[argyllcms] Re: Multiple issues with Argyll, please help

  • From: Graeme Gill <graeme@xxxxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Thu, 04 Sep 2008 00:57:22 +1000

Rajiv Mehra wrote:

longer because it averages multiple readings. I dont understand one thing. I 
disable
the screensaver when running Argyll.....so how does the screensaver come into 
the
picture? Or maybe (when you are testing) you are not disabling the screensaver?


As I explained, due to a feature (read bug) in Vista, the screen saver was
not being disabled, so by accident, I ended up taking readings of
the screensaver pattern, rather than the test colors. This resulted
in readings taking more than 30 seconds.


Quantization? I googled it....but still not sure about I understand it. These
colorimeters........dont they send out a reading every few seconds? Or is it a 
constant
stream of data?


They take a (single) reading when you ask them to. For something like
the i1display, the reading for each channel is typically an integer number
between 0 and 300 or so. If you're trying to take a reading of a signal
that should actually be 2.1, and the instrument always returns
the closest number it can 2, then averaging lots of 2's will never
give you 2.1.

Graeme Gill.

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