14->16
14->16
- Subject: 14->16
- From: email@hidden (Anthony Sanna)
- Date: Wed, 31 Oct 2001 16:53:18 -0600
Well, here's another dumb question that popped to mind after inquiring
about the number of colors in high-bit images.
Most good quality scanners that I know of scan in 14-bits (do any capture
16-bits?). Since this information gets passed on to Photoshop as 8 or
16-bit information, my question is how this 14-bit information (16,384
discrete shades/channel) is translated into 16-bit?
Reducing 14-bits to 8-bits is a pretty easy concept. Color information
is thrown away, much like rez'ing an image down (i.e.: 600 -> 300ppi),
and conversely, when you rez an image up, new pixels are extrapolated
from the existing data.
But when taking the 16,384 levels of 14-bit capture information and
fitting it into Photoshop's 16-bit bucket, do you end up with a bucket
filled with 65,536 shades of extrapolated information, or a 16-bit bucket
that's only a quarter full?
Tony
Anthony R. Sanna
Vice-President
SACO Foods, Inc.
6120 University Avenue
Middleton, Wisconsin 53562 USA
email@hidden
www.sacofoods.com
1-800-373-7226
(608) 238-9101
(608) 238-8149 - fax