Soft brushes and Inverse FFT with Photoshop files.

Posted by NParker on Aug 21, 2008; 6:30pm
URL: http://imagej.273.s1.nabble.com/Soft-brushes-and-Inverse-FFT-with-Photoshop-files-tp3695324.html

Hi there! I'm found out about ImageJ from the RetouchPRO message board. It's the only graphic
application that can handle FFT on the Mac.

So my question is a two-parter:

As I'm sure you know, FFT is a great way to remove repeating patterns from an image (like textured
paper, moire patterns, etc). The method requires using FFT and then using a black brush to paint out
the white "stars" then running Inverse FFT to restore the image.

The painting and airbrush tools in ImageJ are, to be nice, very MacPaint circa 1988. Are there any
anti-aliased, softer or blurry brushes available for it?

It it possible to take my FFT image into Photoshop and do my image painting there?  When I  open my
Photoshop-painted FFT image into ImageJ and try to run Inverse FFT, I get an error that a "Frequency
Domain image is required".

I'd appreciate any help with this extremely powerful tool.