Dear All,

For the past four years, the ImageJ team at LOCI (, University of Wisconsin-Madison, has been working tirelessly to expand the paradigm of ImageJ beyond its original limitations. Our primary focus has been on supporting fully n-dimensional scientific images of arbitrary sizes and data types, while we also endeavored to make ImageJ more interoperable with other software applications, easier to extend, and more modular.

Today, the ImageJ team is pleased to announce a public release candidate: ImageJ 2.0.0-rc-2. We tested the first release candidate internally, but now is the time to engage the community: please test the second release candidate with your favorite workflows.

ImageJ 2.0.0 uses the same user interface as ImageJ 1.x. Actually you can think of it as providing a layer of functionality on top of ImageJ 1.x, as Fiji has done for the past several years. New versions of

ImageJ1 developed by Wayne Rasband will continue to slot in seamlessly with ImageJ2. This allows you to keep using ImageJ in familiar ways, while also enabling migration toward more powerful new features as needed.

Please feel free to test the release candidate either by downloading the .zip file ( or by installing or updating Fiji ( You can expect frequent updates in the near future as issues are addressed.

Please find more detailed information in our blog post:


The ImageJ2 development team

Kevin W. Eliceiri

Director, Laboratory for Optical and Computational Instrumentation (LOCI) Departments Cell and Molecular Biology and Biomedical Engineering Affiliate Principal Investigator, Morgridge Institute for Research (MIR) Room 271 Animal Sciences, 1675 Observatory Drive, Madison, WI 53706

Phone: 608-263-6288