I always have thought that each step on a 8-bit 0-255 scale was the same
size, i.e., linear. The difference in grayness between 0 and 1, was the
same as 254 and 255, or 127 and 128. Is that not correct?
Tom C.
From: "William Robb" <[EMAIL PROTECTED]>
Reply-To: [EMAIL PROTECTED]
To: <[EMAIL PROTECTED]>
Subject: Re: state of the art 35mm DSLR
Date: Wed, 27 Oct 2004 18:20:42 -0600
----- Original Message ----- From: "Mark Roberts"
Subject: Re: state of the art 35mm DSLR
Assume 8 bit gray scale. That means 256 distinct shades of gray from
0 (full black) to 255 (full white).
A change from one shade to the next, say from level #240 to #241 is
very small in percent, but if you go from shade #1 to #2 it's a 100
percent increase.
Only if you're using a linear scale.
Don't scanner work on a linear scale?
William Robb
