Certified Proof Manual - image2output - Support

Dialog Reference
‘Define Print Target’ Dialog
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Strict Standard
dE gray tones Ø: 3 4
dE skin tones max.: 5 6
dE skin tones Ø: 3 4
dE formula:
dE94
DELTA E FORMULA
The DELTA E FORMULA defines the calculation method for color deviations.
This option is only available if you have selected an Lab print
target and disabled the USE STANDARD TOLERANCES option.
Delta E
Numerical value that represents the ‘distance’ between two colors in the
CIE Lab color space. This formula was introduced in 1976 and is therefore
also known as ‘Delta E 1976’.
Delta E 94
A variant of the Delta E color distance formula published in 1994. It gives
more weight to chroma, which comes closer to what the human eye perceives.
Delta E 2000
Revision of the Delta E 94 formula, released in 2000.
Unlike Delta E 94, which assumes that L* correctly reflects the perceived
differences in lightness, delta E 2000 varies the weighting of L* depending
on where in the lightness range the color falls.
Delta E CMC
Color difference formula adopted by the Colour Measurement Committee
of the Society of Dyers and Colourists of Great Britain in 1984. It describes
color differences in the CIE LCh color space.
The human eye is more sensitive to chroma. Therefore, this formula
uses an equation which allows the setting of lightness and chroma factors.
CMC 2:1 means that lightness has twice the weighting of chroma.
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