remove print pattern

[Tawe19]

this is a scan from an old photo.
   
the original photo had this pattern of dots throughout, i'm guessing that this was a 'feature' at the time.

does anybody know how I might reduce or eliminate the effect ?

many thanks

Tawe

[rich2005]

Yep, satin finish photographic paper, does not scan well.  There are various ways, scan the photo again upside down, invert the image, overlay on the original and use a layer mode.

I use the fast fourier transform (FFT) and for this the gimp_gmic_qt plugin from http://www.gmic.eu  
You do need the latest version 3.0.0 
https://gmic.eu/files/prerelease/gmic_gi..._win64.exe 
because as well as FFT there is a very new denoise filter and a sharpen filter.

The whole thing goes like this https://youtu.be/QzgYLRnc-_E   duration a couple of minutes.





Guessing that is only part of the photograph, you will need to experiment with the denoise and sharpen filters for best results.

   

[Tawe19]

Thank you very mush Rich.
Especially for the instructive video.

May I ask :  what is the significance of doing a repeat scan ?
(I suspect some new technique may be coming my way).

thanks,

T

[rich2005]

(12-06-2021, 07:01 PM)Tawe19 Wrote: May I ask :  what is the significance of doing a repeat scan ?
(I suspect some new technique may be coming my way).

It is this: https://www.gimp-forum.net/Thread-Cleari...4#pid12984

[denzjos]

Another option is using GMic-Qt / Repair / Descreen and then use the gimp despeckle filter (and eventually use 'sharpen')  :
   
   
   

[Tawe19]

(12-06-2021, 07:20 PM)rich2005 Wrote:

(12-06-2021, 07:01 PM)Tawe19 Wrote: May I ask :  what is the significance of doing a repeat scan ?
(I suspect some new technique may be coming my way).

It is this: https://www.gimp-forum.net/Thread-Cleari...4#pid12984

Thank you Rich
the link makes it easy to understand.

much appreciated

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(12-07-2021, 09:14 AM)denzjos Wrote: Another option is using GMic-Qt / Repair / Descreen and then use the gimp despeckle filter (and eventually use 'sharpen')  :

Thank you Denzjos  -  another excellent suggestion.

many thanks.

---

I would just like to take this opportunity to both Rich and Denzjos for their speedy responses and excellent solutions, which I'm sure will be useful to other users.

Many thanks.

[Tawe19]

Hello Everybody,

This was my finished version.

We required it for a family event, and were pushed for time.

It looks so much better than our starting version.

I could only have done it thanks to the marvellous help and guidance that I received here from the above members (Rich & Denzjos).  

Many thanks.

Best wishes for a happy and healthy new year.




   

[denzjos]

Outstanding, nice work

[Krikor]

(12-19-2021, 01:53 PM)Tawe19 Wrote: Hello Everybody,

This was my finished version.[...]

Wow! Excellent ! Bravo!