Output Color Conversions Overview
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The Output Color Conversions overview lists all available conversions.
Output Color Conversion list
This is the list of all the available output conversions. Select a conversion in the list to see more information in the pane on the right.
Convert Process Colors
Here you choose when and how to convert process colors.
Color Conversion method
Choose a conversion from the drop-down list:
•Don’t Convert: Choosing this option hides all the options for process color conversions.
•Repurpose: Choose this method to repurpose for different output devices. Repurposing triggers a specific output conversion that preserves the GCR of the input colors while applying a color conversion. If you choose this method, you can only set the Rendering Intent.
•ICC-based conversion: Choosing this option shows all the process color conversion options. This output color conversions triggers the standard ICC conversion that applies the GCR of the output press profile.
•Use device link: Choose a device in the drop-down list. This list is empty by default and device links can be added in the Device Link Profiles resource.
Rendering Intent
If you selected ICC-based color conversion, choose a rendering intent from the drop-down list:
Relative Colorimetric
A colorimetric conversion, tries to maintain the exact relationship (Smallest Delta E), between in-gamut colors, while out of gamut colors will be clipped. With Relative Colorimetric RI the white point from source color space is mapped to the white point of destination, this means that white stays white. No ink will be placed in white areas.
Perceptual
Perceptual aims to preserve the visual relationship between colors so it is perceived as natural to the human eye. The relationship between out of gamut colors is maintained. This can result in inaccuracies for in gamut colors as well.
Saturation
Saturation tries to produce vivid colors in an image at the expense of color accuracy.
Absolute Colorimetric
Absolute Colorimetric rendering intent is similar to Relative except that here the white point of the two profiles is preserved. White of source color space is simulated with CMYK values from the destination color space. The consequence is that every white object/area is covered with certain ink amounts.
Absolute Colorimetric + Preserve White
By default, Absolute Colorimetric + Preserve White is the Output Color Conversion setting for spot colors. This rendering intent uses absolute colorimetric rendering for the solid spot color tints and smooths out towards relative colorimetric rendering for the highlights tints of the spot color, ensuring that no background simulation is present in the output (typically for white objects when rendering absolute colorimetric).
NOTE: The result of choosing a rendering intent depends on the graphical content of documents and on the profiles used to specify color spaces. Some profiles produce identical results for different rendering intents. Differences between rendering intents are apparent only when you print a document or convert it to a different working space.
Black Point Compensation
Apogee uses a built-in algorithm to adjust for differences in the black points. Choose On or Off.
Profile Link Exceptions
If you selected ICC-based color conversion or Repurpose, choose an exception from the drop-down list:
•None
•Keep 100% K
•Normal
•Preserve K
•Preserve Pure Colors
•other exceptions as listed in the Profile Link Exceptions resource
Prevent Overprint issues
Select this option to preserve zero CMYK. For ICC based conversions, this option prevents overprint changes during color conversion. This option is always enabled for repurposing conversions.
Convert Spot Colors using Color Books
Accurate spot color mixing
This improves spot color overlaps significantly. Choose Off or maximum 2, or 3 colors.
deltaE calculation
Select the method to calculate the deltaE:
•deltaE*ab: Use the ΔΕab method, the first internationally endorsed color difference formula as published by the CIE Committee. This is the default value for reasons of compatibility.
•deltaE*00: Use the ΔΕ00 method, a revision of the ΔΕ94 formula. ΔΕ00 is the industry standard formula to be used.
•default: Use the default method.
Paper white
If ‘Use white point from Press Profile’ is selected, the paper white of the document profile is used in the color calculation. If this option is not selected, the paper white of the color book is used in the calculation of the spot colors.