[argyllcms] Re: Conversion omitting/locking device colorant

On Sun, Jan 11, 2009 at 11:06, Graeme Gill wrote:
> Martin Weberg wrote:
>> I could try this. Stripping the FOGRA39L data of all combinations
>> using K except for K=0. Then create a CMYK profile. Or should I also
>> strip the entire CMYK_K column creating a CMY-profile?
>
> Yes, the latter. The former won't work, since various things will fail
> if the device response doesn't occupy space in CMYK and PCS.

Ok. Thanks.

>> Studying marine biology I did a simulation lab using this sort of
>> thing. Just can't remember what the process/algorithm is called.
>> Maybe, you know a way of doing this?

Now I remember that I used a maximum likelihood function for
estimating model constants.

> It's either root finding or minimisation of an objective function.
> Naturally there are both these sorts of routines in Argyll itself :-)

Off course, didn't think of that. Is this something that could easily
be implemented using existing routines?

Martin Weberg

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