Thread View: comp.periphs.scanners
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Started by alan moore
Wed, 14 Jul 1999 00:00
silver nitrate emulsion
Author: alan moore
Date: Wed, 14 Jul 1999 00:00
Date: Wed, 14 Jul 1999 00:00
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i've an old photo that is playing havoc when i scan(microtek x6) it, most of
the original (so i've been told)is made with silver nitrate and it is this
that reflects thus making the scan very noisy indeed. i've tried pre-scan
filtering/descreen etc, post scan fiddling with corel pp9,taking a photo of
it (dc265) and it still looks shite. can anyone suggest anything please
a couple of bitters in the pump for you if can help
cheers adm
Re: silver nitrate emulsion
Author: Martin Brown
Date: Wed, 14 Jul 1999 00:00
Date: Wed, 14 Jul 1999 00:00
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alan moore wrote: > i've an old photo that is playing havoc when i scan(microtek x6) it, most of > the original (so i've been told)is made with silver nitrate and it is this > that reflects thus making the scan very noisy indeed. i've tried pre-scan > filtering/descreen etc, post scan fiddling with corel pp9,taking a photo of > it (dc265) and it still looks shite. can anyone suggest anything please A photograph taken with diffuse side lighting may be as good as it gets. I presume the problem is the black parts of the image look silvery ? Reminds me. I had a wierd problem a while back with a scanner which saw the red dye in the Fuji instant colour print material as sort of green. The scan results were unusable. Anyone else had funny behaviour with particular emulsions ? Regards, Martin Brown
Re: silver nitrate emulsion
Author: Mike Russell
Date: Sun, 18 Jul 1999 00:00
Date: Sun, 18 Jul 1999 00:00
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Try using a polarized light source and filter. The reflective silver areas should darken much more than the normal parts of the photograph. If this doesn't quite do the job, perhaps you can subtract two photographs made with different polarizer orientations, create a mask of the areas that changed value most strongly, then use that mask to selectively darken the silvered areas. alan moore wrote in message <7mi75j$r9$1@lure.pipex.net>... >i've an old photo that is playing havoc when i scan(microtek x6) it, most of >the original (so i've been told)is made with silver nitrate and it is this >that reflects thus making the scan very noisy indeed. i've tried pre-scan >filtering/descreen etc, post scan fiddling with corel pp9,taking a photo of >it (dc265) and it still looks shite. can anyone suggest anything please > > a couple of bitters in the pump for you if can help > cheers adm > >
Re: silver nitrate emulsion
Author: B.Rumary
Date: Mon, 19 Jul 1999 00:00
Date: Mon, 19 Jul 1999 00:00
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> i've an old photo that is playing havoc when i scan(microtek x6) it, most of > the original (so i've been told)is made with silver nitrate and it is this > that reflects thus making the scan very noisy indeed. i've tried pre-scan > filtering/descreen etc, post scan fiddling with corel pp9,taking a photo of > it (dc265) and it still looks shite. can anyone suggest anything please > *All* old B&W photos use silver nitrate in the emulsion! From what you say, you may have got hold of a Daquerretype (?). This was a very early photographic process, which was made on a thin metal plate, and forms the dark areas by reflection of light on the metal surface (I think!). Apparently these are the very devil to copy, due to the reason you stated. Brian Rumary, England http://freespace.virgin.net/brian.rumary/homepage.htm
Re: silver nitrate emulsion
Author: Kim Clark
Date: Mon, 19 Jul 1999 00:00
Date: Mon, 19 Jul 1999 00:00
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Take it to a photo developer, have them make a copy from the photo (they will actually take a photo OF the photo). THEN scan the picture and do with it what you will..... Hope this helps Roger D. Clark president@southwestohiofoods.com (on my wifes computer if you email, use the above address) alan moore wrote in message <7mi75j$r9$1@lure.pipex.net>... >i've an old photo that is playing havoc when i scan(microtek x6) it, most of >the original (so i've been told)is made with silver nitrate and it is this >that reflects thus making the scan very noisy indeed. i've tried pre-scan >filtering/descreen etc, post scan fiddling with corel pp9,taking a photo of >it (dc265) and it still looks shite. can anyone suggest anything please > > a couple of bitters in the pump for you if can help > cheers adm > >
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