From: rail@greywall.demon.co.uk   
      
   On 14/05/2020 23:56, knuttle wrote:   
   > On 5/14/2020 5:13 PM, Graeme Wall wrote:   
   >> On 14/05/2020 20:04, knuttle wrote:   
   >>> On 5/14/2020 11:15 AM, J. P. Gilliver (John) wrote:   
   >>>> My own experience with feed-mechanism scanners (on documents that   
   >>>> aren't particularly fragile) is that it's difficult to keep the   
   >>>> document straight; I haven't tried a desktop machine, though, only   
   >>>> the portable type (which I've always thought would be useful if I   
   >>>> was visiting someone else's home, and wanted to scan something they   
   >>>> didn't want to let leave their house but had a scanner).   
   >>> My solution to this is run the scans through a image processing   
   >>> program and clean it up before saving as a PDF   
   >>>   
   >>> By clean it up, I mean first square it to the paper to correct any   
   >>> missalignment caused by the scanner.  Once square, using the image   
   >>> processing tools to make the document more readable.  Mostly color   
   >>> corection, Red,green,blue, brightness, contrast, saturations, and   
   >>> Gamma correction.  Most of the time the gamma correction resolves   
   >>> most problems with the document.  The red,green, blue and other color   
   >>> adjustments can bring out things that were nearly lost when the   
   >>> document ages.   
   >>>   
   >>> While I can bring back the color to some photos, I still have not   
   >>> found software that can correct the Kodachrome and Kodacolor aging.   
   >>   
   >> I've found fiddling with the Hue settings helps. Mind you, if you   
   >> think Kodachrome is difficult, try Agfachrome!   
   >>   
   > I said Kodachrome but I also used Agfachrome.  In fact I preferred   
   > Agfachrome.   
   >   
   > It always seemed to me since chemical reactions are very predictable,   
   > that it would be easy to develop an algorithm to correct the color   
   > degradation of each chemical compound in the emulsion.  If each were   
   > applied to the picture,  seems like it could restore the original colors.   
   >   
      
   What software are you using?   
      
   --   
   Graeme Wall   
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   --- SoupGate-Win32 v1.05   
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