Tools and Data



ImageJ is a public domain Java image processing program. It runs, either as an online applet or as a downloadable application, on any computer with a Java 1.1 or later virtual machine. ImageJ can display, edit, analyze, process, save and print 8-bit, 16-bit and 32-bit images. It can read many image formats including TIFF, GIF and JPEG. It can "stack" a series of images that share a single window. It can calculate area and pixel value statistics of user-defined selections. It can measure distances and angles. Images can be zoomed up to 32:1 and down to 1:32. All analysis and processing functions are available at any magnification factor. Spatial calibration can be set to provide real world dimensional measurements.

Tool Builder

National Institutes of Health (NIH)

Tool Cost

Free: This software is in the public domain.

Tool Help

Basic Concepts of Using ImageJ


Contact the User Services Office of the Alaska Satellite Facility (ASF) for information on how to access SAR data for educational purposes.

Data provider

The data used in this case study was originally provided by the ASF. The images are courtesy of the Japanese Aerospace Exploration Agency (JAXA).