Re: Is there an HDM CMM for MacOS or Windows7-8?
Re: Is there an HDM CMM for MacOS or Windows7-8?
- Subject: Re: Is there an HDM CMM for MacOS or Windows7-8?
- From: Graeme Gill <email@hidden>
- Date: Thu, 07 Mar 2013 11:15:21 +1100
Roger Breton wrote:
> I notice some sensible differences between ACE / Adobe CMM and HDM CMM /
> LittleCMS CMM in Adobe InDesign.
>
> Like, I always end up with more magenta and yellow with ACE?
That's a bit surprising. I know that Adobe have gone to a lot of
trouble to ensure numerical accuracy of ACE, and that Marti
often cross checks LittleCMS against ACE.
There are a few interesting traps for the unwary CMM implementor
in in dealing with linear light (ie. RAW) RGB profiles if you
create an optimized for speed one step conversion, but that
shouldn't usually apply to CMYK. There could be some variation in
the nature of the interpolation within the grid (two common
choices are simplex (AKA tetrahedral) interpolation and
N-linear interpolation.
Do you have a specific example ? (ie. profile and the
values you were converting ?)
Graeme Gill.
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