Digital BW, The Print

Daniel,

Looks about right.  I came up with approx. the same partition numbers  
using Apple's DigitalColor Meter utility on your scan.  Only other  
suggestion I have would be to try varying the GRAY_HIGHLIGHT and  
GRAY_SHADOW values.  If you start with minimal values of 0.01 for each  
and can get a smooth convex curve then linearization should work  
(However, I think you need absolute density data for the  
linearization.).  If not, it may be necessary to adjust the highlight  
and shadow values higher to get closer to an optimal curve before doing  
the linearization.

Carl
On Thursday, August 7, 2003, at 09:42  AM, Daniel Staver wrote:

> Carl,
>
> here's a scan of the chart after I set the ink limit to 70:
> http://daniel.staver.no/img/qtrcalib1.jpg
>
> Don't mind the measured values I've written there, my densitometer  
> gives
> me values totally unlike the values I typically see quoted here, but
> seems to work well for linearization anyway.
>
> The paper is EEM and the inks are Ultratones with Eboni black.
>
> --
> Daniel Staver
> http://daniel.staver.no
>
>> The partition values seem to be too high.   Do you have a scan of the
>> second calibration chart, with the default ink limit set to 70 so we
>> can see where you set the partition values?  For comparison, take a
>> look at Roy's default 1280-VM-GRAY descriptor file below.
>
>
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