ChaLearn UDIVA-HHOI Challenge @ ECCV 2026 - Registration now open!
Cristina Palmero Cantariño
[Apologies for cross-posting]
Dear colleagues,
We are pleased to announce the ChaLearn UDIVA-HHOI Challenge @ ECCV 2026, organized within the CONTEXTUS Workshop at the European Conference on Computer Vision (ECCV 2026).
The challenge focuses on advancing research in context-aware human behavior understanding, emphasizing how people interact, coordinate, and influence one another in real-world settings. Going beyond isolated action recognition, the challenge promotes socially grounded and multimodal visual intelligence.
Participants will work with the new UDIVA-HHOI dataset, a multimodal, multi-view dataset of non-scripted dyadic interactions in a collaborative assembly task. The dataset includes synchronized audio, video, transcripts, and rich contextual metadata from one exocentric and two egocentric views, capturing behaviors such as collaboration, joint attention, and leader-follower dynamics. Annotated sessions include both verbal and non-verbal human-human-object interaction events, together with goals, intentions, and causal relationships.
The challenge features 5 tracks:
Track 1: Multimodal Exocentric Event Recognition
Track 2: Multimodal Egocentric Event Recognition
Track 3: Multimodal Exocentric Event Anticipation
Track 4: Multimodal Egocentric Event Anticipation
Track 5: Multimodal Exocentric Causal Event Grounding
Registration is now open! For schedule and more information please visit:
Challenge website: https://lap.chalearn.eu/public/udiva-hhoi-challenge-eccv26
Workshop website: https://lap.chalearn.eu/public/ECCV26-CONTEXTUS (Call for papers and invited speakers coming soon.)
Top-ranked teams will receive monetary awards and certificates, along with the opportunity to publish and present their work at the workshop. Travel and registration grants may also be available subject to funding.
Supported by ChaLearn, SurfingTech, and Google.
Organizers:
Cristina Palmero (King’s College London)
Sergio Escalera (Universitat de Barcelona & Computer Vision Center)
Albert Clapés (Universitat de Barcelona)
Xavier Baró (Universitat de Barcelona)
Daniele Berardini (Instituto Italiano di Tecnologia)
Hugo Jair Escalante (The University of Texas at El Paso & INAOE)
Vittorio Murino (Instituto Italiano di Tecnologia & University of Verona)
Challenge chairs: Jeanfed Ramírez Lima, Luis J. Arellano
Advisory board: Isabelle Guyon, Jeffrey Cohn