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Irene Viola

QoE and Multimedia Researcher

I am a senior (tenured) researcher at Centrum Wiskunde & Informatica. My interests lie in multimedia compression, transmission, and quality evaluation. My research is currently focused on Quality of Experience (QoE) metrics and methodologies for immersive multimedia systems (i.e., volumetric video for XR applications).

A recorded talk about my research, given for the 75th anniversary of CWI, is available here.

News

[15/09/2025] Our paper "Enhancing the Audience Experience for VR and AR Theatre with AI-generated Subtitles" was accepted in the ACM Symposium on Virtual Reality Software and Technology (VRST'25).

[15/09/2025] Our poster "VRD: A multi-lingual translation and AI-Assisted Navigation experience for VR Conference Application" was accepted in the ACM Symposium on Virtual Reality Software and Technology (VRST'25).

[18/08/2025] Our proposal "Launchpad Nine: Circular Alliance for a Sustainable Future of Immersive Experiences" was accepted in the first round of the CIIIC call "Artistic & Design Research for Immersive Experiences"! More info here

[05/08/2025] Our paper "Curating with Technology: How to Bring Old Fashion Back to Life in Museum Exhibitions" was accepted in the International Workshop on Interactive eXtended Reality (IXR'25).

[05/08/2025] Our paper "Social Density and its Impact on Behaviour in Virtual Environments" was accepted in the International Workshop on Interactive eXtended Reality (IXR'25).

[31/07/2025] Our paper "UVG-CWI-DQPC: Dual-Quality Point Cloud Dataset for Volumetric Video Applications." was accepted for publication in the dataset track of ACM International Conference on Multimedia (MM'25).

[31/07/2025] Our paper "RCQoEA-360VR: Real-time Continuous QoE scores for HMD-based 360° VR dataset" was accepted for publication in the dataset track of ACM International Conference on Multimedia (MM'25).

[17/04/2025] The 3rd edition of the Spring School on Social XR, ACM Europe School will take place from April 7th to 10th 2025 at CWI in Amsterdam!

[20/03/2025] Our paper "QoE Evaluation of Remote Physiotherapy in Volumetric Video and Video-Based Real-Time Communication" was accepted for publication in IEEE ICME 2025.

[11/03/2025] Our paper "Subjective and Objective Quality Assessment for Dynamic Point Cloud with Visual Attention in 6 DoF" was accepted for publication in ACM Transactions on Multimedia Computing, Communications and Applications [link].

[28/02/2025] The 3rd edition of the International Workshop on Interactive eXtended Reality (IXR'25) will take place in Dublin on October 27, in conjunction with ACM Multimedia 2025!

[22/01/2025] Our demo "Fashion Beneath the Skin - a Fashion Exhibition Experience in Social Virtual Reality" was accepted in IEEE VR 2025.

[17/01/2025] Our paper "Comparison of Visual Saliency for Dynamic Point Cloud: Task-free vs. Task-dependent" was accepted for publication in IEEE Transactions in Visualization and Computer Graphics, and will be presented in IEEE VR 2025.

[16/01/2025] Our paper "PointPCA+: A Full-Reference Point Cloud Quality Assessment Metric with PCA-based Features" was accepted for publication in Elsevier Signal Processing: Image Communication.

[10/01/2025] Our paper "User-centric Requirements for Enhancing XR Use Cases with Machine Learning Capabilities" was accepted in the 1st International Workshop on Virtual Reality for Human and Spatial Augmentation (VR-HSA), held in conjunction with IEEE VR 2025.

[17/12/2024] Our paper "VR2Gather: A Collaborative, Social Virtual Reality System for Adaptive, Multiparty Real-Time Communication" has been awarded the 2023 IEEE Multimedia Best Paper award! [link]

[02/12/2024] I was appointed as a member of the NWO-ENW Round Table Computer Science [link]

[25/10/2024] Our paper "A Clustering Approach to Unveil User Similarities in 6-DoF Extended Reality Applications" was accepted for publication in ACM Transactions on Multimedia Computing, Communications, and Applications. [link]

[01/09/2024] Our proposal "OPEN-DASH-PC: Open-Source ULL-DASH-PC For Multi-Party Real-Time Communication" was announced as one of the winners of the SPIRIT Open Call! Find out more here.

[09/08/2024] Our paper "Visual-Saliency Guided Multi-modal Learning for No Reference Point Cloud Quality Assessment" was accepted in the ACM MM'24 workshop QoEVMA.

[24/07/2024] Our paper "Open-Sourcing VR2Gather: A Collaborative Social VR System for Adaptive Multi-Party Real Time Communication" was accepted in the Open Source Competition at ACM MM'24.

[15/07/2024] Our paper "Deciphering Perceptual Quality in Colored Point Cloud: Prioritizing Geometry or Texture Distortion?" was accepted for oral presentation at the ACM International Conference on Multimedia (ACM MM'24).

[26/06/2024] Our social VR experience "Fashion Beneath the Skin" was exhibited at the Netherlands Institute for Sound and Vision. [link]

[21/05/2024] The first edition of our workshop "Measuring and Modeling User Experiences in XR" will be held in conjunction with QoMEX 2024 in Karlsham, Sweden, on June 17th.

[16/05/2024] Our paper "Autonomous Workflow for Multimodal Fine-Grained Training Assistants Towards Mixed Reality" was accepted in The 62nd Annual Meeting of the Association for Computational Linguistics (ACL 2024).

[07/05/2024] Our paper "PointPCA: point cloud objective quality assessment using PCA-based descriptors" was accepted for publication in the EURASIP Journal on Image and Video Processing.

[27/03/2024] Our paper "Communication Challenges between Clients and Producers of Immersive Media Applications: can Social XR help?" was accepted in International Conference on Interactive Media Experiences (IMX ’24).

[27/03/2024] Our paper "Enhancing Immersive Experiences through 3D Point Cloud Analysis: A Novel Framework for Applying 2D Visual Saliency Models to 3D Point Clouds" was accepted in QoMEX 2024.

[08/03/2024] Our paper "ComPEQ - MR: Compressed Point Cloud Dataset with Eye-tracking and Quality Assessment in Mixed Reality" was accepted at the ACM Multimedia Systems Conference (MMSys 2024).

[08/03/2024] Our paper "A Platform for Collecting User Behaviour Data during Social VR Experiments Using Mozilla Hubs" was accepted in the International Workshop on IMmersive Mixed and Virtual Environment Systems (MMVE 2024).

[07/03/2024] Our paper "Delay threshold for social interaction in volumetric eXtended Reality communication" was accepted for publication in ACM Transactions on Multimedia Computing, Communications, and Applications. [link]

[04/03/2024] The second edition of our Spring School on Social XR is happening now @CWI, with 30 students and 23 speakers!

[27/02/2024] I was invited to be a panel speaker for the event "Women+ @NWO".

[31/01/2024] Our paper "Designing and Evaluating a VR Lobby for a Socially Enriching Remote Opera Watching Experience" was accepted for publication in IEEE Transactions in Visualization and Computer Graphics, and will be presented in IEEE VR 2024.

[27/11/2023] I was invited to attend the Dagstuhl seminar on Social XR [link].

[18/08/2023] Our paper "QAVA-DPC: Eye-Tracking Based Quality Assessment and Visual Attention Dataset for Dynamic Point Cloud in 6 DoF" was accepted in ISMAR 2023.

[14/08/2023] Our paper "Subjective Quality Evaluation of Point Clouds using Remote Testing" was accepted in IXR 2023.

[05/05/2023] Our metric PointPCA+ got second place in the ICIP 2023 Grand Challenge on Point Cloud Visual Quality Assessment, and its companion paper "PointPCA+: Extending PointPCA objective quality assessment metric" will be presented at the conference. [link]

[21/04/2023] Our paper "Evaluation of point cloud features for no-reference visual quality assessment" was accepted in QoMEX 2023.

[31/03/2023] The second edition of our workshop "Interactive eXtended Reality (IXR'23)" will be held in conjunction with ACM Multimedia 2023 in Ottawa, Canada. [link]

[22/03/2023] Our paper "VR2Gather: A collaborative social VR system for adaptive multi-party real-time communication" was accepted in IEEE Multimedia Magazine. [link]

[17/03/2023] It's a wrap! Our Spring School of Social XR has officially come to an end. Thanks to all the speakers and participants for an intense week of learning!

[07/03/2023] I have given a guest lecture at the Blekinge Institute of Technology, (BTH) on designing and evaluating XR experiences.

[02/03/2023] Our paper “Extending 3-DoF metrics to model user behaviour similarity in 6-DoF immersive applications” was accepted in ACM MMSys 2023.

[22/01/2023] I was invited to attend the Dagstuhl seminar on Quality of Sustainable Experience [link]

Work Experience

April 2024 - Today
Senior (tenured) researcher at Centrum Wiskunde & Informatica (CWI)
Distributed and Interactive Systems (DIS)

October 2020 - April 2024
Tenure-track researcher at Centrum Wiskunde & Informatica (CWI)
Distributed and Interactive Systems (DIS)

August 2019 - September 2020
Postdoctoral researcher at Centrum Wiskunde & Informatica (CWI)
Distributed and Interactive Systems (DIS)

May 2019 - July 2019
Postdoctoral researcher at École Polytechnique Fédérale de Lausanne (EPFL)
Multimedia Signal Processing Group (MMSPG)

June 2018 - August 2018
Visiting researcher at Nagoya University
Hosted by Prof. Toshiaki Fujii

September 2015 - April 2019
Doctoral candidate at École Polytechnique Fédérale de Lausanne (EPFL)
Multimedia Signal Processing Group (MMSPG)

Education

September 2015 - April 2019
École Polytechnique Fédérale de Lausanne (EPFL)
PhD in Electrical and Electronic Engineering
Thesis: Compression and visual quality assessment for light field contents
Advisor: Prof. Touradj Ebrahimi

September 2013 - October 2015
Polytechnic University of Turin/EPFL
MSc in Computer Engineering
Thesis: A dataset for image super-resolution
Advisors: Prof. Martin Vetterli, Prof. Enrico Magli

September 2010 - July 2013
Polytechnic University of Turin
BSc in Cinema and Media Engineering

Publications

Projects

AMPLIFY (Horizon Europe)

November 2024 - present

AMPLIFY is a consortium of artists, technologists, and researchers from 8 European countries dedicated to facilitating the digital transition in the Cultural and Creative Industries (CCIs). AMPLIFY will develop, test, and pilot two innovative suites of digital technologies empowered by AI and XR for CCIs, based on a human-centric approach that balances the tools and their use, so that the whole project delivers not only innovative technologies, new ways of working, and enhanced audience experiences, but also sustainable economic models consistent with the beliefs, values, and practices of the creators and audiences for wider societal benefit.

OPEN-DASH-PC (SPIRIT Open Call)

September 2024 - present

OPEN-DASH-PC tackles the limitations of current real-time, multi-user immersive communication protocols, which face scalability issues and require complex central server algorithms. We propose Ultra Low Latency Dynamic Adaptive Streaming over HTTP for Point Cloud content (ULL-DASH-PC). This open-source transport protocol enables efficient, multi-quality, multi-user communication through point cloud data. By advancing the state of immersive communication, OPEN-DASH-PC will support both academic and industrial innovation.


INDUX-R (Horizon Europe)

January 2024 - present

INDUX-R envisions a human-centric XR ecosystem that will transform European industrial sectors by empowering humans and creating innovative XR products and services of significant added value. It targets concrete scientific breakthroughs integrated into technological enablers that will be applied in use cases driven by real-life needs while having the potential to be replicated in several other applications. These breakthroughs are focused on core XR technologies, namely, digitization and creation of XR assets, realistic animation, light-field HMDs, XR media streaming, and egocentric perception. To address the challenges that multi-user XR applications pose, INDUX-R will implement a highly scalable, zero-touch 5G architecture and a secure, interoperable IoT network that can accommodate fluctuating demands and minimize waste of resources.

TransMIXR (Horizon Europe)

October 2022 - present

The mission of TransMIXR is to introduce leading-edge technologies and experiences built around public values: to inform & entertain, to connect & inspire, to educate and empower. Its ambition is to strengthen the democratic mission and competitiveness of the European Cultural and Creative Sector with intelligent AI and XR technologies that are user-centric, transparent, trustworthy, inclusive, and accountable.

VOXReality (Horizon Europe)

October 2022 - present

VOXReality is an ambitious project whose goal will be to facilitate and exploit the convergence of two important technologies, natural language processing (NLP) and computer vision (CV). Vision systems drive both AR and VR, while language understanding adds a natural way for humans to interact with the backends of XR systems, or create multi-modal XR experiences combining vision and sound.

NWO WISE

September 2021 - present

The project focuses on on designing and integrating novel algorithms to improve compression and transmission efficiency of immersive media contents through Quality of Experience (QoE) optimization.


Past roles

European Network on Quality of Experience in Multimedia Systems and Services (Qualinet)
May 2017 - May 2024

Leader of Task Force 7: Immersive Media Experiences (IMEx)

VRTogether (EU Horizon 2020)
August 2019 - December 2020

My role in the project is to develop Quality of Experience (QoE) metrics and evaluation methods to qualitatively assess social VR experiences.

LIVE: Light field Image and Video coding and Evaluation (Swiss National Foundation for Scientific Research)
March 2016 - March 2019

My focus on this project was on immersive methodologies for subjective quality assessment of light field contents, particularly under coding artifacts, and on novel compression solutions for transmission and storage of light field images.