Re: Color Measurement
Re: Color Measurement
- Subject: Re: Color Measurement
- From: Graeme Gill <email@hidden>
- Date: Sat, 18 Jul 2009 17:21:52 +1000
Robin Myers wrote:
Just as the scale changes in going from dE 1976 to dE 2000, the
tolerance range also changes. Where 1 dE 1976 was "roughly" assumed to
be a Just Noticeable Difference (JND), now that number should be about
0.5 dE for a JND in dE 2000. As the scale changes, so does the
interpretation.
Do you have a reference for this ?
Looking thought the "The Development of the CIE 2000 Colour Difference Formula: CIEDE2000"
and "The CIEDE2000 Color-Difference Formula: Implementation Notes, Supplementary Test
Data, and Mathematical Observations" it isn't obvious that there is any intention
that the JND threshold be different.
This plot also seems to contradict this idea:
<http://www.digitalcolour.org/Difference.htm>
ie. differences of about 1 CIE 1976 DE are also close to 1 CIE DE2000 in
near the neutral axis.
Graeme Gill.
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