Datacolor User to User Support Group.

On Feb 10, 2009, at 9:36 AM, Nathan Gutman wrote:

> Where and how does one set the 100 cd/m2?

It would be defined under measured luminance, in the white luminance  
blank.  Spyder3Elite offers this. Spyder3Pro does not (but you can  
lower your display's luminance before starting your calibration if you  
use Pro).
>
> What does BPC stand for?

Black Point Compensation. Its an automated adjustments of blacks when  
converting from one space to another for printing, invented by Adobe.  
Its not typically available from non-Adobe applications, and profiles  
need to be built differently for it, so if profiles are built for BPC,  
they tend to clog up in the shadows if used from non-Adobe  
applications. (If you don't believe this: build a profile for a matte  
art paper with the ColorMunki, and print through any intent except  
Perceptual, and watch your shadows clog!) We build our profiles for  
using without BPC, so that they can be used from any application. This  
is only problematic for Lightroom, where Adobe cleverly included BPC,  
without any option for turning it off! I am hoping that by the time  
they get the other features of Lightroom improved enough so that it  
can be considered a serious printing application, they will have  
added  a choice of all the rendering intents, and an option for  
turning BPC off as well...

C. David Tobie
Global Product Technology Manager
Digital Imaging & Home Theater
CDTobie@...