[argyllcms] Re: FWA Compensation

  • From: Jan-Peter Homann <homann@xxxxxxxxxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Wed, 10 Dec 2014 13:28:20 +0100

Hello all,
M1 is D50 measuremnt with a defined UV part in the measuremnt lightning
and M2 a measuremnt with No UV in the measuremnt lightning. A comparison
of M1 and M2 measurements gives a clear indication of the amount of OBA
/ FWA in the measurement probe.


Am 10.12.14 12:08, schrieb Graeme Gill:
> robert@xxxxxxxxxxxxxxxxxx wrote:
> Hi,
>> As you are doing a new release, I don't suppose you would be able to add an
>> option for the i1Pro2 to measure UV on / off for spotread?
> No, that's a major amount of work, and I don't see having time
> for it at the moment.
>> i1Profiler has
>> this feature and it's very useful to get an estimate of how much FWA is in
>> the paper (for example, with a particular paper the b* reading is -15 with
>> UV and -4 without ... which gives a good indication of very high FWA
>> content).  [Also, by looking at the a* reading too it gives an idea of the
>> extent of the color shift due to the FWA. In the case of this particular
>> paper b* went from 3 with UV to 0.5 without, so quite a magenta tint caused
>> by the UV].
> Argyll already supports M0, M1 & M2 with the i1pro & i1pro2, as well as the
> more general FWA compensated readings. You don't need the UV on/off reading
> to do this.
> Graeme Gill.


homann colormanagement ----------- fon +49 30 611 075 18
Jan-Peter Homann -------------- mobile +49 171 54 70 358
Herzbergstr. 55 FG 3.01 -- http://www.colormanagement.de
10365 Berlin ---------- mailto:homann@xxxxxxxxxxxxxxxxxx

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