![]() ![]() ![]() The current version of ImageJ is often referred to as ImageJ2, to differentiate it from ImageJ 1.x. As a result it is currently suppported by many hundreds of plugins created by a diverse community of developers. ImageJ grew organically over time as more features were added, according to user requests. It has always been, and continues to be, a one-developer project of Wayne Rasband originally developed in 1997 as a cross-platform version of NIH Image. ImageJ 1.x, often shortened to ImageJ1 or IJ1, is a stable version of ImageJ which has been under continuous development since 1997. The author, Wayne Rasband, is at the Research Services Branch, National Institute of Mental Health, Bethesda, Maryland, USA. It is being developed on Mac OS X using its built in editor and Java compiler, plus the BBEdit editor and the Ant build tool. User-written plugins make it possible to solve almost any image processing or analysis problem. Custom acquisition, analysis and processing plugins can be developed using ImageJ’s built in editor and Java compiler. ![]() ImageJ was designed with an open architecture that provides extensibility via Java plugins. Density or gray scale calibration is also available. Spatial calibration is available to provide real world dimensional measurements in units such as millimeters. The program supports any number of windows (images) simultaneously, limited only by available memory. All analysis and processing functions are available at any magnification factor. Image can be zoomed up to 32:1 and down to 1:32. It does geometric transformations such as scaling, rotation and flips. It supports standard image processing functions such as contrast manipulation, sharpening, smoothing, edge detection and median filtering. It can create density histograms and line profile plots. It can calculate area and pixel value statistics of user-defined selections. It is multithreaded, so time-consuming operations such as image file reading can be performed in parallel with other operations. It supports “stacks”, a series of images that share a single window. It can read many image formats including TIFF, GIF, JPEG, BMP, DICOM, FITS and “raw”. It can display, edit, analyze, process, save and print 8-bit, 16-bit and 32-bit images. Downloadable distributions are available for Windows, Mac OS, Mac OS X and Linux. It runs, either as an online applet or as a downloadable application, on any computer with a Java 1.4 or later virtual machine. ImageJ is a public domain Java image processing program inspired by NIH Image for the Macintosh. ![]()
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