(v13) Bump-up curve arrays

This page applies to Harlequin v13.1r0 and later; and to Harlequin Core but not Harlequin MultiRIP.

The array contains a number of (X,Y) pairs each representing a point on the /BumpUpCurve. The following conditions must be met (which are slightly different to those for a normal calibration curve represented by the /Curve entry in a colorant subdictionary):

• the array must contain at least 2 number pairs

• the X values must exactly cover the range 0.0 to 1.0 (that is, the first number in the array must be 0.0 and the second last must be 1.0).

• both X and Y values must be at least weakly monotonic (that is, a duplicate X or Y value is allowed to represent a vertical or horizontal curve section), but an X value may not be lower than an X value earlier in the array and a Y value may not be lower than a Y value earlier in the array.

• The RIP connects the points using straight lines. The purpose of this parameter is to allow adjustment of the highlight values in flexographic printing. One /BumpUpCurve is used for all color channels.