[argyllcms] Re: Calibrating the DTP94

Gerhard Fuernkranz wrote:

Even if it not clear how to override the factory calibration, I think it
should be pretty easy to modify dtp92_read_sample() to apply an
_additional_ 3x3 matrix to the captured XYZ values, before returning
them to the caller.


Yes, I did mention that possibility too, but I think Roger would
like to be able to use the instrument with other packages too.


Btw, do you know whether this is a three-filter instrument, or does it
possibly have even more than three filters/sensors?


I think that the DTP94 has four filters ("XYZx'"), and the i1Display
has 3 ("RGB"). The i1display has the scope for 4 (looking at the
hardware), but I don't know if there is actually a sensor fitted
to it, and I don't see any evidence that the standard software
uses such a thing. The X-Rite documentation could be interpreted to
mean that there is no sensor matrix in the DTP series, and that
the filters are assumed to be XYZ spectral sensitivities (after
the X and x' channels are blended).

Graeme Gill.

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