D65 exported data
D65 exported data
- Subject: D65 exported data
- From: "Mike Eddington" <email@hidden>
- Date: Mon, 1 Jun 2009 17:42:40 -0400
- Thread-topic: D65 exported data
I was comparing Lab measurements exported out of Profilemaker MeasureTool ast both D50 and D65, then attempted to do the same within a ColorThink worksheet from a single spectral data set, but got vastly different results. I would expect to get the same results.
In the first instance I open a spectral measurement file in MeasureTool and exported both D50 and D65 Lab values, then dropped in a Colorthink worksheet and compared them
Next, I dropped the spectral file in a worksheet, then dropped the same measurement file again, and changed the Color setup to CIEstdD65 (6430K) and compared. I was expecting near the same delta values as in the first method.
There appears to be a major difference between D65 out of MeasureTool and CIED65 (6430) in Colorthink..babelcolor patchtool have slightly different result to mesuretool.
.anyone care to comment?
Results below:
Exported from MeasureTool and compared in ColorThink:
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dE Report
Number of Samples: 1617
Delta-E Formula dE76
Overall - (1617 colors)
--------------------------------------------------
Average dE: 1.49
Max dE: 3.70
Min dE: 0.00
StdDev dE: 0.82
Best 90% - (1454 colors)
--------------------------------------------------
Average dE: 1.32
Max dE: 2.61
Min dE: 0.00
StdDev dE: 0.69
Worst 10% - (163 colors)
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Average dE: 2.95
Max dE: 3.70
Min dE: 2.61
StdDev dE: 0.27
--------------------------------------------------
Calculated D50 and CIEstdD65 within Colorthink and compared
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--------------------------------------------------
dE Report
Number of Samples: 1617
Delta-E Formula dE76
Overall - (1617 colors)
--------------------------------------------------
Average dE: 10.07
Max dE: 16.69
Min dE: 4.20
StdDev dE: 2.84
Best 90% - (1454 colors)
--------------------------------------------------
Average dE: 9.50
Max dE: 13.92
Min dE: 4.20
StdDev dE: 2.39
Worst 10% - (163 colors)
--------------------------------------------------
Average dE: 15.10
Max dE: 16.69
Min dE: 13.96
StdDev dE: 0.81
Mike
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