17 Aug
2006
17 Aug
'06
7:26 a.m.
On Thu, Aug 17, 2006 at 08:52:15AM -0400, Barry Watzman wrote:
RE:
My job requires that I provide receipt copies of *every* expense I claim, no
matter how small. I always scan the receipts at 1bpp, just to convey my
irritation.
Surprisingly, B&W 150dpi scans are typically very legible. I'm sure it
wouldn't be good for OCR, even at a higher resolution, but it's usually
readable even if the original is on colored paper.
Doc
>I scan at 300 DPI MINIMUM for everything, but
I sometimes scan at 600
>dpi if there is extremely fine detail present.
Agreed on the DPI front. What I tend to find
unacceptable though,
even on pure textual material, are bi-level scans - too much
information from the original is lost"
********
Agreed. I NEVER scan anything as "black and white" (each pixel is black or
white). It just does not work well, ever, even for pure text that you would
think really is "black and white". I always scan monochrome material, even
text, as "grayscale". However, 8 bit depth (256 shades of gray) is all that
you need for such monochrome material (in fact it's even more than you
need), even if the scanner supports a greater depth.