Giorgos Sfikas

78 papers A* 5A 6B 17C 1Misc 2Journal 23Unranked 24

Year	Rank	Type	Title / Venue / Authors
2025	J	`jnl`	Are Euler angles a useful rotation parameterisation for pose estimation with Normalizing Flows? CoRR Giorgos Sfikas, Konstantina Nikolaidou, Foteini Papadopoulou, George Retsinas, Anastasios L. Kesidis
2025	J	`jnl`	Designing Practical Models for Isolated Word Visual Speech Recognition. CoRR Iason-Ioannis Panagos, Giorgos Sfikas, Christophoros Nikou
2025	—	`conf`	Dual Orthogonal Guidance for Robust Diffusion-Based Handwritten Text Generation. ICCVW Konstantina Nikolaidou, George Retsinas, Giorgos Sfikas, Silvia Cascianelli, Rita Cucchiara, Marcus Liwicki
2025	J	`jnl`	Dual Orthogonal Guidance for Robust Diffusion-based Handwritten Text Generation. CoRR Konstantina Nikolaidou, George Retsinas, Giorgos Sfikas, Silvia Cascianelli, Rita Cucchiara, Marcus Liwicki
2025	J	`jnl`	Lightweight Operations for Visual Speech Recognition. CoRR Iason-Ioannis Panagos, Giorgos Sfikas, Christophoros Nikou
2025	J	`jnl`	Optimal Transport for Handwritten Text Recognition in a Low-Resource Regime. CoRR Petros Georgoulas Wraight, Giorgos Sfikas, Ioannis Kordonis, Petros Maragos, George Retsinas
2025	—	`conf`	Quo Vadis Handwritten Text Generation for Handwritten Text Recognition? ICCVW Vittorio Pippi, Konstantina Nikolaidou, Silvia Cascianelli, George Retsinas, Giorgos Sfikas, Rita Cucchiara, Marcus Liwicki
2025	J	`jnl`	Quo Vadis Handwritten Text Generation for Handwritten Text Recognition? CoRR Vittorio Pippi, Konstantina Nikolaidou, Silvia Cascianelli, George Retsinas, Giorgos Sfikas, Rita Cucchiara, Marcus Liwicki
2025	J	`jnl`	REGLUE Your Latents with Global and Local Semantics for Entangled Diffusion. CoRR Giorgos Petsangourakis, Christos Sgouropoulos, Bill Psomas, Theodoros Giannakopoulos, Giorgos Sfikas, Ioannis Kakogeorgiou
2025	J	`jnl`	Unlocking the matrix form of the Quaternion Fourier Transform and Quaternion Convolution: Properties, connections, and application to Lipschitz constant bounding. Trans. Mach. Learn. Res. Giorgos Sfikas, George Retsinas
2024	J	`jnl`	A Novel Framework for Image Matching and Stitching for Moving Car Inspection under Illumination Challenges. Sensors Andreas El Saer, Lazaros Grammatikopoulos, Giorgos Sfikas, George C. Karras, Elli Petsa
2024	B	`conf`	Bessarion: Medieval Greek Inscriptions on a Challenging Dataset for Vision and NLP Tasks. DAS Giorgos Sfikas, Panagiotis Dimitrakopoulos, George Retsinas, Christophoros Nikou, Pinelopi Kitsiou
2024	J	`jnl`	Best Practices for a Handwritten Text Recognition System. CoRR George Retsinas, Giorgos Sfikas, Basilis Gatos, Christophoros Nikou
2024	—	`conf`	DiffusionPen: Towards Controlling the Style of Handwritten Text Generation. ECCV (85) Konstantina Nikolaidou, George Retsinas, Giorgos Sfikas, Marcus Liwicki
2024	J	`jnl`	DiffusionPen: Towards Controlling the Style of Handwritten Text Generation. CoRR Konstantina Nikolaidou, George Retsinas, Giorgos Sfikas, Marcus Liwicki
2024	B	`ed.`	Document Analysis Systems - 16th IAPR International Workshop, DAS 2024, Athens, Greece, August 30-31, 2024, Proceedings DAS Giorgos Sfikas, George Retsinas
2024	—	`conf`	Enhancing CRNN HTR Architectures with Transformer Blocks. ICDAR (4) George Retsinas, Konstantina Nikolaidou, Giorgos Sfikas
2024	A*	`conf`	Implicit Neural Representation Inference for Low-Dimensional Bayesian Deep Learning. ICLR Panagiotis Dimitrakopoulos, Giorgos Sfikas, Christophoros Nikou
2024	—	`conf`	Rethinking HTG Evaluation: Bridging Generation and Recognition. ECCV Workshops (22) Konstantina Nikolaidou, George Retsinas, Giorgos Sfikas, Marcus Liwicki
2024	J	`jnl`	Rethinking HTG Evaluation: Bridging Generation and Recognition. CoRR Konstantina Nikolaidou, George Retsinas, Giorgos Sfikas, Marcus Liwicki
2024	J	`jnl`	Visual speech recognition using compact hypercomplex neural networks. Pattern Recognit. Lett. Iason-Ioannis Panagos, Giorgos Sfikas, Christophoros Nikou
2023	—	`conf`	Document Binarization with Quaternionic Double Discriminator Generative Adversarial Network. ICDAR Workshops (2) Giorgos Sfikas, George Retsinas, Basilis Gatos
2023	—	`conf`	Keyword Spotting Simplified: A Segmentation-Free Approach Using Character Counting and CTC Re-scoring. ICDAR (1) George Retsinas, Giorgos Sfikas, Christophoros Nikou
2023	J	`jnl`	Keyword Spotting Simplified: A Segmentation-Free Approach using Character Counting and CTC re-scoring. CoRR George Retsinas, Giorgos Sfikas, Christophoros Nikou
2023	Misc	`conf`	Newton-Based Trainable Learning Rate. ICASSP George Retsinas, Giorgos Sfikas, Panagiotis Paraskevas Filntisis, Petros Maragos
2023	J	`jnl`	On the Matrix Form of the Quaternion Fourier Transform and Quaternion Convolution. CoRR Giorgos Sfikas, George Retsinas
2023	—	`conf`	Shared-Operation Hypercomplex Networks for Handwritten Text Recognition. ICDAR (4) Giorgos Sfikas, George Retsinas, Panagiotis Dimitrakopoulos, Basilis Gatos, Christophoros Nikou
2023	—	`conf`	WordStylist: Styled Verbatim Handwritten Text Generation with Latent Diffusion Models. ICDAR (2) Konstantina Nikolaidou, George Retsinas, Vincent Christlein, Mathias Seuret, Giorgos Sfikas, Elisa Barney Smith, Hamam Mokayed, Marcus Liwicki
2023	J	`jnl`	WordStylist: Styled Verbatim Handwritten Text Generation with Latent Diffusion Models. CoRR Konstantina Nikolaidou, George Retsinas, Vincent Christlein, Mathias Seuret, Giorgos Sfikas, Elisa Barney Smith, Hamam Mokayed, Marcus Liwicki
2022	—	`conf`	Adversarial deep features for weakly supervised document image keyword spotting. IVMSP Angelos P. Giotis, Giorgos Sfikas, Christophoros Nikou
2022	B	`conf`	Best Practices for a Handwritten Text Recognition System. DAS George Retsinas, Giorgos Sfikas, Basilis Gatos, Christophoros Nikou
2022	—	`conf`	Compressing Audio Visual Speech Recognition Models With Parameterized Hypercomplex Layers. SETN Iason-Ioannis Panagos, Giorgos Sfikas, Christophoros Nikou
2022	—	`conf`	Hypercomplex Generative Adversarial Networks for Lightweight Semantic Labeling. ICPRAI (1) Giorgos Sfikas, George Retsinas, Basilis Gatos, Christophoros Nikou
2022	B	`conf`	Keyword Spotting with Quaternionic ResNet: Application to Spotting in Greek Manuscripts. DAS Giorgos Sfikas, George Retsinas, Angelos P. Giotis, Basilis Gatos, Christophoros Nikou
2022	B	`conf`	On-the-Fly Deformations for Keyword Spotting. DAS George Retsinas, Giorgos Sfikas, Basilis Gatos, Christophoros Nikou
2022	—	`conf`	Road Crack Detection Using Quaternion Neural Networks. IVMSP Aggelos Katsaliros, Iason-Ioannis Panagos, Giorgos Sfikas, Christophoros Nikou
2022	A*	`conf`	Variational Feature Pyramid Networks. ICML Panagiotis Dimitrakopoulos, Giorgos Sfikas, Christophoros Nikou
2021	B	`conf`	Deformation-Invariant Networks For Handwritten Text Recognition. ICIP George Retsinas, Giorgos Sfikas, Christophoros Nikou, Petros Maragos
2021	A	`conf`	From Seq2Seq Recognition to Handwritten Word Embeddings. BMVC George Retsinas, Giorgos Sfikas, Christophoros Nikou, Petros Maragos
2021	—	`conf`	Iterative Weighted Transductive Learning for Handwriting Recognition. ICDAR (4) George Retsinas, Giorgos Sfikas, Christophoros Nikou
2020	—	`conf`	ISING-GAN: Annotated Data Augmentation with a Spatially Constrained Generative Adversarial Network. ISBI Panagiotis Dimitrakopoulos, Giorgos Sfikas, Christophoros Nikou
2020	J	`jnl`	Markerless detection of ancient rock carvings in the wild: rock art in Vathy, Astypalaia. Pattern Recognit. Lett. Giorgos Tsigkas, Giorgos Sfikas, Anastasios Pasialis, Andreas Vlachopoulos, Christophoros Nikou
2020	—	`conf`	Quaternion Generative Adversarial Networks for Inscription Detection in Byzantine Monuments. ICPR Workshops (7) Giorgos Sfikas, Angelos P. Giotis, George Retsinas, Christophoros Nikou
2020	B	`conf`	Quaternion Harris For Multispectral Keypoint Detection. ICIP Giorgos Sfikas, Dimosthenis Ioannidis, Dimitrios Tzovaras
2020	—	`conf`	Quaternionic keypoint description for multispectral imaging. SETN Giorgos Sfikas, Dimosthenis Ioannidis, Dimitrios Tzovaras
2020	—	`conf`	Salient Object Detection with Pretrained Deeplab and k-Means: Application to UAV-Captured Building Imagery. ICPR Workshops (7) Victor Megir, Giorgos Sfikas, Athanasios Mekras, Christophoros Nikou, Dimosthenis Ioannidis, Dimitrios Tzovaras
2020	J	`jnl`	WSRNet: Joint Spotting and Recognition of Handwritten Words. CoRR George Retsinas, Giorgos Sfikas, Petros Maragos
2020	Misc	`conf`	Wind: Wasserstein Inception Distance For Evaluating Generative Adversarial Network Performance. ICASSP Panagiotis Dimitrakopoulos, Giorgos Sfikas, Christophoros Nikou
2019	A*	`conf`	An Alternative Deep Feature Approach to Line Level Keyword Spotting. CVPR George Retsinas, Georgios Louloudis, Nikolaos Stamatopoulos, Giorgos Sfikas, Basilis Gatos
2019	—	`conf`	Automatic Video Colorization Using 3D Conditional Generative Adversarial Networks. ISVC (1) Panagiotis Kouzouglidis, Giorgos Sfikas, Christophoros Nikou
2019	J	`jnl`	Automatic Video Colorization using 3D Conditional Generative Adversarial Networks. CoRR Panagiotis Kouzouglidis, Giorgos Sfikas, Christophoros Nikou
2019	C	`conf`	Nuclei Detection Using Residual Attention Feature Pyramid Networks. BIBE Panagiotis Dimitrakopoulos, Giorgos Sfikas, Christophoros Nikou
2019	J	`jnl`	Transforming scholarship in the archives through handwritten text recognition. J. Documentation 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, Tobias Grüning, Günter Hackl, Vili Haukkovaara, Gerhard Heyer, Lauri Hirvonen, Tobias Hodel, Matti Jokinen, Philip Kahle, Mario Kallio, Frédéric Kaplan, Florian Kleber, Roger Labahn, Eva Maria Lang, Sören Laube, Gundram Leifert, Georgios Louloudis, Rory McNicholl, Jean-Luc Meunier, Johannes Michael, Elena Mühlbauer, Nathanael Philipp, Ioannis Pratikakis, Joan Puigcerver Pérez, Hannelore Putz, George Retsinas, Verónica Romero, Robert Sablatnig, Joan-Andreu Sánchez, Philip Schofield, Giorgos Sfikas, Christian Sieber, Nikolaos Stamatopoulos, Tobias Strauß, Tamara Terbul, Alejandro H. Toselli, Berthold Ulreich, Mauricio Villegas, Enrique Vidal, Johanna Walcher, Max Weidemann, Herbert Wurster, Konstantinos Zagoris
2018	B	`conf`	Compact Deep Descriptors for Keyword Spotting. ICFHR George Retsinas, Giorgos Sfikas, Georgios Louloudis, Nikolaos Stamatopoulos, Basilis Gatos
2018	B	`conf`	Exploring Critical Aspects of CNN-based Keyword Spotting. A PHOCNet Study. DAS George Retsinas, Giorgos Sfikas, Nikolaos Stamatopoulos, Georgios Louloudis, Basilis Gatos
2018	B	`conf`	Sipakmed: A New Dataset for Feature and Image Based Classification of Normal and Pathological Cervical Cells in Pap Smear Images. ICIP Marina E. Plissiti, Panagiotis Dimitrakopoulos, Giorgos Sfikas, Christophoros Nikou, O. Krikoni, Antonia Charchanti
2018	J	`jnl`	Tomographic Image Reconstruction with a Spatially Varying Gamma Mixture Prior. J. Math. Imaging Vis. Katerina Papadimitriou, Giorgos Sfikas, Christophoros Nikou
2017	A	`conf`	A PHOC Decoder for Lexicon-Free Handwritten Word Recognition. ICDAR Giorgos Sfikas, George Retsinas, Basilis Gatos
2017	J	`jnl`	A survey of document image word spotting techniques. Pattern Recognit. Angelos P. Giotis, Giorgos Sfikas, Basilis Gatos, Christophoros Nikou
2017	B	`conf`	Historical Document Processing. DocEng Basilis Gatos, Georgios Louloudis, Nikolaos Stamatopoulos, Giorgos Sfikas
2017	A	`conf`	Nonlinear Manifold Embedding on Keyword Spotting Using t-SNE. ICDAR George Retsinas, Nikolaos Stamatopoulos, Georgios Louloudis, Giorgos Sfikas, Basilis Gatos
2017	B	`conf`	Semicca: A new semi-supervised probabilistic CCA model for keyword spotting. ICIP Giorgos Sfikas, Basilis Gatos, Christophoros Nikou
2017	—	`conf`	Transferable Deep Features for Keyword Spotting. IWCIM@EUSIPCO George Retsinas, Giorgos Sfikas, Basilis Gatos
2016	B	`conf`	Bayesian Mixture Models on Connected Components for Newspaper Article Segmentation. DocEng Giorgos Sfikas, Georgios Louloudis, Nikolaos Stamatopoulos, Basilis Gatos
2016	—	`conf`	Bayesian Multiview Manifold Learning Applied to Hippocampus Shape and Clinical Score Data. MCV/BAMBI@MICCAI Giorgos Sfikas, Christophoros Nikou
2016	B	`conf`	Word Segmentation Using the Student's-t Distribution. DAS Georgios Louloudis, Giorgos Sfikas, Nikolaos Stamatopoulos, Basilis Gatos
2016	B	`conf`	Zoning Aggregated Hypercolumns for Keyword Spotting. ICFHR Giorgos Sfikas, George Retsinas, Basilis Gatos
2015	A	`conf`	GRPOLY-DB: An old Greek polytonic document image database. ICDAR Basilis Gatos, Nikolaos Stamatopoulos, Georgios Louloudis, Giorgos Sfikas, George Retsinas, Vassilis Papavassiliou, Fotini Sunistira, Vassilis Katsouros
2015	A	`conf`	Shape-based word spotting in handwritten document images. ICDAR Angelos P. Giotis, Giorgos Sfikas, Christophoros Nikou, Basilis Gatos
2015	A	`conf`	Using attributes for word spotting and recognition in polytonic greek documents. ICDAR Giorgos Sfikas, Angelos P. Giotis, Georgios Louloudis, Basilis Gatos
2011	A*	`conf`	Majorization-minimization mixture model determination in image segmentation. CVPR Giorgos Sfikas, Christophoros Nikou, Nikolas P. Galatsanos, Christian Heinrich
2010	B	`conf`	Multiple Atlas Inference and Population Analysis Using Spectral Clustering. ICPR Giorgos Sfikas, Christian Heinrich, Christophoros Nikou
2010	J	`jnl`	Spatially Varying Mixtures Incorporating Line Processes for Image Segmentation. J. Math. Imaging Vis. Giorgos Sfikas, Christophoros Nikou, Nikolas P. Galatsanos, Christian Heinrich
2009	B	`conf`	Joint recovery and segmentation of polarimetric images using a compound MRF and mixture modeling. ICIP Giorgos Sfikas, Christian Heinrich, Jihad Zallat, Christophoros Nikou, Nikolas P. Galatsanos
2008	A*	`conf`	Edge preserving spatially varying mixtures for image segmentation. CVPR Giorgos Sfikas, Christophoros Nikou, Nikolas P. Galatsanos
2008	—	`conf`	MR Brain Tissue Classification Using an Edge-Preserving Spatially Variant Bayesian Mixture Model. MICCAI (1) Giorgos Sfikas, Christophoros Nikou, Nikolas P. Galatsanos, Christian Heinrich
2007	—	`conf`	Robust Image Segmentation with Mixtures of Student's t-Distributions. ICIP (1) Giorgos Sfikas, Christophoros Nikou, Nikolas P. Galatsanos
2005	—	`conf`	An Analytic Distance Metric for Gaussian Mixture Models with Application in Image Retrieval. ICANN (2) Giorgos Sfikas, Constantinos Constantinopoulos, Aristidis Likas, Nikolas P. Galatsanos