Digital BW, The Print

On Monday, December 22, 2003, at 07:07  PM, Paul D. DeRocco wrote:

>> From: Steve Kale [mailto:stevekale@...]
>>
>> Thanks.  I was jumping straight to the density equation from the Y 
>> values
>> from the Measure Tool without realising they need to be divided by 100
>
> Is the Y in XYZ a luminance value? I thought it was a green value, not 
> the
> same as the Y in xyY.

I also thought that this was the case, but according to the math 
equations on Bruce Lindbloom's site the Y in XYZ is equal to the Y in 
xyY.
http://www.brucelindbloom.com/

Carl