Canon VarioPrint MICR i Series, Operation Manual

Page: 538 / 576

Overview of color validation metrics
A color validation test has a series of metrics that are calculated and evaluated when the test is
performed.
The tables lists all metrics that can be used in a color validation test. In practice, a color validation
test uses a small subset of the available metrics.
The measurements are the measured Lab values of the patches of the printed target chart of the
test.
△
E00 (Delta E 2000)
Metrics Description
Substrate ∆E00 Color difference in ∆E00 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 ∆E00 Highest color difference in ∆E00 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 ∆E00 Average color difference in ∆E00 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 ∆E00 The 95th percentile ∆E00 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 ∆E00 color differences
smaller than or equal to the metric value.
Maximum ∆E00 CMYK
solids Highest color difference in ∆E00 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 ∆E00 CMY
solids Highest color difference in ∆E00 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 ∆E00 RGB
overprints Highest color difference in ∆E00 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 2000,
△
E00 is the industry standard. (
△
E (Delta E) on page 413
)
• Refer to Patches of the target chart on page 409 to the read description of the patches.
Overview of color validation metrics
538 Chapter 15 - References
VarioPrint i-series MICR