XPost: uk.comp.os.linux, alt.comp.microsoft.windows, alt.comp.os.windows-11   
   From: nospam@needed.invalid   
      
   On Fri, 11/14/2025 7:24 AM, Carlos E.R. wrote:   
   > On 2025-11-11 16:13, Paul wrote:   
   >> On Tue, 11/11/2025 8:19 AM, Java Jive wrote:   
   >>> On 2025-11-11 03:45, Paul wrote:   
   >>   
   >>>   
   >>>> Regarding scanners, there is the commercial scanner driver package for   
   old scanners.   
   >>>> That could allow you to access the old scanner from a 64-bit OS, for a   
   price.   
   >>>> (hamrick.com VueScan). The main concern for old scanner users, is whether   
   all   
   >>>> the capabilities of the scanner are available, when a novel driver is   
   used.   
   >>>   
   >>> Yes, I've heard that mentioned before.   
   >>>   
   >>> Tx.   
   >>>   
   >>   
   >> See if there is a Trial Version.   
   >>   
   >> One of the main benefits of old scanners, is the CCD based   
   >> ones (instead of CMOS sensor) have better depth of field   
   >> and most of the scans done on them will be in focus.   
   >> I have trouble on my CMOS based scanner, getting   
   >> the paper pressed hard enough to the screen for   
   >> a focused copy.   
   >   
   > Interesting. I have scanned some flat objects in the scanner, with some   
   relief, worked really well.   
   >   
      
   I scanned a sheet the other day, that had been folded   
   in a box. It's a sample sheet for testing scanners.   
      
   The text right next to the fold is in focus,   
   the text further from the fold is not. And it   
   is an appreciable degradation. It could affect   
   the accuracy of an OCR done on it. That is a CMOS   
   sensor, which is cheaper to make as the materials   
   are not as obscure as CCD sensor materials.   
      
   This is why I would recommend finding a scanner   
   with a CCD (charge-coupled device) sensor. Those don't   
   have the depth-of-field problem. That's what my old   
   scanner used.   
      
   In the picture here, you can see an "exaggeration"   
   of the value of a CCD sensor :-) The book shown would   
   be perfectly reproduced because the spine on the source   
   there is unrealistically compliant. You couldn't lay   
   War&Peace on the scanner and get the spine to lay that flat.   
   This is only 800DPI. But the scan surface is pretty large.   
      
   https://www.thescannershop.com/plustek-opticpro-a320e-flatbed-scanner/   
      
      Paul   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)