[Openicc] beyond 8-bit precission [was: new version of xcalib]

[Bob Friesenhahn]

On Tue, 8 Mar 2005, Kai-Uwe Behrmann wrote:
>
> What is the contrast ratio of film? Are todays LCDs and TV displays
> really that far from film contrast?

Using the black/white squares ANSI approach (vs unit on/off) I 
understand that film (the media itself, not printed or projected) has 
a contrast ratio of around 10,000:1 and CRTs/LCDs average about 300:1. 
Really good CRTs can offer 700:1 under carefully controlled 
conditions.

This means that film contrast ratios are much better than computers 
can currently display.

However, all is not lost since the contrast sensitivity of the human 
eye is only around 300:1.

Bob
======================================
Bob Friesenhahn
bfriesen at simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/