[argyllcms] Re: Issue reading illuminant spectrum

  • From: Graeme Gill <graeme@xxxxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Mon, 08 Nov 2010 03:02:49 +1100

Niccolò Belli wrote:
I became suspicious and I had a doubt, so I reversed the Colormunki:
http://darkbasic.homelinux.com/images/lamp_a_mode2.png

Level is 60! The ambient sensor is in a different position, it's on the
top of the instrument! O_o

Right, I suspected something like this. The color monkey sensor
rotates, and in ambient position it points upwards, through
the ambient adapter optics.

The two spectrum are very similar, but which mode is the best?

There may not be much in it. The ambient adapter is usually a cosine
adapter, which means that it's directional characteristic is
cosine shape. The normal characteristic is very directional, and
has a better signal to noise ratio, particularly at the blue end,
because it's not being filtered.

I had not been able to save the spectrum because under linux I get this
error with argyll 1.3.2 as soon as I close the plot window:

XIO:  fatal IO error 11 (Resource temporarily unavailable) on X server ":0"
      after 2174 requests (2170 known processed) with 0 events remaining.

I'll have to see if I can reproduce this error.

Graeme Gill.

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