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PDF20 Spec Annex P
Part of: PDF20-Spec-Index
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Annex P (informative) An algorithm to determine the actual blending colour space of a transparency group The diagram in this annex illustrates a possible algorithm to determine the blending colour space of a transparency group: •
Transparency groups that are non-isolated or isolated without CS entry always inherit their blending colour space from their parent group.
•
Isolated transparency groups with CS entry that is a CIE-based colour space use that CIE-based colour space.
NOTE
Isolated transparency groups with a device colour space as blending colour space first apply the default colour space mechanism.
In case of no valid default colour space remapping, the ancestor transparency groups are searched – starting with the nearest - for a possible blending colour space to inherit from. Page transparency groups, which do not have a parent, instead inherit their blending colour space from the output device, or from the output intent.
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© ISO 2020 – All rights reserved
ISO 32000-2:2020(E)
Figure P.1 — A possible algorithm to determine the blending colour space of a transparency group
© ISO 2020 – All rights reserved
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ISO 32000-2:2020
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