publications

2026

1. MOCHI: Registration-Free Learnable Multi-View Capture of Faces in Dense Semantic Correspondence

   Panagiotis P. Filntisis, George Retsinas, Radek Danecek, Vanessa Sklyarova, Petros Maragos,  and Timo Bolkart

   CVPR 2026

   PDF Website

   @inproceedings{filntisis2026mochi,
     title = {MOCHI: Registration-Free Learnable Multi-View Capture of Faces in Dense Semantic Correspondence},
     author = {Filntisis, Panagiotis P. and Retsinas, George and Danecek, Radek and Sklyarova, Vanessa and Maragos, Petros and Bolkart, Timo},
     booktitle = {Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR)},
     year = {2026},
   }

2. VGGT-HPE: Reframing Head Pose Estimation as Relative Pose Prediction

   Vasiliki Vasileiou,  Panagiotis P. Filntisis, Petros Maragos,  and Kostas Daniilidis

   CVPR-W 2026

   PDF Website

   @inproceedings{vasileiou2026vggthpe,
     title = {VGGT-HPE: Reframing Head Pose Estimation as Relative Pose Prediction},
     author = {Vasileiou, Vasiliki and Filntisis, Panagiotis P. and Maragos, Petros and Daniilidis, Kostas},
     booktitle = {CVPR-W (ABAW Workshop)},
     year = {2026},
     url = {https://vasilikivas.github.io/VGGT-HPE/},
   }

2022

1. Neural Emotion Director: Speech-preserving semantic control of facial expressions in "in-the-wild" videos

   Foivos Paraperas Papantoniou,  Panagiotis P. Filntisis, Petros Maragos,  and Anastasios Roussos

   CVPR 2022

   PDF Code Website

   @inproceedings{paraperas2022ned,
     title = {Neural Emotion Director: Speech-preserving semantic control of facial expressions in "in-the-wild" videos},
     author = {Paraperas Papantoniou, Foivos and Filntisis, Panagiotis P. and Maragos, Petros and Roussos, Anastasios},
     booktitle = {Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR) (Oral - Best Paper Finalist)},
     year = {2022},
   }

2. Childbot: Multi-robot perception and interaction with children

   Niki Efthymiou,  Panagiotis P. Filntisis, Petros Koutras, Antigoni Tsiami, Jack Hadfield, Gerasimos Potamianos,  and Petros Maragos

   Robotics and Autonomous Systems 2022

   PDF

   @article{efthymiou2022childbot,
     title = {Childbot: Multi-robot perception and interaction with children},
     author = {Efthymiou, Niki and Filntisis, Panagiotis P. and Koutras, Petros and Tsiami, Antigoni and Hadfield, Jack and Potamianos, Gerasimos and Maragos, Petros},
     journal = {Robotics and Autonomous Systems},
     volume = {150},
     pages = {103975},
     year = {2022},
     publisher = {North-Holland},
   }

3. Towards unsupervised subject-independent speech-based relapse detection in patients with psychosis using variational autoencoders

   Christos Garoufis, Athanasia Zlatintsi,  Panagiotis P. Filntisis, Niki Efthymiou, Emmanouil Kalisperakis, Vassiliki Garyfalli, Marina Lazaridi, Nikolaos Smyrnis,  and Petros Maragos

   EUSIPCO 2022

   @inproceedings{garoufis2022towards,
     author = {Garoufis, Christos and Zlatintsi, Athanasia and Filntisis, Panagiotis P. and Efthymiou, Niki and Kalisperakis, Emmanouil and Garyfalli, Vassiliki and Lazaridi, Marina and Smyrnis, Nikolaos and Maragos, Petros},
     booktitle = {European Signal Processing Conference (EUSIPCO)},
     pages = {To Appear},
     year = {2022},
     organization = {IEEE},
   }

4. A comparative study of autoencoder architectures for mental health analysis using wearable sensors data

   Maria Panagiotou, Athanasia Zlatintsi,  Panagiotis P. Filntisis, Argyris Roumeliotis, Niki Efthymiou,  and Petros Maragos

   EUSIPCO 2022

   @inproceedings{panagiotou2022,
     author = {Panagiotou, Maria and Zlatintsi, Athanasia and Filntisis, Panagiotis P. and Roumeliotis, Argyris and Efthymiou, Niki and Maragos, Petros},
     booktitle = {European Signal Processing Conference (EUSIPCO)},
     pages = {To Appear},
     year = {2022},
     organization = {IEEE},
   }

5. Cartoonized Anonymization of Sign Language Videos

   Christina Ourania Tze,  Panagiotis P. Filntisis, Anastasios Roussos,  and Petros Maragos

   Image, Video, and Multidimensional Signal Processing Workshop (IVMSP) 2022

   @inproceedings{tze2022cartoon,
     title = {Cartoonized Anonymization of Sign Language Videos},
     author = {Tze, Christina Ourania and Filntisis, Panagiotis P. and Roussos, Anastasios and Maragos, Petros},
     booktitle = {Image, Video, and Multidimensional Signal Processing Workshop (IVMSP)},
     pages = {To Appear},
     year = {2022},
     organization = {IEEE},
   }

6. Attribute-based Gesture Recognition: Generalization to Unseen Classes

   Georgios Retsinas,  Panagiotis P. Filntisis, Nikolaos Kardaris,  and Petros Maragos

   Image, Video, and Multidimensional Signal Processing Workshop (IVMSP) 2022

   @inproceedings{retsinas2022attr,
     title = {Attribute-based Gesture Recognition: Generalization to Unseen Classes},
     author = {Retsinas, Georgios and Filntisis, Panagiotis P. and Kardaris, Nikolaos and Maragos, Petros},
     booktitle = {Image, Video, and Multidimensional Signal Processing Workshop (IVMSP)},
     pages = {To Appear},
     year = {2022},
     organization = {IEEE},
   }

2021

1. An Audiovisual Child Emotion Recognition System for Child-Robot Interaction Applications

   Panagiotis P. Filntisis, Niki Efthymiou, Gerasimos Potamianos,  and Petros Maragos

   EUSIPCO 2021

   PDF Code

   @inproceedings{filntisis2021audiovisual,
     title = {An Audiovisual Child Emotion Recognition System for Child-Robot Interaction Applications},
     author = {Filntisis, Panagiotis P. and Efthymiou, Niki and Potamianos, Gerasimos and Maragos, Petros},
     booktitle = {European Signal Processing Conference (EUSIPCO)},
     pages = {791--795},
     year = {2021},
     organization = {IEEE},
   }

2. Leveraging semantic scene characteristics and multi-stream convolutional architectures in a contextual approach for video-based visual emotion recognition in the wild

   Ioannis Pikoulis,  Panagiotis P. Filntisis,  and Petros Maragos

   FG 2021

   PDF Code

   @inproceedings{pikoulis2021leveraging,
     title = {Leveraging semantic scene characteristics and multi-stream convolutional architectures in a contextual approach for video-based visual emotion recognition in the wild},
     author = {Pikoulis, Ioannis and Filntisis, Panagiotis P. and Maragos, Petros},
     booktitle = {IEEE International Conference on Automatic Face and Gesture Recognition (FG 2021)},
     pages = {01--08},
     year = {2021},
     organization = {IEEE},
   }

3. Exploiting emotional dependencies with graph convolutional networks for facial expression recognition

   Panagiotis Antoniadis,  Panagiotis P. Filntisis,  and Petros Maragos

   FG 2021

   PDF Code

   @inproceedings{antoniadis2021exploiting,
     title = {Exploiting emotional dependencies with graph convolutional networks for facial expression recognition},
     author = {Antoniadis, Panagiotis and Filntisis, Panagiotis P. and Maragos, Petros},
     booktitle = {IEEE International Conference on Automatic Face and Gesture Recognition (FG 2021)},
     pages = {1--8},
     year = {2021},
     organization = {IEEE},
   }

4. A robotic edutainment framework for designing child-robot interaction scenarios

   Niki Efthymiou,  Panagiotis P. Filntisis, Gerasimos Potamianos,  and Petros Maragos

   PETRA 2021

   PDF

   @inproceedings{efthymiou2021robotic,
     title = {A robotic edutainment framework for designing child-robot interaction scenarios},
     author = {Efthymiou, Niki and Filntisis, Panagiotis P. and Potamianos, Gerasimos and Maragos, Petros},
     booktitle = {PErvasive Technologies Related to Assistive Environments Conference (PETRA)},
     pages = {160--166},
     year = {2021},
   }

5. An audiovisual and contextual approach for categorical and continuous emotion recognition in-the-wild

   Panagiotis Antoniadis, Ioannis Pikoulis,  Panagiotis P. Filntisis,  and Petros Maragos

   CVPR-W 2021

   Code

   @inproceedings{antoniadis2021audiovisual,
     title = {An audiovisual and contextual approach for categorical and continuous emotion recognition in-the-wild},
     author = {Antoniadis, Panagiotis and Pikoulis, Ioannis and Filntisis, Panagiotis P. and Maragos, Petros},
     booktitle = {Proceedings of the IEEE/CVF International Conference on Computer Vision Workshops (CVPRW)},
     pages = {3645--3651},
     year = {2021},
   }

6. An Unsupervised Learning Approach for Detecting Relapses from Spontaneous Speech in Patients with Psychosis

   C Garoufis, A Zlatintsi, PP Filntisis, N Efthymiou, E Kalisperakis, V Garyfalli, T Karantinos, L Mantonakis, N Smyrnis,  and P Maragos

   IEEE EMBS International Conference on Biomedical and Health Informatics (BHI) 2021

   PDF

   @inproceedings{garoufis2021unsupervised,
     title = {An Unsupervised Learning Approach for Detecting Relapses from Spontaneous Speech in Patients with Psychosis},
     author = {Garoufis, C and Zlatintsi, A and Filntisis, PP and Efthymiou, N and Kalisperakis, E and Garyfalli, V and Karantinos, T and Mantonakis, L and Smyrnis, N and Maragos, P},
     booktitle = {IEEE EMBS International Conference on Biomedical and Health Informatics (BHI)},
     pages = {1--5},
     year = {2021},
     organization = {IEEE},
   }

7. Visual Robotic Perception System with Incremental Learning for Child–Robot Interaction Scenarios

   Niki Efthymiou,  Panagiotis P. Filntisis, Gerasimos Potamianos,  and Petros Maragos

   Technologies 2021

   PDF

   @article{efthymiou2021visual,
     title = {Visual Robotic Perception System with Incremental Learning for Child--Robot Interaction Scenarios},
     author = {Efthymiou, Niki and Filntisis, Panagiotis P. and Potamianos, Gerasimos and Maragos, Petros},
     journal = {Technologies},
     volume = {9},
     number = {4},
     pages = {86},
     year = {2021},
     publisher = {Multidisciplinary Digital Publishing Institute},
   }

2020

1. Emotion understanding in videos through body, context, and visual-semantic embedding loss

   Panagiotis P. Filntisis, Niki Efthymiou, Gerasimos Potamianos,  and Petros Maragos

   ECCV-W 2020

   PDF Code

   @inproceedings{filntisis2020emotion,
     title = {Emotion understanding in videos through body, context, and visual-semantic embedding loss},
     author = {Filntisis, Panagiotis P. and Efthymiou, Niki and Potamianos, Gerasimos and Maragos, Petros},
     booktitle = {European Conference on Computer Vision Workshops (ECCVW)},
     pages = {747--755},
     year = {2020},
     organization = {Springer, Cham},
     note = {Challenge Winner!}
   }

2. Person identification using deep convolutional neural networks on short-term signals from wearable sensors

   George Retsinas,  Panagiotis P. Filntisis, Niki Efthymiou, Emmanouil Theodosis, Athanasia Zlatintsi,  and Petros Maragos

   ICASSP 2020

   PDF

   @inproceedings{retsinas2020person,
     title = {Person identification using deep convolutional neural networks on short-term signals from wearable sensors},
     author = {Retsinas, George and Filntisis, Panagiotis P. and Efthymiou, Niki and Theodosis, Emmanouil and Zlatintsi, Athanasia and Maragos, Petros},
     booktitle = {IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)},
     pages = {3657--3661},
     year = {2020},
     organization = {IEEE},
   }

3. An intelligent cloud-based platform for effective monitoring of patients with psychotic disorders

   Ilias Maglogiannis, Athanasia Zlatintsi, Andreas Menychtas, Dennis Papadimatos,  Panagiotis P. Filntisis, Niki Efthymiou, George Retsinas, Panayiotis Tsanakas,  and Petros Maragos

   IFIP International Conference on Artificial Intelligence Applications and Innovations 2020

   PDF

   @inproceedings{maglogiannis2020intelligent,
     title = {An intelligent cloud-based platform for effective monitoring of patients with psychotic disorders},
     author = {Maglogiannis, Ilias and Zlatintsi, Athanasia and Menychtas, Andreas and Papadimatos, Dennis and Filntisis, Panagiotis P. and Efthymiou, Niki and Retsinas, George and Tsanakas, Panayiotis and Maragos, Petros},
     booktitle = {IFIP International Conference on Artificial Intelligence Applications and Innovations},
     pages = {293--307},
     year = {2020},
     organization = {Springer, Cham},
   }

4. Identifying differences in physical activity and autonomic function patterns between psychotic patients and controls over a long period of continuous monitoring using wearable sensors

   Panagiotis P. Filntisis, Athanasia Zlatintsi, Niki Efthymiou, Emmanouil Kalisperakis, Thomas Karantinos, Marina Lazaridi, Nikolaos Smyrnis,  and Petros Maragos

   arXiv preprint arXiv:2011.02285 2020

   PDF

   @article{filntisis2020identifying,
     title = {Identifying differences in physical activity and autonomic function patterns between psychotic patients and controls over a long period of continuous monitoring using wearable sensors},
     author = {Filntisis, Panagiotis P. and Zlatintsi, Athanasia and Efthymiou, Niki and Kalisperakis, Emmanouil and Karantinos, Thomas and Lazaridi, Marina and Smyrnis, Nikolaos and Maragos, Petros},
     journal = {arXiv preprint arXiv:2011.02285},
     year = {2020},
   }

2019

1. Fusing body posture with facial expressions for joint recognition of affect in child–robot interaction

   Panagiotis P. Filntisis, Niki Efthymiou, Petros Koutras, Gerasimos Potamianos,  and Petros Maragos

   IEEE Robotics and Automation Letters 2019

   PDF Code

   @article{filntisis2019fusing,
     title = {Fusing body posture with facial expressions for joint recognition of affect in child--robot interaction},
     author = {Filntisis, Panagiotis P. and Efthymiou, Niki and Koutras, Petros and Potamianos, Gerasimos and Maragos, Petros},
     journal = {IEEE Robotics and Automation Letters},
     volume = {4},
     number = {4},
     pages = {4011--4018},
     year = {2019},
     publisher = {IEEE},
   }

2. An environment for gestural interaction with 3d virtual musical instruments as an educational tool

   Christos Garoufis, Athanasia Zlatintsi, Kosmas Kritsis,  Panagiotis P. Filntisis, Vassilis Katsouros,  and Petros Maragos

   EUSIPCO 2019

   PDF

   @inproceedings{garoufis2019environment,
     title = {An environment for gestural interaction with 3d virtual musical instruments as an educational tool},
     author = {Garoufis, Christos and Zlatintsi, Athanasia and Kritsis, Kosmas and Filntisis, Panagiotis P. and Katsouros, Vassilis and Maragos, Petros},
     booktitle = {European Signal Processing Conference (EUSIPCO)},
     pages = {1--5},
     year = {2019},
     organization = {IEEE},
   }

2018

1. Far-field audio-visual scene perception of multi-party human-robot interaction for children and adults

   Antigoni Tsiami,  Panagiotis P. Filntisis, Niki Efthymiou, Petros Koutras, Gerasimos Potamianos,  and Petros Maragos

   ICASSP 2018

   PDF

   @inproceedings{tsiami2018far,
     title = {Far-field audio-visual scene perception of multi-party human-robot interaction for children and adults},
     author = {Tsiami, Antigoni and Filntisis, Panagiotis P. and Efthymiou, Niki and Koutras, Petros and Potamianos, Gerasimos and Maragos, Petros},
     booktitle = {IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)},
     pages = {6568--6572},
     year = {2018},
     organization = {IEEE},
   }

2. Multi-view fusion for action recognition in child-robot interaction

   Niki Efthymiou, Petros Koutras,  Panagiotis P. Filntisis, Gerasimos Potamianos,  and Petros Maragos

   IEEE International Conference on Image Processing (ICIP) 2018

   PDF

   @inproceedings{efthymiou2018multi,
     title = {Multi-view fusion for action recognition in child-robot interaction},
     author = {Efthymiou, Niki and Koutras, Petros and Filntisis, Panagiotis P. and Potamianos, Gerasimos and Maragos, Petros},
     booktitle = {IEEE International Conference on Image Processing (ICIP)},
     pages = {455--459},
     year = {2018},
     organization = {IEEE},
   }

3. Multi3: Multi-sensory perception system for multi-modal child interaction with multiple robots

   Antigoni Tsiami, Petros Koutras, Niki Efthymiou,  Panagiotis P. Filntisis, Gerasimos Potamianos,  and Petros Maragos

   ICRA 2018

   PDF

   @inproceedings{tsiami2018multi3,
     title = {Multi3: Multi-sensory perception system for multi-modal child interaction with multiple robots},
     author = {Tsiami, Antigoni and Koutras, Petros and Efthymiou, Niki and Filntisis, Panagiotis P. and Potamianos, Gerasimos and Maragos, Petros},
     booktitle = {IEEE International Conference on Robotics and Automation (ICRA)},
     pages = {4585--4592},
     year = {2018},
     organization = {IEEE},
   }

4. A web-based real-time kinect application for gestural interaction with virtual musical instruments

   Athanasia Zlatintsi,  Panagiotis P. Filntisis, Christos Garoufis, Antigoni Tsiami, Kosmas Kritsis, Maximos A Kaliakatsos-Papakostas, Aggelos Gkiokas, Vassilis Katsouros,  and Petros Maragos

   2018

   PDF

   @incollection{zlatintsi2018web,
     title = {A web-based real-time kinect application for gestural interaction with virtual musical instruments},
     author = {Zlatintsi, Athanasia and Filntisis, Panagiotis P. and Garoufis, Christos and Tsiami, Antigoni and Kritsis, Kosmas and Kaliakatsos-Papakostas, Maximos A and Gkiokas, Aggelos and Katsouros, Vassilis and Maragos, Petros},
     booktitle = {Proceedings of the Audio Mostly 2018 on Sound in Immersion and Emotion},
     pages = {1--6},
     year = {2018},
   }

2017

1. Video-realistic expressive audio-visual speech synthesis for the Greek language

   Panagiotis P. Filntisis, Athanasios Katsamanis, Pirros Tsiakoulis,  and Petros Maragos

   Speech Communication 2017

   PDF Code

   @article{filntisis2017video,
     title = {Video-realistic expressive audio-visual speech synthesis for the Greek language},
     author = {Filntisis, Panagiotis P. and Katsamanis, Athanasios and Tsiakoulis, Pirros and Maragos, Petros},
     journal = {Speech Communication},
     volume = {95},
     pages = {137--152},
     year = {2017},
     publisher = {North-Holland},
   }

2. Photorealistic adaptation and interpolation of facial expressions using HMMS and AAMS for audio-visual speech synthesis

   Panagiotis P. Filntisis, Athanasios Katsamanis,  and Petros Maragos

   IEEE International Conference on Image Processing (ICIP) 2017

   PDF

   @inproceedings{filntisis2017photorealistic,
     title = {Photorealistic adaptation and interpolation of facial expressions using HMMS and AAMS for audio-visual speech synthesis},
     author = {Filntisis, Panagiotis P. and Katsamanis, Athanasios and Maragos, Petros},
     booktitle = {IEEE International Conference on Image Processing (ICIP)},
     pages = {2941--2945},
     year = {2017},
     organization = {IEEE},
   }

3. Demonstration of an HMM-based photorealistic expressive audio-visual speech synthesis system

   Panagiotis P. Filntisis, Athanasios Katsamanis,  and Petros Maragos

   IEEE International Conference on Image Processing (ICIP) 2017

   PDF

   @inproceedings{filntisis2017demonstration,
     title = {Demonstration of an HMM-based photorealistic expressive audio-visual speech synthesis system},
     author = {Filntisis, Panagiotis P. and Katsamanis, Athanasios and Maragos, Petros},
     booktitle = {IEEE International Conference on Image Processing (ICIP)},
     pages = {4588--4588},
     year = {2017},
     organization = {IEEE},
   }