# Re: SnapScan

From: Oliver Schwartz (Oliver.Schwartz@gmx.de)
Date: Wed May 03 2000 - 14:09:34 PDT

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  Hi,

  > To anyone using the SnapScan driver:
  >
  > How well does it function for you right now, and which model scanner do you
  > have?

  I have an Acer ScanPrisa 620 UT. It works, but the RGB offsets are noticeable.

  Other things which I noticed:
  1. There seems to be some kind of calibration problem. I can reproduce the
  problem mostly on grey-scale images with an area of about 50% grey value.
  Some columns (1 pixel width) have darker grey values than the
  immediate neighborhood.

  2. If I look at a histogram of a scanned image it is noticeable that it has
  "holes" for certain values, i.e. some rgb-values never get out of the scanner.
  I would expect to get a continous histogram if I scan a photo (which I do get
  if I use the scanner under windows).

  Oliver

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  - Next message: Steffen Kluge: "Re: SnapScan"
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