Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Editor P.O.V. 
Image Service" <editor@p...> wrote:
> nevnevsf wrote:
> 
> >FYI, I have made just such a set of ICC profiles for the MIS-FS 
> >Neutral inks on an 1160 printer on Enanced Matte and Crane Museo 
> >papers. I had to write my own software to do it, but it finally 
works 
> >well. I use a fully color-managed workflow and get very good, 
> >consistent results, with highly accurate previews. I can even mimic 
> >color filers, and see the effect on-screen! The inks are 
partitioned 
> >to minimize the dot patterns. I imagine the profiles are similar to 
> >the profiles produced by the Piezotone guys, but I found out about 
> >their efforts after I was nearly done, and they don't seem to have 
> >anything for MIS inks. 
> >  
> >
> 
> The obvious question for inquiring minds is:
> 
> What OS is the software written to work in?
> 
>  
> Keith Krebs
> 

I programmed it in Matlab, and it isn't very user-friendly. 

I've been meaning to write up what I did, but haven't done it yet. The 
algorythm is pretty straightforward, however. The main challenge in 
creating an ICC profile for x-tone printing is dealing with the highly 
non-one-to-one mapping between the tones the printer produces and the 
RGB values sent to it - the same gray tone is produced by many 
different RGB values. They key is to find the RGB values for each 
lighness value that produces a gray which has minimal dot pattern. It 
boils down to studying the pattern produced by the printer for each 
RGB value sent to it, and choosing a trajectory in RGB space which has 
minimal dot pattern. I tried to do it automatically, but it was easer 
just to take 10 minutes and study the pattern manually. I then map 
each point on that trajectory to a lighness value (the L* channel of 
the L*a*b* space). This is done automatically by the program, after 
scanning a few targets. The profile ignores the color (a*b*) channels. 
For an variable mix inks, like Ultratone, I could use the color 
channels to adjust the coolness and warmth of the inks. Alas, I've got 
a whole bunch of FSN inks that I'm working through, so playing with 
Ultratone inks isn't on my to-do list.

Does anyone know whom should I contact about posting the FSN 1160 
profiles?