6th Cell Tracking Challenge Edition at ISBI 2021

The sixth challenge edition is being organized as part of ISBI 2021 to be held virtually in April 2021. In this edition, the primary focus is put on methods that exhibit better generalizability and work across most, if not all, of the 13 already existing datasets, instead of developing methods optimized for one or a few datasets only. Apart from this primary track that prioritizes highly competitive methods only, there is also a second track running that allows anyone to compete over the datasets of their choice without the hunt for generalizability across multiple datasets. The submissions for both tracks will be collected, evaluated, and announced at the corresponding ISBI 2021 challenge workshop according to the following schedule:

October 30th, 2020The qualification, evaluation, and ranking criteria for the sixth challenge edition are released.
November 1st, 2020The pre-registration period for the sixth challenge edition is opened
November 30th, 2020
January 15th, 2021
New silver reference segmentation annotations for 13 existing training datasets are released
December 31st, 2020
The pre-registration period for the sixth challenge edition is closed
January 15th, 2021Pre-registered competitors, who passed the primary track qualification criteria, are announced
February 25th, 2021The registration period for the secondary track of the sixth challenge edition is closed
March 1st, 2021Deadline for submitting results to both the primary and secondary tracks, including algorithm implementations, detailed descriptions of the approaches, and parameters used
April 13th, 2021ISBI 2021 Challenge Workshop
May-June 2021Validation of the results submitted by re-running the respective algorithms on our evaluation servers


To pre-register for the ISBI 2021 challenge edition please send an email to the main challenge coordinator at:


To simplify the pre-registration process, please include your full name and affiliation in your email. Please be aware that pre-registrations are handled on a weekly basis. Therefore, you may have to wait a few days before your pre-registration is confirmed.

Please note that by pre-registering for the challenge, you explicitly agree with the use of your personal data provided for the ISBI 2021 challenge related activities, but you are not obliged in any way to participate. Your pre-registration is considered as an expression of interest to participate in the ISBI 2021 challenge edition. If no results are submitted for evaluation nor the qualification criteria are met, your pre-registration will be canceled and your personal data provided will be discarded right after the submission deadline on March 1st, 2021.


Primary Track (subject to qualification)


Secondary Track (no qualification required)