)

Sipakmed: A New Dataset for Feature and Image Based Classification of Normal and Pathological Cervical Cells in Pap Smear Images. - Marina E. Plissiti; Panagiotis Dimitrakopoulos; Giorgos Sfikas; Christophoros Nikou; O. Krikoni; Antonia Charchanti (ICIP, 2018)

Tomographic Image Reconstruction with a Spatially Varying Gamma Mixture Prior. - Katerina Papadimitriou; Giorgos Sfikas; Christophoros Nikou (J. Math. Imaging Vis., 2018)

Nuclei Detection Using Residual Attention Feature Pyramid Networks. - Panagiotis Dimitrakopoulos; Giorgos Sfikas; Christophoros Nikou (BIBE, 2019)

An Alternative Deep Feature Approach to Line Level Keyword Spotting. - George Retsinas; Georgios Louloudis; Nikolaos Stamatopoulos; Giorgos Sfikas; Basilis Gatos (CVPR, 2019)

Automatic Video Colorization Using 3D Conditional Generative Adversarial Networks. - Panagiotis Kouzouglidis; Giorgos Sfikas; Christophoros Nikou (ISVC (1), 2019)

Transforming scholarship in the archives through handwritten text recognition. - Günter Mühlberger; Louise Seaward; Melissa Terras; Sofia Ares Oliveira; Vicente Bosch; Maximilian Bryan; Sebastian Colutto; Hervé Déjean; Markus Diem; Stefan Fiel; Basilis Gatos; Albert Greinoecker; et al. (J. Documentation, 2019)

Wind: Wasserstein Inception Distance For Evaluating Generative Adversarial Network Performance. - Panagiotis Dimitrakopoulos; Giorgos Sfikas; Christophoros Nikou (ICASSP, 2020)

Quaternion Harris For Multispectral Keypoint Detection. - Giorgos Sfikas; Dimosthenis Ioannidis; Dimitrios Tzovaras (ICIP, 2020)

Salient Object Detection with Pretrained Deeplab and k-Means: Application to UAV-Captured Building Imagery. - Victor Megir; Giorgos Sfikas; Athanasios Mekras; Christophoros Nikou; Dimosthenis Ioannidis; Dimitrios Tzovaras (ICPR Workshops (7), 2020)

Quaternion Generative Adversarial Networks for Inscription Detection in Byzantine Monuments. - Giorgos Sfikas; Angelos P. Giotis; George Retsinas; Christophoros Nikou (ICPR Workshops (7), 2020)

ISING-GAN: Annotated Data Augmentation with a Spatially Constrained Generative Adversarial Network. - Panagiotis Dimitrakopoulos; Giorgos Sfikas; Christophoros Nikou (ISBI, 2020)

Quaternionic keypoint description for multispectral imaging. - Giorgos Sfikas; Dimosthenis Ioannidis; Dimitrios Tzovaras (SETN, 2020)

WSRNet: Joint Spotting and Recognition of Handwritten Words. - George Retsinas; Giorgos Sfikas; Petros Maragos (CoRR, 2020)

Markerless detection of ancient rock carvings in the wild: rock art in Vathy, Astypalaia. - Giorgos Tsigkas; Giorgos Sfikas; Anastasios Pasialis; Andreas Vlachopoulos; Christophoros Nikou (Pattern Recognit. Lett., 2020)

From Seq2Seq Recognition to Handwritten Word Embeddings. - George Retsinas; Giorgos Sfikas; Christophoros Nikou; Petros Maragos (BMVC, 2021)

Iterative Weighted Transductive Learning for Handwriting Recognition. - George Retsinas; Giorgos Sfikas; Christophoros Nikou (ICDAR (4), 2021)

Deformation-Invariant Networks For Handwritten Text Recognition. - George Retsinas; Giorgos Sfikas; Christophoros Nikou; Petros Maragos (ICIP, 2021)

Best Practices for a Handwritten Text Recognition System. - George Retsinas; Giorgos Sfikas; Basilis Gatos; Christophoros Nikou (DAS, 2022)

On-the-Fly Deformations for Keyword Spotting. - George Retsinas; Giorgos Sfikas; Basilis Gatos; Christophoros Nikou (DAS, 2022)

Keyword Spotting with Quaternionic ResNet: Application to Spotting in Greek Manuscripts. - Giorgos Sfikas; George Retsinas; Angelos P. Giotis; Basilis Gatos; Christophoros Nikou (DAS, 2022)

Variational Feature Pyramid Networks. - Panagiotis Dimitrakopoulos; Giorgos Sfikas; Christophoros Nikou (ICML, 2022)

Hypercomplex Generative Adversarial Networks for Lightweight Semantic Labeling. - Giorgos Sfikas; George Retsinas; Basilis Gatos; Christophoros Nikou (ICPRAI (1), 2022)

Adversarial deep features for weakly supervised document image keyword spotting. - Angelos P. Giotis; Giorgos Sfikas; Christophoros Nikou (IVMSP, 2022)

Road Crack Detection Using Quaternion Neural Networks. - Aggelos Katsaliros; Iason-Ioannis Panagos; Giorgos Sfikas; Christophoros Nikou (IVMSP, 2022)

Compressing Audio Visual Speech Recognition Models With Parameterized Hypercomplex Layers. - Iason-Ioannis Panagos; Giorgos Sfikas; Christophoros Nikou (SETN, 2022)

Newton-Based Trainable Learning Rate. - George Retsinas; Giorgos Sfikas; Panagiotis Paraskevas Filntisis; Petros Maragos (ICASSP, 2023)

WordStylist: Styled Verbatim Handwritten Text Generation with Latent Diffusion Models. - Konstantina Nikolaidou; George Retsinas; Vincent Christlein; Mathias Seuret; Giorgos Sfikas; Elisa Barney Smith; Hamam Mokayed; Marcus Liwicki (ICDAR (2), 2023)

Keyword Spotting Simplified: A Segmentation-Free Approach Using Character Counting and CTC Re-scoring. - George Retsinas; Giorgos Sfikas; Christophoros Nikou (ICDAR (1), 2023)

Shared-Operation Hypercomplex Networks for Handwritten Text Recognition. - Giorgos Sfikas; George Retsinas; Panagiotis Dimitrakopoulos; Basilis Gatos; Christophoros Nikou (ICDAR (4), 2023)

Document Binarization with Quaternionic Double Discriminator Generative Adversarial Network. - Giorgos Sfikas; George Retsinas; Basilis Gatos (ICDAR Workshops (2), 2023)

On the Matrix Form of the Quaternion Fourier Transform and Quaternion Convolution. - Giorgos Sfikas; George Retsinas (CoRR, 2023)

Bessarion: Medieval Greek Inscriptions on a Challenging Dataset for Vision and NLP Tasks. - Giorgos Sfikas; Panagiotis Dimitrakopoulos; George Retsinas; Christophoros Nikou; Pinelopi Kitsiou (DAS, 2024)

DiffusionPen: Towards Controlling the Style of Handwritten Text Generation. - Konstantina Nikolaidou; George Retsinas; Giorgos Sfikas; Marcus Liwicki (ECCV (85), 2024)

Rethinking HTG Evaluation: Bridging Generation and Recognition. - Konstantina Nikolaidou; George Retsinas; Giorgos Sfikas; Marcus Liwicki (ECCV Workshops (22), 2024)

Enhancing CRNN HTR Architectures with Transformer Blocks. - George Retsinas; Konstantina Nikolaidou; Giorgos Sfikas (ICDAR (4), 2024)

Implicit Neural Representation Inference for Low-Dimensional Bayesian Deep Learning. - Panagiotis Dimitrakopoulos; Giorgos Sfikas; Christophoros Nikou (ICLR, 2024)

Visual speech recognition using compact hypercomplex neural networks. - Iason-Ioannis Panagos; Giorgos Sfikas; Christophoros Nikou (Pattern Recognit. Lett., 2024)

A Novel Framework for Image Matching and Stitching for Moving Car Inspection under Illumination Challenges. - Andreas El Saer; Lazaros Grammatikopoulos; Giorgos Sfikas; George Karras; Elli Petsa (Sensors, 2024)

Lightweight Operations for Visual Speech Recognition. - Iason-Ioannis Panagos; Giorgos Sfikas; Christophoros Nikou (CoRR, 2025)

Quo Vadis Handwritten Text Generation for Handwritten Text Recognition? - Vittorio Pippi; Konstantina Nikolaidou; Silvia Cascianelli; George Retsinas; Giorgos Sfikas; Rita Cucchiara; Marcus Liwicki (CoRR, 2025)