ImageJ is public domain open source software. An ImageJ user has the four essential freedoms
Mac OS X
1. Windows Installation
The Windows version of ImageJ is available bundled with either Java 6 or Java 8, and without Java. All versions include ImageJ.exe.
Note: When launching ImageJ for the first time, you may get a message saying that the Java Virtual Machine (JVM) cannot be found, in which case you will need to find the javaw.exe command in the file system, at a location something like "C:\Program Files\Java\jdk8\bin\javaw.exe".
Use the Help>Update Image command to upgrade to newer versions of ImageJ
Here are some common problems encountered when running ImageJ on Windows, and their solutions:
Delete the ImageJ.cfg file in the ImageJ folder.
Upgrade to Windows 8.1 or later, open theImageJ.exe >Properties> Compatibility panel and uncheck "Disable display scaling on high DPI settings"
Enable "Run single instance listener" in Edit>Options>Misc
Enable "Use JFileChooser to open/save" in Edit>Options>Input/Output.
2. Linux Installation
To install and run ImageJ, download ImageJ bundled with either 32-bit or 64-bit Java, extract the ImageJ directory from the ZIP archive, change to the ImageJ directory and double click the "ImageJ" launcher
Here are some common problems encountered when running ImageJ on Linux, and their solutions:
Disable all effects in System Preferences > Appearance > Visual Effects.
3. Mac OS X Installation
Download ImageJ for Mac OS X from the Download page. The ZIP file you download (Image1.xx.zip) should automatically expand to a folder named "ImageJ". Copy this folder to the Applications folder, open it, and copy ImageJ.app to the dock
User guide will be available at (https://imagej.nih.gov/ij/docs/guide/user-guide.pdf)
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