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Mold (mould) marks over entire slde

Oct 1, 2014, 09:46
Post: #1
Mold (mould) marks over entire slde
    I'm pretty new to Gimp but have used other (inferior) image manipulation progams.

Problem: mold (or mould in UK) spots/marks over entire colour slide. I've attached a sample. Is there any way of removing these marks using Gimp? As you will see, if you can zoom in, there is not an area without these marks, so cloning is out (it would take a month of Sundays anyway, to deal with each mark).

I'm referring here to post-scanning because I have tried many different means of removing the spots physically from the slides (always seems to be on the emulsion side) and nothing works.

I had 2,600 slides in slide boxes (100 in each box, 50 in each of 2 trays) and they were stored for years in an unheated office stacked against an outside wall. The worst affected ones were the end ones nearest the wall. The majority are not too bad.

Thanks for any potential advice.
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Oct 1, 2014, 10:50 (This post was last modified: Oct 1, 2014 10:52 by rich2005.)
Post: #2
RE: Mold (mould) marks over entire slde
(Oct 1, 2014 09:46)IanG Wrote:  Problem: mold (or mould in UK) spots/marks over entire colour slide. I've attached a sample.

You might get a result, one that does not take forever, using a Gmic plugin filter(s)

http://gmic.sourceforge.net/

For speed, Iain's fast denoise might produce a reasonable result.

screenshot http://i.imgur.com/RrbmEu8.jpg

It does tend to blur, especially the grass, so I painted in a selection over the grass and some of the trees using the quickmask. Then inverted the selection. You can see blurred bits in places, depends how keen you are making the selection.

   

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Oct 1, 2014, 12:52
Post: #3
RE: Mold (mould) marks over entire slde
(Oct 1, 2014 10:50)rich2005 Wrote:  
(Oct 1, 2014 09:46)IanG Wrote:  Problem: mold (or mould in UK) spots/marks over entire colour slide. I've attached a sample.

You might get a result, one that does not take forever, using a Gmic plugin filter(s)

http://gmic.sourceforge.net/

For speed, Iain's fast denoise might produce a reasonable result.

screenshot http://i.imgur.com/RrbmEu8.jpg

It does tend to blur, especially the grass, so I painted in a selection over the grass and some of the trees using the quickmask. Then inverted the selection. You can see blurred bits in places, depends how keen you are making the selection.

Thanks for that Rich. I shall try those out when I get a bit of time, and report back - probably tomorrow - as I have to go out for the rest of the day.

I don't mind spending 20 to 30 minutes per slide if the result is worth it.
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