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(v13) Auto-selection and bump-up curves for calibration

This page applies to Harlequin v13.1r0 and later; both Harlequin Core and Harlequin MultiRIP.

This section describes how to group calibrations so as to allow the RIP to select the calibration that best matches the halftone in use. The RIP accepts calibrations via the setcalibration operator which is an extension to the PostScript language, and which takes a dictionary operand:

<< calibration dictionary >> setcalibration

See also The PostScript setcalibration operator.

There are two possible formats for the calibration dictionary, the type 5 format, which does not allow auto-selection of calibrations from a group or the use of bump-up curves, and the type 6 format which does.

In the Harlequin MultiRIP (HMR) this dictionary is automatically constructed from the calibration information in the Page Setup, or it may be set up via the PushCalibration interface. These two routes allow the user to supply measurement data to the RIP which then automatically works out the required calibration curves for the dictionary. In the Harlequin Core (HHR) the calibration dictionary may be automatically set up via the PushCalibration interface, or it can be explicitly provided in the TestConfig file.

For information on PushCalibration see Technical Note Hqn081.

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