[argyllcms] Re: camera calibration targets
- From: Graeme Gill <graeme@xxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Fri, 12 Aug 2011 19:50:36 +1000
"Gerhard Fürnkranz" wrote:
> I'm actually wondering how the following note in the ICC spec should be
> interpreted?
>
> "5.1.11 XYZNumber
> ...
> "NOTE 2: Signed numbers are employed for this type to
> accommodate negative values arisiing during calculations."
Hi Gerhard,
I think the note is just and explanation as to why the encoding allows -ve
values,
even though they are not permitted in a profile. The assumption is that a
CMM
may use ICC encoded values for its internal calculation. Many early CMM's
did
this, although the trend is away from this sort of implementation.
cheers,
Graeme.
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