[Openicc] Drop size calibration

[Gerhard Fuernkranz]

Hal V. Engel wrote:
> I suspect that drop size calibration has a lot in common with calibrating the 
> light/dark ink transitions in CcMmYKk type printers.

Btw: This statement, which brings drop sizes and light/dark transitions
into relation, reminds me on another approach I have seen somewhere in
the literature. This approach does the dark/light splitting in the
dithering engine: It treats the e.g. 16 dot-on-dot overprint
combinations of the three dot sizes of "C" and the three dot sizes of
"c" as if they were 15 drop sizes of a single virtual cyan channel. Then
these 15 virtual drop sizes are sorted by density, and dithering is done
between the resulting 16 virtual levels. A requirement for this approach
is of course that the hues of the dark and light inks must match
sufficiently well, i.e. the dark inks should be basically the same
colorant as the light ones, but at a higher concentration. I have no
idea though, how well this approach works in practice...

> It is posted here:
> http://lprof.sourceforge.net/images/Channel-Error.jpg

Do you still have the tabulated measurements too?

Regards,
Gerhard