Re: NIH Image (was artifacts...)

[Ben Haskell <npthaskell@netbridge.net>]

Sergei wrote:
> 
> >Even better (but slower!!) "hybrid median" filter plug-in has been
> >developed for Mac versions of Photoshop and NIH Image:
> >       file "RankFilters.hqx" at
> >       ftp://codon.nih.gov/pub/nih-image/plug-ins/
> 
> what is NIH image?

NIH Image is a image processing program developed mostly for
scientific & engineering.
It concentrates on things like image denoising, image enhancement,
and object measurements..

By "measurements", it can be set up to do things like:

1. Counting objects (take a photo of an ocean floor, count number of
scallops versus clams versus starfish)

2. Length measurements (how big are those scallops ?).

3. Thresholding and edge detection (find and outline a cancerous
growth in an X-ray image); it is capable of generating "false color"
images from gray scales (like false color satellite imagery). Dan
Culbertson has been experimenting with false colors for black quad
tone images. [Dan, sorry, couldn't find more false color LUTs).

4. 3-dimensional reconstructions of "MRI-scan slices" of the human brain.

NIH Image is complementary to Photoshop in the things it does best;
the "artistic" effects that NIH Image are capable of are more
primitive than those of Photoshop.

NIH Image is free! More info at:
	http://rsb.info.nih.gov/nih-image/

NIH Image is mostly Mac centered, though Windows ports exist

A similar free program for Windows is Image Tool:
     http://ddsdx.uthscsa.edu/dig/itdesc.html
Plug-ins for Windows Photoshop also work for Image Tool.

-- Ben Haskell

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