SHREC2021 - 3D Shape Retrieval Challenge 2021

At Workshop on 3D Object Retrieval

New since 2020: Full paper submissions will follow a two-stage review process and will be published in the international journal Computes & Graphics upon acceptance.

We strongly encourage to consider the graphics replicability stamp initiative,, and to apply for this additional sign of recognition.


The general objective of the 3D Shape Retrieval Contest is to evaluate the effectiveness of 3D-shape retrieval algorithms. SHREC2021 is the sixteenth edition of the contest. Like previous years, it is organized in conjunction with the Eurographics 2021 Workshop on 3D Object Retrieval. At least one author per track must register for the workshop, and present the results. We also cordially invite all participants of a track to register and attend the workshop.

Thanks to the efforts of previous track organizers, SHREC already provides many resources to compare and evaluate 3D retrieval methods. For this year's contest, we aim to explore new and updated tracks. Therefore, the participants are invited to have an active role in the organization of the event. This includes proposing track themes, building or acquiring a test collection, and deciding upon the queries, relevance assessment, and performance measures.

The participants of each track will collectively write a paper, which will be published in the proceedings of the Eurographics Workshop 3D Object Retrieval. At least one author per track must register for the workshop, and present the results.  We also cordially invite all participants of a track to register and attend the workshop.


The following tracks are organized. For description of tasks, the collections, queries, the evaluation procedure, and time schedule, follow the links or contact the track organizer.

  1. Retrieval of cultural heritage objects
    Organizers: Ivan Sipiran, Patrick Lazo, Cristian Lopez
    Contact: Ivan Sipiran
    Web page
  2. Fitting simple geometric primitives on point clouds from CAD objects
    Organizers: Chiara Romanengo, Andrea Raffo
    Contact: Chiara Romanengo
    Web page
  3. Retrieval and classification of protein surfaces equipped with physical and chemical properties
    Organizers: Andrea Raffo, U. Fugacci, Silvia Biasotti, Walter Rocchia
    Contact: Andrea Raffo
    Web page
  4. Surface-based protein domains retrieval
    Organizers: Florent Langenfeld, Matthieu Montes
    Contact: Florent Langenfeld
    Web page
  5. Classification in Cryo-Electron Tomograms
    Organizers: Ilja Gubins, Marten Chaillet, Gijs van der Schot, Remco C. Veltkamp, Friedrich G. Förster
    Contact: Ilja Gubins
    Web page
  6. Skeleton-based Hand Gesture Recognition in the Wild
    Organizers: Fabio Marco Caputo, Andrea Giachetti
    Contact: Fabio Marco Caputo
    Web page
  7. 3D Point Cloud Change Detection for Street Scenes
    Organizers: Tao Ku, Sam Galanakis, Bas Boom, Remco C. Veltkamp
    Contact: Tao Ku
    Web page
  8. Quantifying Shape Complexity
    Organizers: M. Ferhat Arslan, Alexandros Haridis, Paul L. Rosin, Sibel Tari
    Contact: M. Ferhat Arslan
    Web page


The following list is a step-by-step description of the activities:

  1. Track organizers have sent their proposal describing the envisioned task, collection, queries, ground truth, evaluation method, and expected number of participants.
  2. The tracks are selected, and are listed at the SHREC web page. The track organizers start up their track.
  3. Participants register for the tracks they want to participate in.
  4. Each track is performed according to its own time schedule.
  5. The track organizers collect the results.
  6. The track results are combined into a joint paper, to be submitted for review to Computers & Graphics.
  7. The description of the tracks and their results are presented at the Workshop on 3D Object Retrieval 2021

SHREC Time Schedule

Important dates
• December 29, 2020: Submission deadline for track proposals.
• December 30, 2020: Notification of acceptance of track proposals.
• December 30, 2020 to March 15, 2021: Each track has its own time line.
• April 1, 2021: Submission deadline for full paper for C&G review.
• April 27, 2021: First reviews done, first stage decision on acceptance or rejection.
• May 20, 2021: First revision due.
• June 15, 2021: Second stage of reviews complete, decision on acceptance or rejection.
• June 30, 2021: Final version submission.
• July 5, 2021: Final decision on acceptance or rejection.
• July 10, 2021: Submission deadline for short paper EG Digital Library review.
• July 25, 2021: Reviews done, decision on acceptance or rejection.
• August 18, 2021: Final version short paper submission.
• September, 2021: Publication online in Computers & Graphics journal or Eurographics Digital Library.

For information about the contest, the results, etc. of previous years, see past events:
SHREC 2020 SHREC 2019, SHREC 2018, SHREC 2017, SHREC 2016,  SHREC 2015, SHREC 2014, SHREC 2013