From: keith_nuttle@sbcglobal.net   
      
   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.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)