What is the difference between 8-bit and 12-bit images?
I notice that it takes twice as much space for a pnm file under 12-bit vs 8-bit.
When I used Sane 1.00 under SuSE 6.1, I was able to scan (xscanimage) 12-bit
images and view them in GIMP. But when I tried Sane 1.0.1 with Umax 1.0.1
back-end (Umax Astra 1220s), I was only able to scan in 8-bit mode. 12-bit
yielded purple text and green background. 8-bit looks good.
Ultimately, I will be using xscanimage to scan photographs. I have many photos
stored under 12-bit graphics, which were converted to JPGs, but now I cannot
scan in 12-bit. I would rather scan in 12-bit just to make sure that the
photos are the best they can be?
What is the difference, and is there a way to get Sane 1.0.1 to do 12-bit like
1.0 did?
I am using Umax Astra 1220s on a Slackware 7.0 system.
-- Rick Rosinski http://www.rickrosinski.com rick@rickrosinski.com --------------------------------------------------------- Rick Rosinski http://www.rickrosinski.com rick@rickrosinski.com
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