There are no stupid questions....
There are no stupid questions....
- Subject: There are no stupid questions....
- From: email@hidden (Anthony Sanna)
- Date: Wed, 31 Oct 2001 16:31:58 -0600
but....
8-bit color = 256 shades/channel = 16,777,216 colors in RGB. Right?
The formula, therefore is the 2-bit information (0 or 1) to the eighth
power which equals 256 values. For a 3-channel, RGB image, the resultant
possible colors would then be calculated by taking 256 to the third
power, which results in 16,777,216 RGB colors.
So 14-bit information would yield 16,384 shades, and a 16-bit image would
produce 65,536 levels. Again, all this seems to square with the experts,
HOWEVER when I try to calculate the possible RGB colors by cubing these
numbers, my answers go off into the stratosphere. I use Bruce's Real
World (p79) as a reference.
8-bit = 256 shades = 16,777,216 RGB colors (all correct)
14-bits = 16,384 shades = 4,398,046,511,104 RGB colors (1st part correct)
8-bit = 65,536 shades = 281,474,967,710,656 RGB colors (1st part correct,
but instead of "almost 3 billion" colors as Bruce figures, I've got 281
trillion colors)
So..... What am I missing here? I just know it's going to be one of
those throw-up-the-arms, slap-the-forehead, and say "doh" answers.
...but then I haven't been much good at math since that trip in '68, when
I saw all these numbers & formulas float up through the top of my head
and drift off into space.
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