[argyllcms] Re: Calibrating problems in darks areas

  • From: "Frédéric Mantegazza" <frederic.mantegazza@xxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Fri, 4 Jan 2008 14:48:10 +0100 (CET)

Le 4/1/2008, "Graeme Gill" <graeme@xxxxxxxxxxxxx> a écrit:

>> I'm wondering, whether it is an option in this case to turn the
>> britghtness as much down, so that the even the channel with the
>> brightest black level stops emitting light, and to let the calibration
>> curves apply (possibly different, and positive) black offsets for each
>> channel in order to achieve a proper black level and chromaticity?
>> Graeme, is this supported by dispcal?
>You can certainly do this kind of thing, although dispcal
>doesn't directly support it (ie. it doesn't guide such
>an adjustment). Perhaps monitoring the black point would
>be the way to see what's going on in this situation.

What if I first use spotread, to adjust the brightness to get very small
values (<0.1)?


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