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Note that NIH Image is legacy software that only runs on PPC Macs. It has not been updated for almost 10 years. Windows, Linux and Mac users can use ImageJ, which is similar to NIH Image, and is frequently updated.

nih-image163_ppc.hqx (693K) is a version of the NIH Image that is compatible with Mac OS 9.2.2 and with the Classic environment of OS X 10.2.
The contrib directory on rsbweb contains programs, images and macros contributed by users of NIH Image.
The demos directory contains demonstration versions of commercial Macintosh image processing and analysis programs.
The documents directory contains NIH Image related documents.
The images directory contains example grayscale and 8-bit color images in TIFF and PICT format.
The nih-image_spin-offs directory contains programs derived from NIH Image.
The macros directory contains the macros that are distributed with NIH Image.
The plug-ins directory contains Photoshop compatible plug-ins known to work with NIH Image.
The programs directory contains miscellaneous programs and utilities that are potentially useful in conjunction with NIH Image.
The stacks directory contains example NIH Image "stacks" (animation sequences and 3D images).
The source directory contains the NIH Image 1.63 Pascal source in plain text format.
The user-macros directory contains user contributed NIH Image macros. The readme file describes some of the macros.

[NIH Image Home Page]