[argyllcms] Re: Black turning down problem (the -r trick)

Hello Alexey

On 13-Jan-2011, Alexey Gribunin wrote:
> Hello Graeme!
>
>> Not really. There is only one A2B table computed, and it's the smoothing
>> of that, that you are changing. All the different B2A tables are created 
>> from that one A2B table.
>
> By the way, are you making smoothing of input measurements itself? If 
> so, is it possible to make a key to export smoothed measurement data to 
> ti3 file. I think it would be useful feature to see the difference 
> between original and smoothed measurements, this will help to make a 
> decision about smoothing level.

FYI... from what I'm experiencing, the most visible differences (call it
errors) rendering a testchart proof (absolute) with a heavily smoothed
profile and with an almost non smoothed one, is in the very dark and black 
patches.

The real matter also is that is not easy to make precise and predictable
measurements in those dark areas. Measurements tend to be noisy due to
instrument, to printing process and paper inconsistencies. For a good job,
one would better create a second additional target with many many dark patches,
possibly even duplicating ones, so that colprof can average them, all randomly
spreaded on the chart.

One annoyance in doing such things is that there's no automated way.
I at the end had to write custom dirty code to generate custom patches/spreads 
etc.
to be manually added to a ti1 file.
I'm still testing however.

/&

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