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Using the FFT filter to remove photgraphic paper texture

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  #101  
Old 05-27-2008, 09:50 PM
secretagents secretagents is offline
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Re: Gimp FFT filter results

Hi guys, did this in the Gimp as follows :

Applied FFT filter on the image (no layers), used the blur brush on the white dots and then applied the Inverse FFT filter. Not bad and rather straightforward isnt'it ?
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File Type: jpg fftgimp.JPG (75.6 KB, 154 views)
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  #102  
Old 06-17-2008, 06:36 PM
Joe Townsend Joe Townsend is offline
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Re: Using the FFT filter to remove photgraphic pap

Please tell us which FFT flter you use. Kamlex or another?

I'm editing my original post to add more info and questions.

I have found that none of the links for the Alex Chirokov plug-in work. I have instilled the Kamlex FFT plug in and their RGB>HSL plug in. I have tried to view the Kamlex video using Win Med Player 9*. Video does not run well, no audio, poor color and contrast. Stepped through video frame by frame to come up with this step by step procedure:
1. Duplicate image in Photoshop: Image> Duplicte
2. Filter> Fourier Transform>FFT
3. Select green Channel only
4. Paint over 4 points around center star with black, size 10 (I used 20), normal, 100% flow
5. Select RGB, all channels
6. Filter> Fourier Transform> IFFT
7. Filter>Color space>RGB to HSL
8. Select Blue Channel only
9. Select All
10. Edit copy
11. Select original image
12. Filter>Color space>RGB to HSL
13. Select Blue Channel
14. Edit>Paste
15. Select RGB Channels
16. Filter>Color space>HSL to RGB
17. Deselect

Result is an improvement but not complete success. Applied Neat Image with little improvement. Images attached are parts of the 8x10 photo of historic aircraft. First shows heavy pattern from paper texture; 2nd shows improvement, with pattern gone around edges, but still in center. Would like to avoid using Gaussian Blur.

Suggestions? Did I get the procedure correctly off the video? I see nothing on a Luminosity layer as in the tutorial.

*Using Photoshop CS3, running on an Intel PC with Win XPP, SP2. .NET2 SP 1 installed.
Attached Images
File Type: jpg Comit-B-orig-web.jpg (80.1 KB, 104 views)
File Type: jpg Comit-B-1-flt-crp-FFT-web.jpg (77.6 KB, 96 views)

Last edited by Joe Townsend; 06-18-2008 at 12:08 PM. Reason: Adding info and questions
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  #103  
Old 06-20-2008, 01:40 AM
jhumur jhumur is offline
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Re: Using the FFT filter to remove photgraphic pap

Hi, many of my stars have prominent flares in the horizontal and vertical axes. Should I paint over the flares?
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  #104  
Old 06-20-2008, 04:49 PM
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Darkhorse Darkhorse is offline
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Re: Using the FFT filter to remove photgraphic pap

Joe,

This type of paper texture is realllllllyy hard to eliminate with retouching. I'll bet you'll have better luck playing with lighting the original and copying with camera. Is that possible, or do you have this only as a file (.jpg or whatever)?

-DCW
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  #105  
Old 06-20-2008, 05:18 PM
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lurch lurch is offline
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Re: Using the FFT filter to remove photgraphic pap

I've found that fft processing (at least with ImageJ) does very little to improve this diagonal waffle texture. I've had success with Topaz de-noise/equalizer - but it's not free.
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  #106  
Old 06-20-2008, 05:22 PM
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0lBaldy 0lBaldy is offline
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Re: Using the FFT filter to remove photgraphic pap

Joe I used the free "Image Analyzer" (found here)

The steps were:
1. load image
2. filters>frequency domain filter
3. color all the bright star looking thingys except for the middle top (preview every once in a while)
4. OK
5. save

There are still work to be done but there is a big difference
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File Type: jpg Comit-B-orig-web_Imageanalyzer.jpg (72.9 KB, 101 views)
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  #107  
Old 11-30-2008, 11:45 AM
Bill Forster Bill Forster is offline
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Re: Using the FFT filter to remove photgraphic pap

The TUTORIAL sounds great!
http://retouchpro.com/tutorials/?m=show&id=185

BUT I am an Apple Mac user. Does the recommended filter work OK on an Apple with Mac OS 10.5 (Leopard)? And is it a free download? Or ....?

I am NOT an expert - and never will be! - but I have agreed to scan ten years of school leavers photos from my old school from 1939 - 49. Many of the ex pupils are marked "killed in action". And all of the photos are on matt paper. The scans loose all mid range tones due to being printed on matt paper. I want to be able to send the "old boys" - or their families if dead - scans by e-mail suitable for producing portraits.

Simple straight forward advice on whether this technique & this filter will work with Photoshop on my Mac would be greatly appreciated.

Bill
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  #108  
Old 12-11-2008, 02:31 PM
ngutman ngutman is offline
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Re: Using the FFT filter to remove photgraphic pap

Has anyone figured out how to use the FFT/iFFT filters in Photoshop Elements 5 or 6 or in Corel Paintsho Pro X?
Thanks,
Nathan
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  #109  
Old 12-11-2008, 02:51 PM
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0lBaldy 0lBaldy is offline
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Re: Using the FFT filter to remove photgraphic pap

Image Analyzer under Filters>Frequency Domain Filter (Free) Does a fine job.. Paint stars click OK
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  #110  
Old 02-13-2009, 01:09 AM
thepcmouse thepcmouse is offline
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Posts: 21
Re: Using the FFT filter to remove photgraphic pap

I got excited and wanted to try this image analyzer and before I installed I ran it through jotti and virustotal.
Found Trojan-PWS.Win32.LdPinch so ran it through virustotal and got the same thing from another antivirus program Esomething?
Has anyone else mentioned this?
The first one I downloaded was the zip file reporting same trojan, so I tried meesoft and downloaded non zipped and got the same trojan. I'm too paranoid anymore to get bad stuff on my computer. Has anyone else had this problem?
I was wondering if either olBaldy or Lurch still has the original downloaded file, if so could you run it through the online scan and see if you get the same thing? I would appreciate it ever so much. I know there are false positives but I'm just so tired of wasting the best years of my life cleaning up my computer.
Thanks
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