RetouchPRO

Go Back   RetouchPRO > Technique > Photo Restoration
Register Blogs FAQ Site Nav Search Today's Posts Mark Forums Read


Photo Restoration Repairing damaged photos

FFT problem. Some idea?

Reply
 
Thread Tools
  #11  
Old 01-04-2011, 09:19 AM
Florin's Avatar
Florin Florin is offline
Senior Member
 
Join Date: Dec 2009
Location: Trujillo - Venezuela
Posts: 251
Re: FFT problem. Some idea?

The problem is that picture was sent via internet, I have not the original
Reply With Quote top
  #12  
Old 01-04-2011, 09:29 AM
jcr6's Avatar
jcr6 jcr6 is offline
Member
 
Join Date: Oct 2002
Location: Asheville, NC
Posts: 72
Re: FFT problem. Some idea?

It's called FoveaPro 4 (ReindeerGraphics.com), but I'm no sure you want to pay $800 for a 177 plug-ins of which you'll only use a few.

I wasn't trying to push my software, but rather help you out. That Free FFT stuff you've been using has some limitations.

Something else that I wrote, called ClearID ($995 from OceanSystems.com) has a one-stop plugin for removing patterns (called Pattern Remover). It is intended for Law Enforcement -- again at a price that is not exactly cheap.
Reply With Quote top
  #13  
Old 01-04-2011, 09:31 AM
jcr6's Avatar
jcr6 jcr6 is offline
Member
 
Join Date: Oct 2002
Location: Asheville, NC
Posts: 72
Re: FFT problem. Some idea?

Another trick with Fourier processing -- if you need to rotate, increase the image size to 200%, THEN Rotate, THEN Remove the frequencies, THEN scale it back down.

Normally, rotation causes blur, but if you scale the image up by 200% first...
Reply With Quote top
  #14  
Old 01-04-2011, 09:44 AM
Florin's Avatar
Florin Florin is offline
Senior Member
 
Join Date: Dec 2009
Location: Trujillo - Venezuela
Posts: 251
Re: FFT problem. Some idea?

K, I understand.
I'm always working over very high resolutions, 800 - 1200 dpi, 6 inch wide, this is my standard work space. This is the way I can zoom in and paint even the most smallest details. I'll try to apply this in my work. I was thinking the same about the FFT, sometimes it blures too much the images.
You're really a great professional, congratulations and thank you again for your time.
F
Reply With Quote top
  #15  
Old 01-04-2011, 10:17 AM
Repairman's Avatar
Repairman Repairman is offline
Senior Member
 
Join Date: Dec 2010
Location: Bristol UK
Posts: 683
Re: FFT problem. Some idea?

Interesting stuff. I have never heard of fft - is it a filter hidden somewhere in the PS (CS3) menu. Any links to explanations and other uses for fft appreciated.
R.
Reply With Quote top
  #16  
Old 01-04-2011, 10:30 AM
jcr6's Avatar
jcr6 jcr6 is offline
Member
 
Join Date: Oct 2002
Location: Asheville, NC
Posts: 72
Re: FFT problem. Some idea?

FFT == Fast Fourier Transform.

It is NOT part of CSx.

This transform is a way of describing a signal (1-D, 2-D like an image, 3-D or more) as a summation of sine-waves. Short sine waves denote the "high" frequencies (meaning they repeat often) and long sine waves denote the "low" frequencies (meaning they slowly vary across the image).

In audio (a 1-D signal), the lows are the bass and the highs are the treble. In images (2-D), the highs are the edges of your image and the lows are the gradients and "halos" around things.

It is an interesting and useful mathematical space, especially for describing repeating patterns (like in this thread), but there is also a way to describe focus blur and motion blur and ways to remove it.

Here's a little bit: (link)

But there is a lot of stuff (including math!!) at Wikipedia.
Reply With Quote top
  #17  
Old 01-05-2011, 03:31 AM
Repairman's Avatar
Repairman Repairman is offline
Senior Member
 
Join Date: Dec 2010
Location: Bristol UK
Posts: 683
Re: FFT problem. Some idea?

Fascinating link JCR. Much of the detail goes right over my head but the photo examples get the basic point across and are inspiring. Back in the day I would occasionally be asked to produce a roadside poster from one frame of a TV advert. Removing video scan lines automatically would have saved me heaps of time. Live and learn!
R.
Reply With Quote top
  #18  
Old 01-05-2011, 12:34 PM
chillin's Avatar
chillin chillin is offline
Senior Member
 
Join Date: Sep 2006
Location: The Golden State
Posts: 1,324
Blog Entries: 1
Re: FFT problem. Some idea?

I used Image Analyzer. I filled out the gaps to continue with the pattern, cropped the picture & applied the filter. I can't post the full size of it (it is a 35MB tif), but here is the smaller sample.
Attached Images
File Type: jpg 5480_chillin_s.jpg (171.1 KB, 62 views)
File Type: jpg image analyzer.jpg (183.2 KB, 37 views)
Reply With Quote top
  #19  
Old 01-05-2011, 12:45 PM
Florin's Avatar
Florin Florin is offline
Senior Member
 
Join Date: Dec 2009
Location: Trujillo - Venezuela
Posts: 251
Re: FFT problem. Some idea?

Thank you Chillin, this is really much better than my poor FFT resoult.
However, due to the client's hurry, I started this yesterday with my traditional (painting) retouch. Here is a capture. It will take more time but it will look fine, I'm sure.
Thank you a lot again for your time
Attached Images
File Type: jpg FFTproblem.jpg (47.2 KB, 54 views)
Reply With Quote top
  #20  
Old 01-05-2011, 12:55 PM
chillin's Avatar
chillin chillin is offline
Senior Member
 
Join Date: Sep 2006
Location: The Golden State
Posts: 1,324
Blog Entries: 1
Re: FFT problem. Some idea?

If you wish, I can give you a link to the full version?
Reply With Quote top
Reply

  RetouchPRO > Technique > Photo Restoration


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
luminance problem toni84 Photoshop Help 9 12-18-2010 05:08 PM
photoshop or file problem kyleb Photoshop Help 0 12-15-2010 10:25 PM
Removing banding texture. FFT Filter for MAC? SBNL Photo Retouching 12 12-15-2010 05:17 PM
Impressionist plugin Windows 7 problem belhbo Software 1 12-02-2010 02:30 AM
Problem with FFT - Strange Behavior rnbluvva Photo Restoration 7 09-16-2006 11:46 PM


All times are GMT -6. The time now is 05:09 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
SEO by vBSEO ©2011, Crawlability, Inc.
Copyright © 2016 Doug Nelson. All Rights Reserved