QTR-Quadtone RIP

--- In QuadtoneRIP@yahoogroups.com, "Roy Harrington" <roy@...> wrote:
> The "big dMax loss" is just one symptom that happens to be most 
> visible. .... How we actually know whether any profile is done 
> "correctly"?   I admit the dMax issue shows the problem, but other 
> color profiles "could" be done wrong and we might not know. ....  
> It's very weird to me that different CMSs with exactly the same 
> input can produce different results.

I am prepared to accept that different CMSs will produce slightly
different profile conversions.  While it would be nice to think of
conversions as being something that should be mathematically precise,
it sounds to me (as a non-expert) that in practice it's a little like
the differences between RAW converters - there are matters of
judgement involved.  But large differences surely indicate that
something is wrong somewhere.  

F_P