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IsletJ (ImageJ)
Author Jan Švihlík and Jan Schier
Maintainer Jan Schier
Development status Active

IsletJ is a plugin for analysis of microscopy images of Langerhans islets in ImageJ. It provides free, open source tool for analysis of islets diameter and number and for estimation of sample purity (ratio of endocrine/exocrine tissue area).


IsletJ was designed to work with plain ImageJ 1.x. It requires Java-8.

The simplest way to install the plugin is using the Fiji installer>

  • Download current version of Fiji from here
  • Launch Fiji and run Updater Help  › Update...
  • In ImageJ Updater select Manage update sites
  • In Manage update sites select IsletJ and then Close
  • In ImageJ Updater select Apply changes
  • Restart Fiji


User documentation in PDF format is available at github


  • Habart D., Švihlík J., Schier Jan, Cahová M., Girman P., Zacharovová K., Berková Z., Kříž J., Fabryová E., Kosinová L., Papáčková Z., Kybic J., Saudek F. : Automated Analysis of Microscopic Images of Isolated Pancreatic Islets , Cell Transplantation vol.25, 12 (2016), p. 2145-2156, DOI