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Using the FFT filter to remove photgraphic paper texture

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  #91  
Old 10-08-2007, 07:53 AM
oppor2nity oppor2nity is offline
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Re: Using the FFT filter to remove photgraphic paper texture

Thanks, but now I'm even more confused.

Would you please be able to tell me how you produced the great result you posted? I'm usually proficient with similar things and don't give up easily, but with ImageJ I have no idea where to start.

I can only find references to before-and-after comparisons, no clues as how to actually perform the actions.

I tried based on my experience with the FFt in Photoshop, but all I ended up with was one window with the original image, and after applying FFT one window with the little stars. I was unable to make the brush work, so drew squares and filled them - with black as I can't find how to change the fill colour.

When the main stars are covered, I invert the FFT and this results in a window all filled with black. I could copy and paste this into the original image window, but this only gave me another window filled with black.

And how did you figure out how to perform this procedure?

Cheers,

/Ulf
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  #92  
Old 10-08-2007, 08:42 AM
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chillin chillin is offline
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Re: Using the FFT filter to remove photgraphic paper texture

In imageJ:
1. Open file
2. Go to Process>FFT>FFT Options
3. Check Complex Fourier Transform
4. Click OK
5. Next: Process>FFT>FFT
6. Cover the stars with the brush tool
7. Process>FFT>inverse FFT
8. Save
Done

Following byRos method you will get the same results.
Attached Images
File Type: jpg imageJ1.jpg (84.5 KB, 108 views)
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  #93  
Old 10-08-2007, 08:41 PM
oppor2nity oppor2nity is offline
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Re: Using the FFT filter to remove photgraphic paper texture

Thanks, I tried it again while waiting for a reply and for some reason, even though I did exactly the same as before, I got a completely different result; albeit a so-so one. Then ImageJ stopped working as it couldn't "Create the Java Virtual Machine". I uninstalled and re-installed to no avail. Uninstalled all Java components, reinstalled Java, then ImageJ. Works fine now. Tried your workflow (the "Complex" checkbox did it) and got a sequence of good results, by creating an inverse FFT, then painting some more, then creating another inverse FFT, etc.

Thanks for all your help.

/Ulf
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  #94  
Old 10-10-2007, 02:06 AM
Michele_Verona Michele_Verona is offline
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Re: Using the FFT filter to remove photgraphic paper texture

Very nice forum, I'm an italian reader and your english is simple and easily understanded from me :-)

Regards,
Michele
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  #95  
Old 02-26-2008, 03:39 AM
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spasquini spasquini is offline
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Re: Using the FFT filter to remove photgraphic pap

I wrote an italian version of this tutorial, but using the patch tool, instead of a grey brush, on the whit dots, and I think that the result is better. Try it.

http://www.psdrevolution.it/forum/in...howtopic=31545

I added also a link back to here, as credits.
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  #96  
Old 04-15-2008, 10:33 AM
JenRS JenRS is offline
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Re: Using the FFT filter to remove photgraphic pap

I was so excited to see this tutorial and find out after years of frustration that there is a solution to that awful texture problem on some photographs.

I was all set to download the filter and give it a try.....except that link does not work anymore, the page does not exist. :o(

Can you please post an updated link to the file? Thank you!

Jennie
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  #97  
Old 04-15-2008, 11:21 AM
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byRo byRo is offline
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Re: Using the FFT filter to remove photgraphic pap

I've been looking around for an alternative.
The best I've found so far is from Kamlex.

(not sure, but it seems that it has the same size limit of 3000 pixels)


Just do a search on the Web "Kamlex FFT"

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  #98  
Old 04-15-2008, 12:04 PM
JenRS JenRS is offline
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Re: Using the FFT filter to remove photgraphic pap

Thanks for the quick reply and the info. I downloaded it from www.kamlex.com and am looking forward to trying it out!!!

Thanks again!

Jennie
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  #99  
Old 04-15-2008, 12:59 PM
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0lBaldy 0lBaldy is offline
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Re: Using the FFT filter to remove photgraphic pap

????
Are the FFTs found at:
http://www.skeller.ch/ps/fft_action.php
or
http://home.planet.nl/~ber03728/4N6s...ugin/getit.htm

any different than the one at:
www.kamlex.com
????
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  #100  
Old 04-15-2008, 07:14 PM
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byRo byRo is offline
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Re: Using the FFT filter to remove photgraphic pap

Quote:
Originally Posted by 0lBaldy View Post
...any different?
The two links you posted lead to copies of the Alex Chirokov plug-in.
Thanks.

I just reasoned that it would be better to point to an active (equivalent) filter-maker than to one who has "retired" his page.

I can't testify as to what's inside the filters.
They seem to work equally (haven't compared them yet. The Kamlex filter needs the .NET framework and I didn't have it here at home).

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