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Old Photographs, Recognition, Handwriting Deciphering => Free Photo Restoration & Date Old Photographs => Photograph Resources, Tips, Tutorials => Topic started by: waynenort on Monday 12 October 20 01:30 BST (UK)
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For those wanting to remove/suppress halftone dots and patterns from photos, I came across this free plugin (for photoshop users) with a tutorial on how to use it.
http://ft.rognemedia.no/
It does a reasonable job. Here's an example I tried with an image of my late father.
The only adjustment I made after using the plugin was to adjust the curves - to boost the dark and light tones and see how much of the patterning was removed.
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I referenced it last Friday. I think you were on the thread.
In the olden days (i.e. 10 years or so ago) we used an FFT (fast fourier transform) plugin filter to remove unwanted texture like this. I've not go one anymore and can't seem to find one onlne. There must still be one available somewhere.
Found this
http://ft.rognemedia.no/
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Fast Fourier Transform programs are not new. We used them 10-15 years or more ago. (See some very early threads of this board)
It very much depends on the original scan. Ones with jpeg artifacts and other damage don't come up very well.
I see you still have horizontal bands.
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Some earlier discussions/refs to FFTs
https://www.rootschat.com/forum/index.php?topic=245600.msg1343888#msg1343888
https://www.rootschat.com/forum/index.php?topic=752815.msg6308888#msg6308888
https://www.rootschat.com/forum/index.php?topic=772024.msg6250570#msg6250570
https://www.rootschat.com/forum/index.php?topic=773174.msg6262677#msg6262677
https://www.rootschat.com/forum/index.php?topic=698886.msg5420788#msg5420788
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Would wavelets do the trick?
It's a subject I looked into over 10 years ago, but decided I wasn't quite bright enough.
The old brain has atrophied more since then.
I used to get quite good results with photos scanned using Microsoft Photo Editor if I declared the image as type 'Magazine'. Can't now get the program to save scanned images. Is there a version for Windows XP still available for (free) download?
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Fast Fourier Transform programs are not new. We used them 10-15 years or more ago. (See some very early threads of this board)
It very much depends on the original scan. Ones with jpeg artifacts and other damage don't come up very well.
I see you still have horizontal bands.
Oops didn't read the entire thread.
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I tried GIMP the other day and wasn't happy with the results and spent ages looking at MORE plugins designed to cure the problem, but, I tried again today and played with every filter to see what happened.
Eventually I stumbled on applying 'Canvas' and then 'Gaussian Blur' and hey presto! all it needed then was adjusting Contrast. What do you think?
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Oops didn't read the entire thread.
Don't worry - it's well worth discussing the various ways of getting rid of various patterns. Unfortunately none are fool proof. It's also best for such photos to have as little jpg compression as possible - or be scanned in a non-lossy format.
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Just found this for anyone with PS:
https://community.adobe.com/t5/photoshop/removing-newsprint-pattern-from-photos/td-p/7645875?page=1
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Just followed the instructions with th Arkengarth school pic. Hee's the result (smaller size).
It does remove the paterning but is too blurry for my liking. The quality of the original is very poor. It's worth trying it with a decent scan.
Gadget
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Applying the method to original image on 1st post
(It needs a bit of sharpening but no bands :D )
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I tried GIMP the other day and wasn't happy with the results and spent ages looking at MORE plugins designed to cure the problem, but, I tried again today and played with every filter to see what happened.
Eventually I stumbled on applying 'WEAVE' and then 'Gaussian Blur' and hey presto! all it needed then was adjusting Contrast. What do you think?
Don't have Gimp, so wasn't sure what the "weave" filter did until watching a quick vid - on it's normal use.
An interesting technique using it to help remove the halftone
Skin textures certainly looks smooth.
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Just found this for anyone with PS:
https://community.adobe.com/t5/photoshop/removing-newsprint-pattern-from-photos/td-p/7645875?page=1
Similar to what I tried too in the the Arkengarth school post. Also tried to combine it with the shadows highlights filter to force some detail back.
Tackling halftones is a difficult compromise, between trying to salvage detail and removing the pattern
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Sorry about that ... I misremembered how I achieved the end result ... it wasn't WEAVE ... it was CANVAS.
On the soldier's picture it worked because the Canvas added to the Horizontal Pattern and seemed to then Blur very well with Selective Gaussian Blur. Then I increased Contrast and slightly Sharpened it.
HOWEVER. I've just tried it with the Auchengarth School pic and because of the Angled Stripe the Canvas doesn't work. Messed about with more tools but couldn't improve it, so I stopped.
cheers, Ian
PS. GIMP is free and quite extensive with a trillion plug-ins available. Big learning curve though.
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My next random thought is to Copy & Paste the Auchengarth School photo and Re-Align it with the Angle Stripes running Vertically then adding Canvas etc!
off to try it now.
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Have now put it through another sharpening program in Nik collection.
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Just tried making the stripes run vertically and applying Canvas in GIMP then all the other processes but it doesn't work. Perhaps the Canvas Weave does not line up well enough with the stripes.
Have a look at Gadget's pic of the school on the ArkengarthSchool thread. The results are excellent even though it's a lot of work to have to go through ... My old school photos went on the school's website as copied from the local newspaper until former pupils dug out the originals from their attics and scanned them.
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Gadget, what is a NIK Collection?
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just now Googled Nik Collection and landed on their web site.. it was looking fabulous until I saw the prices ... they actually wanted real folding money .... it was like Dracula getting hit by a silver bullet
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I got mine for very cheap ages ago. Then it was taken over by Google and it became free. Now it's Dxo (or whatever).
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I got the Nik collection ages ago when you recommended it Gadget and I use it quite a lot, very useful.
I wish I knew half as much as you about photo editing and photography in general...but I get by ::) ;D ;D
Carol
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There are other apps that other restorers use that are probably better - Remini, Affinity, etc. - as you have to do a lot of jiggling with Nik.
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There are other apps that other restorers use that are probably better - Remini, Affinity, etc. - as you have to do a lot of jiggling with Nik.
Just gave Remini (android app) a try on the original image I posted here. While it didn't help remove the patterning from the original, it gave amazing results in sections of the second pattern suppressed image. Especially around the eyes, nose and mouth areas.
I didn't think this much AI detail could be generated from a 15mm x 20mm face in an old WWII photo.
It was the standard free one click option used in the Remini app.
Does the Remini Pro paid version give additions like adjustable filter intensity?
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I think Tomkin and Andy use it. I'm not sure if they have bought the app - I'm sure tomkin won't have bought it ;D ;D ;D
I think that they are for android and ios only.
I've just checked and My Heritage also uses them for their enhancements.
Gadget