[argyllcms] Re: Averaging measurements
- From: Klaus Karcher <lists@xxxxxxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Tue, 22 Apr 2008 22:54:45 +0200
Martin Weberg wrote:
So, how do you (list people) average measurements in a more automated
manner?
As Gerhard mentioned, you can simply combine several ti3 files and let
profile do the rest -- but I can understand your demand to do this
beforehand (e.g. to check for measurement errors / inaccuracies, ...).
I use ProfileMaker's MeasureTool to average an compare measurement files
(averaging is one of the rare features that won't work without a dongle
unfortunately). MeasureTool is fairly handy, but it would be completely
overdosed to buy a PM license when you only need MeasureTool (it's not
available separately AFIAK). We have a ProfileMaker license for a long
time, but meanwhile the only parts of the package I use regularly are
MeasuerTool and ColorPicker -- argyll's profiles are simply better :-)
MeasureTool is great to quickly compare and average Measurement: It's
convenient to do such things in a GUI app and it's nice to get a visual
impression of the colors and differences you are dealing with.
Maybe ICC Examin will evolve into a open source alternative some day --
functions to edit, compare, average and evaluate measurement
statistically would complement it's 3D visualization functions very well
IMO.
One of MeasuerTools shortcomings are the missing 3D visualization
functions and the lack of tools to evaluate the *quality* (not only the
*quantity*) of differences: E.g. it's nearly impossible to discover or
analyze even the simplest systematic errors like hue, chroma or
lightness shifts with MeasureTool.
I use R <www.r-project.org/> to perform my analyses. I wrote a very
simple function to import CGATS files and implemented some basic color
related stuff (e.g a DE00 fuction). Of course averaging functions in all
flavors are already present in a statistical environment like R. When
I'm done, I export my data as text tables and add the headers manually
(whereas a simple CGATS export function could also be written with ease.)
Klaus
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