Sent: 2010-03-08 18:03:50 UTC (almost 2 years ago)

From: Pappy

Removing Matte Texture

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How can I remove the matte texture from photos I've scanned? I'm using the
'descreening' feature in my scanning software when I scan photos with the
matte finish, but it doesn't do the trick. I'm still left with mottled
scanned images. How can I remove this texture look in Gimp? I've tried doing
some Gaussian Blur and then Unsharp Mask, but am just not getting good
results. What am I doing wrong? Step by step instructions would be great
cause I'm still pretty new Gimp user. Please help, thanks!

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Sent: 2010-03-08 18:07:02 UTC (almost 2 years ago)

From: Olivier Lecarme

Removing Matte Texture

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Sandi P. wrote:

> How can I remove the matte texture from photos I've scanned? I'm using the
> 'descreening' feature in my scanning software when I scan photos with the
> matte finish, but it doesn't do the trick. I'm still left with mottled
> scanned images. How can I remove this texture look in Gimp? I've tried doing
> some Gaussian Blur and then Unsharp Mask, but am just not getting good
> results. What am I doing wrong? Step by step instructions would be great
> cause I'm still pretty new Gimp user. Please help, thanks!

Could you show us an example of what you get?

--

Olivier Lecarme

Sent: 2010-03-10 14:48:59 UTC (almost 2 years ago)

From: Pappy

Removing Matte Texture

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I appreciate you having a look at these. They are unedited, right from the
scanner. You can see them at:
http://www.flickr.com/photos/37318163@N04/

Img137 is a sample of matte finish processing that even with Gaussian Blur
and Unsharpening can't remove the texture look.
Img138 is an example of portrait texture that I'm having problems
removing/minimizing.
Thanks again.
Sandi

>
>Could you show us an example of what you get?
>
>

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Sent: 2010-03-10 16:53:08 UTC (almost 2 years ago)

From: Jay Smith

Removing Matte Texture

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On 03/10/2010 08:48 AM, Sandi P. wrote:
> I appreciate you having a look at these. They are unedited, right from the
> scanner. You can see them at:
> http://www.flickr.com/photos/37318163@N04/
>
> Img137 is a sample of matte finish processing that even with Gaussian Blur
> and Unsharpening can't remove the texture look.
> Img138 is an example of portrait texture that I'm having problems
> removing/minimizing.
> Thanks again.
> Sandi
>
>> Could you show us an example of what you get?

Sandi,

On Img137 (four people), is the shadow behind the people, especially
their heads, in the actual photograph or is that an artifact of
scanning? If the latter, then there is some other problem.

However, I am impressed that they look as good as they do.

My wife just scanned a couple hundred pictures of the same era as yours
on all sorts of photographic papers, including matte and textured. Your
results are in the 97% percentile as far as I am concerned.

When you start with crap -- which most old family photos are -- you
can't really improve upon them much. You may be able to minimize
further degradation, but you can't create quality where it does not exist.

Jay

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Sent: 2010-03-10 17:39:24 UTC (almost 2 years ago)

From: Olivier Lecarme

Removing Matte Texture

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Jay Smith wrote:

> On 03/10/2010 08:48 AM, Sandi P. wrote:
> > I appreciate you having a look at these. They are unedited, right from the
> > scanner. You can see them at:
> > http://www.flickr.com/photos/37318163@N04/
> >
> > Img137 is a sample of matte finish processing that even with Gaussian Blur
> > and Unsharpening can't remove the texture look.
> > Img138 is an example of portrait texture that I'm having problems
> > removing/minimizing.
> > Thanks again.
> > Sandi
> >
> >> Could you show us an example of what you get?
>
> Sandi,
>
> On Img137 (four people), is the shadow behind the people, especially
> their heads, in the actual photograph or is that an artifact of
> scanning? If the latter, then there is some other problem.
>
> However, I am impressed that they look as good as they do.
>
> My wife just scanned a couple hundred pictures of the same era as yours
> on all sorts of photographic papers, including matte and textured. Your
> results are in the 97% percentile as far as I am concerned.
>
> When you start with crap -- which most old family photos are -- you
> can't really improve upon them much. You may be able to minimize
> further degradation, but you can't create quality where it does not exist.

Moreover, the samples here are so small that it is impossible to really
appreciate the quality and do anything useful. You should scan at 300dpi
at the very least.

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Sent: 2010-03-10 18:02:14 UTC (almost 2 years ago)

From: Norman Silverstone

Removing Matte Texture

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> > On 03/10/2010 08:48 AM, Sandi P. wrote:
> > > I appreciate you having a look at these. They are unedited, right from the
> > > scanner. You can see them at:
> > > http://www.flickr.com/photos/37318163@N04/

>
> Moreover, the samples here are so small that it is impossible to really
> appreciate the quality and do anything useful. You should scan at 300dpi
> at the very least.

I agree with the comments and would add that if you really want to
achieve the best possible than scan at 600dpi and take it from there.

Norman
>

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Sent: 2010-03-10 20:04:42 UTC (almost 2 years ago)

From: Lawrence Gray

Removing Matte Texture

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On 10/03/2010 12:02 PM, Norman Silverstone wrote:
>
>>> On 03/10/2010 08:48 AM, Sandi P. wrote:
>>>
>>>> I appreciate you having a look at these. They are unedited, right from the
>>>> scanner. You can see them at:
>>>> http://www.flickr.com/photos/37318163@N04/
>>>>
>
>
>> Moreover, the samples here are so small that it is impossible to really
>> appreciate the quality and do anything useful. You should scan at 300dpi
>> at the very least.
>>
> I agree with the comments and would add that if you really want to
> achieve the best possible than scan at 600dpi and take it from there.
>
> Norman
>
>>
>
>

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>
>
>
I had the same problem as you, scanning more than a thousand family
photos and doing some restoration on each of them. When dealing with
photos that were on a textured paper, and I had a lot, I used a plugin
called 'GREYCstoration' to remove the texture.

It is a complicated plugin and I had to do a lot of experimentation to
produce acceptable results. But two details that I do remember at this
time was to scan at high enough resolution so the texture is well
defined, I recall 450 dpi in my case and do not use an unsharp mask
until the texture is removed.

The plugin has been part of and superseded by G'MIC from the same people
and can be obtained at
http://gmic.sourceforge.net/gimp.shtml
Look in the enhancement section

Good Luck

Lawrence

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