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PhD Researcher · Computer Vision & Privacy

Allassan Tchangmena A Nken

I build efficient, privacy-preserving methods for video understanding, using differential privacy, federated learning and low-rank structure to recognise human activity without exposing who is in the frame.

Open to Research Scientist roles from July 2027

About

I'm a PhD candidate in Computer Science at the University of Galway, part of the Research Ireland Centre for Research Training in Digitally Enhanced Reality (CRT D-REAL), supervised by Dr. Ihsan Ullah, Dr. Susan McKeever and Prof. Peter Corcoran.

My research studies the three-way trade-off between efficiency, privacy and accuracy in video Human Activity Recognition: how far each can be pushed, and how gains in one cost the others. My work combines differential privacy, federated learning, random projections and singular value decomposition, and has appeared at IJCAI, ECML PKDD and ICIP.

Before joining the University of Galway, I obtained a Master degree in Robotic Engineering, a Master degree in Mathematical Sciences (Option Data science) at AIMS Cameroon and a Master in Machine In machine Intelligence at the African Masters in Machine Intelligence (AMMI), and interned at IBM Research Africa, where I worked on retrieval with multiple query vectors, for LLM embeddings. Outside the lab I'm building MarketPulse, a price intelligence platform for African informal markets.

  • Privacy-preserving ML
  • Video understanding
  • Federated learning
  • Differential privacy
  • Efficient deep learning
  • Information retrieval

News

    PublicationsConference papers and workshops

    Experience

      ProjectsProducts and open-source code

      Education

        Service & Awards

          Contact

          I'm happy to talk about research collaborations, internships and full-time research roles. Email is the best way to reach me.