Ronald Greeley Center for Planetary Studies

Software – ImageJ


ImageJ is a public domain Java image processing program developed at the National Institutes of Health (NIH). 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 Download distributions are available for Windows, Mac OS, Mac OS X and Linux.

It 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, JPEG, BMP, DICOM, FITS and “raw”. It supports “stacks”, 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. It can create density histograms and line profile plots.

It supports standard image processing functions such as contrast manipulation, sharpening, smoothing, edge detection and median filtering. It does geometric transformations such as scaling, rotation and flips. Image can be zoomed up to 32:1 and down to 1:32.


ImageJ Applet

The applet version of ImageJ should open in a separate “ImageJ” window. With a slow connection, this may take a minute or two. Quit ImageJ by clicking on the “ImageJ” window’s close button.

Note that ImageJ requires a Java 1.1 compliant browsersuch as Firefox (PC or Linux),
IE 4.0 or later (PC or Mac) or Safari (Mac).

Sample Images
24 example images are available in ImageJ’s File/Open Samples submenu. Note that the Open…Import… and Save As… commands cannot be used when ImageJ is running as an applet unless you use Internet Explorer with this site set up as a “Trusted sites zone” or you use Sun’s HotJava browser with the unsigned applet security preference set to “Medium”.

Run the benchmarks in the Image/Benchmarks submenu to test the speed of your Java Virtual Machine.

ImageJ Home Page

ImageJ Download Page

Page last updated: Dec. 13, 2016


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