Digital BW, The Print

Tom,

Photoshop rounds all L* values to integers and I don't know of any 
easy, painless way around that.  Since matte papers have L* values 
that usually go from the mid teens for shadows to 96-98 for 
highlights, and glossy papers go from single digits in shadows to 96-
98 in the highlights, you should be okay using integers.  Dividing 
the overall dynamic range by 21 still gives you about 4 L* units 
difference from step to step depending on the paper you are 
profiling.  You will still get a pretty darn good linearization.  
Spectros and densitometers can give you finer precision, but you may 
not see all that much of a difference as long as your scanner is 
reading raw data that hasn't been adjusted or converted during 
scanning.  (Auto features should be disabled when scanning).

Give it a try and see how it comes out.  

Lou

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Tom Husband" 
<thusband@s...> wrote:
> 
> I'm at the point of entering densities from the 21 step wedge and am
> using a scanner and PS CS to measure.  I've set the second info
> palette to LAB but when moving over the each density it only shows
> whole numbers and no decimal point in "L".  All the other QTR curves
> are out to three decimal places.  Is there a way to get PS CS to 
read
> that way?  I must be missing something.
> 
> Thanks,
> 
> Tom