how to use the fft filter?

[mschonher]

Can someone out there please tell me how to use the FFT filter on this photograph? I am clueless!  Does it make a difference where I downloaded this filter from? I'm pretty sure I got the link from Hannie..also in PS I have the choice of FFT or IFFT...which one do you use?

Thanks for any help..................Mary

[klassylady25]

Use the FFT RGB and the IFFT RGB for the process.  Here is the link again in case you need it and I'm sending you the FFT brush via email.  I had a go on this little guy and the FFT worked great.  PS I know it's red.  I didn't take time this morning to work that much on it.  This was a quicky with the FFT.

http://retouchpro.com/tutorials/?m=show&id=185

[mschonher]

Hi Candy, thanks so much for the link...I'm going to check it our right now. I hope I can do it..........Mary :P

[klassylady25]

If you get hung up let me know.  There were a few things that didn't make sense to me and then it clicked. At least it's still rattling around in this old brain of mine. 

Did you get the brush?

[mschonher]

Hi Candy, I couldn't use the fft filter on this little guy. I know I must have done something wrong but I did try to follow the tut. I couldn't see any stars after I applied the filter and went to the red channel....it was just a fuzzy mess. Was I suppose to brush the fuzz out? I tried a second, third and fourth time and I kept getting a message that said "FFT only works on true color images" I got tired of trying so I did this: Duped the background, added noise>dust and scratches, then added a gausian blurr then texture>enlarged grain no contrast 10%.  This is what I got. I will try the FFT again. Thanks for your help............Mary  PS I think he looks pale.

[mschonher]

Thanks Candy, I got the brush, now I need to figure it all out. I just don't get some of it..............mary

[schen]

Mary,

FFT filter only works with repetitive patterns that you want to remove.  Maybe it was the resolution or my old eyes, I could not see any repetitive patterns on the image.

[mschonher]

Hi Schen,

You can't see it here but it has a lot of honeycomb texture from the paper it was printed on. Isn't that a repetitive pattern? I'm going to figure it out soon.............I hope............Mary

[Ratz]

Mary, I am a real dummy with FFT also! no matter what I do I can't figure it out, >:(
Your restore looks great the way you did it, I would warm him up a bit though.
Regards Vicki

[truckersau]

Here is the link again in case you need it and I'm sending you the FFT brush via email.

Hi Candy. I have the FFT filter, and have used it a couple of times now.
I just noticed in this message you mention the "FFT Brush" is this something I missed or is this something I need to get?

[klassylady25]

You're not dummies, you just don't have the knowledge yet....  get ready to up your learning curve :o)

1. bring your picture in to photoshop
2. go to image on the toolbar; Image > duplicate
   (you should have two images visible to you now)
3. filter > run FFT RGB
4. change channel to:  red
   (at this point you should see the stars)
5. paint stars - but NOT the center
6. turn back on ALL channels again
7. now run - IFFT RGB
  ( it will look black and white but don't worry)
8. before you move the adjusted photo onto the original you will want to change that layer to luminosity.
9. take your move tool and slide the luminosity layer onto your original.
10. go back to your original (which is under the luminosity layer) and run median at 2 or 3.
11. lastly hold down your shift/control/alt E - and you will have the new corrected layer.
12. you can color correct at the beginning or at the end (that's a preference)  I've done it both ways.  It really depends on how much information you want to see at the start.  

I have pictures to go with the steps.  So if you'd like to Email me (so I don't take up space here) I'll be glad to send them to you.   [email protected]

[klassylady25]

Someone took the time to make a brush that fits the shape of the stars.  I'll be glad to send it to you, Ray.

[truckersau]

 :up: Thanks Candy.
Just in case you don't have it, my email address.
[email protected]

[schen]

Now I see it after I blew it up on my monitor.  I believe it is the texture of the photopaper.  It does not cover evenly over the whole image so the FFT filter will have some limited effect.

Because the honeycomb is not that conspicuous, I will leave them after using FFT filter.

I did one restoration that was printed on canvas with fake oil painting brush marks.  I was debating whether I should clean them up or not.  I ended up left the brush marks.

[Pelican]

Two things.

1. The FFT filter appears to no longer be available at the addy given in the tut. I have a copy of it here if you need it.

http://litterboxx.com/FFT_RGB_PlugIns_13April_2005.zip

2. Even though I don't have any trouble getting this to work, I have no clue as to what step 9 in Candice's mini tut or similar in the other one is for. It makes no sense to me. The luminosity layer is already on top of the original.....

I have other people on another site trying this and its a major stopping point for them. I just work it from where I am... am I wrong?

In a nutshell, heres what I do. Mostly what Candy said.

Dupe the original and run the FFT
Go to red channel and do the stars
Click back on RGB and open layers palette
Run IFFT
Change mode to luminosity and select background layer
Apply noise, median
merge visible

C