ImageJ is open source software for processing and analyzing scientific images.
|  | ImageJ is the original desktop application which has been in development since 1997. | 
|  | ImageJ2 is a new version of ImageJ targeting scientific multidimensional image data. | 
- This organization is an architectural layer housing ImageJ, ImageJ2, and their core extensions.
- ImageJ's repository is imagej/ImageJ. ImageJ2's primary repository is imagej/imagej2.
- ImageJ2 is built on scijava and imglib. The fiji project is built on ImageJ and ImageJ2.
- See also the ImageJ page and ImageJ2 page of the ImageJ wiki.