Photoshop: FFT for Mac OS

[sjm]

I recently watched some videos at YouTube using an FFT filter to remove the texture effect on older printed photographs. I've not been able to find the FFT filter for Mac. Can someone steer me in the right direction?

[Tony W]

Have a look at ImageJ

https://imagej.nih.gov/ij/download.html

[sjm]

I looked, but unfortunately I don't know what I'm looking at. What do I do with the folder once it's downloaded?

[Tony W]

Not really a Mac user however instructions are on the site for various versions of OS X
https://imagej.nih.gov/ij/docs/install/osx.html

[klev]

Unzip, drag and drop, then click, as it suggests. It's supposed to give you something with a .app extension, which is a wrapper that OSX uses for folders that contain all (statically linked) files needed to launch and run that application.

[sjm]

Thanks for all the input, but I am still not able to make this work. I use Photoshop CS5 on a Mac running Sierra 10.12.5. Is there something similar to FFT that will work to remove the texture from scanned prints on a textured paper?

[klev]

Yeah I'm not sure. The fast fourier transform in itself has a variety of implementations, as it's actually a collection of algorithms. A package like this probably just wraps around an existing implementation of one or more of these to provide a friendly user interface and integration with photoshop.

If I wanted to do this, I would probably use python. It's not as convenient, because you would need to do some cloning or other work prior to application of an inverse transform to get rid of the paper texture. Integrating with photoshop is annoying, and the people who are likely to go through this kind of work are researchers, meaning that setup may not use a pretty installer.

The rest of them probably use scikit learn (well, actually scipy, not scikit learn, scikit learn doesn't contain the fast fourier transform; it contains more image processing tools) or matlab or something like that.