Theophanis Tsandilas

theophanis.tsandilas at (or at


Office 213

Bât 650 Ada Lovelace

Université Paris-Saclay

91405 Orsay Cedex France


I am research scientist (“Chargé de Recherche”) at Inria, member of the Ex)Situ team, and faculty member at the Université Paris-Saclay at the Interdisciplinary Laboratory of Digital Sciences (LISN - CNRS).

My research lies in the area of Human-Computer Interaction. I am especially interested in the following topics: sketching user interfaces, creativity-support and computer-assisted design tools, visualization design, gesture-based and pen-based interaction. I have also developed strong interest in statistical inference and modeling methods with applications in qualitative data analysis and visualization problems.

After a degree in Electrical and Computer Engineering at the National Technical University of Athens (Greece), I moved to Canada. I completed a M.Sc. and then a Ph.D. degree (2007) at the Department of Computer Science at the University of Toronto. I continued my research carreer in France, first as a postdoctoral follow and then as a faculty member.

I received my Habilitation (HDR) in July 2020.

selected publications

  1. chi
    honorable mention
    Gesture Elicitation as a Computational Optimization Problem
    Tsandilas, Theophanis, and Dragicevic, Pierre
    In ACM Conference on Human Factors in Computing Systems (CHI), Apr 2022
  2. vis/tvcg
    StructGraphics: Flexible Visualization Design through Data-Agnostic and Reusable Graphical Structures
    Tsandilas, Theophanis
    IEEE Transactions on Visualization and Computer Graphics (VIS’20), Feb 2021
  3. sigmod
    Data Series Progressive Similarity Search with Probabilistic Quality Guarantees
    Gogolou, Anna,  Tsandilas, Theophanis, Echihabi, Karima, Bezerianos, Anastasia, and Palpanas, Themis
    In ACM International Conference on Management of Data (SIGMOD), Jun 2020
  4. tochi
    Fallacies of Agreement: A Critical Review of Consensus Assessment Methods for Gesture Elicitation
    Tsandilas, Theophanis
    ACM Transactions on Computer-Human Interaction (TOCHI), Jun 2018
  5. uist
    Shape-Aware Material: Interactive Fabrication with ShapeMe
    Wessely, Michael,  Tsandilas, Theophanis, and Mackay, Wendy
    In ACM Symposium on User Interface Software and Technology (UIST), Oct 2018
  6. chi
    How Novices Sketch and Prototype Hand-Fabricated Objects
    Bousseau, Adrien,  Tsandilas, Theophanis, Oehlberg, Lora, and Mackay, Wendy E.
    In ACM Conference on Human Factors in Computing Systems (CHI), May 2016
  7. chi
    honorable mention
    SketchSliders: Sketching Widgets for Visual Exploration on Wall Displays
    Tsandilas, Theophanis, Bezerianos, Anastasia, and Jacob, Thibaut
    In ACM Conference on Human Factors in Computing Systems (CHI), Apr 2015
  8. chi
    Prospective Motor Control on Tabletops: Planning Grasp for Multitouch Interaction
    Olafsdottir, Halla,  Tsandilas, Theophanis, and Appert, Caroline
    In ACM Conference on Human Factors in Computing Systems (CHI), Apr 2014
  9. uist
    The Drawing Assistant: Automated Drawing Guidance and Feedback from Photographs
    Iarussi, Emmanuel, Bousseau, Adrien, and Tsandilas, Theophanis
    In ACM Symposium on User Interface Software and Technology (UIST), Oct 2013
  10. chi
    best paper
    Musink: Composing Music through Augmented Drawing
    Tsandilas, Theophanis, Letondal, Catherine, and Mackay, Wendy
    In ACM Conference on Human factors in Computing Systems (CHI), Apr 2009