â–³E76 (Delta E 1976)
Metrics Description
Substrate ΔE76 Color difference in ΔE76 between the measured and the reference
substrate white. For a side-by-side evaluation, the color control strip
must be printed with the rendering intent absolute colorimetric. The
reference substrate white is compared to the measured simulated
substrate white of the printed media.
Maximum ΔE76 Highest color difference in ΔE76 between the measured Lab values
of the color patches on the color control strip and the Lab values of
the matching patches of the reference printing condition.
Average ΔE76 Average color difference in ΔE76 between the measured Lab values
of the color patches on the color control strip and the Lab values of
the matching patches of the reference printing condition.
95th percentile ΔE76 The 95th percentile ΔE76 color difference between the measured Lab
values of the color patches on the color control strip and the Lab val-
ues of the matching patches of the reference printing condition. This
means that 95% of all measured patches have ΔE76 color differences
smaller than or equal to the metric value.
Maximum ΔE76 CMYK
solids
Highest color difference in ΔE76 between the measured Lab values
of the CMYK solid patches on the color control strip and the Lab val-
ues of the matching patches of the reference printing condition.
Maximum ΔE76 CMY
solids
Highest color difference in ΔE76 between the measured Lab values
of the CMY solid patches on the color control strip and the Lab val-
ues of the matching patches of the reference printing condition.
Maximum ΔE76 RGB
overprints
Highest color difference in ΔE76 between the measured Lab values
of the RGB overprint patches on the color control strip and the Lab
values of the matching patches of the reference printing condition.
NOTE
• Delta E 1976, △E76 is based on a less complicated and accurate distance calculation. (
â–³E
(Delta E)
on page 251)
• Refer to
Patches of the target chart
on page 248 to the read description of the patches.
â–³H (Delta H)
Metrics Description
Maximum ΔH CMYK sol-
ids
Highest color difference in ΔH between the measured Lab values of
the CMYK solid patches on the color control strip and the Lab values
of the matching patches of the reference printing condition.
Maximum ΔH CMYK sol-
ids and RGB overprints
Highest color difference in ΔH between the measured Lab values of
the CMYK solid patches and the RGB overprint patches on the color
control strip and the Lab values of the matching patches of the refer-
ence printing condition.
Maximum ΔH CMY sol-
ids and RGB overprints
Highest color difference in ΔH between the measured Lab values of
the CMY solid patches and the RGB overprint patches on the color
control strip and the Lab values of the matching patches of the refer-
ence printing condition.
4
Overview of color validation metrics
438
Chapter 15 - References
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