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Page 491
Name
Data Type
Description
ImageMaskTrapping ?
boolean
Controls trapping when the TrapZone contains a stencil mask.
A stencil mask is a monochrome image in which each sample is
represented by a single bit. The stencil mask is used to paint in the
current color: image samples with a value of 1 are marked, samples
with a value of 0 are not marked.
When false, none of the objects covered by the clipped bounding
box of the stencil mask are trapped. No traps are generated between
the stencil mask and objects that the stencil mask overlays. No
traps are generated between objects that overlay the stencil mask
and the stencil mask. For all other objects, normal trapping rules
are followed. Two objects on top of the stencil mask that overlap
each other may generate a trap, regardless of the value of this
parameter. When true, objects are trapped to the stencil mask, and
to each other. Default = system specified
ImageToImageTrapping ? boolean
If true, traps are generated along a boundary between images. If
false, this kind of trapping is not implemented.
Default = system specified
ImageToObjectTrapping ? boolean
If true, images are trapped to other objects. If false, this kind of
trapping is not implemented. Default = system specified
ImageTrapPlacement ?
enumeration
Controls the placement of traps for images. Possible values are:
Center – Trap is centered on the edge between the image and the
adjacent object.
Choke – Trap is placed in the image.
Normal – Trap is based on the colors of the areas.
Spread –Trap is placed in the adjacent object.
Default = system specified
ImageTrapWidth ?
New in JDF 1.2
number or
XYPair
[GCM528]
The width in points of a trap between an image and any other obect.
A value of zero implies that no traps are created between any image
and its abutting objects. Legal values are greater than or equal to
zero. Values greater than the system specified maximum are clipped
to that maximum value. Defaults to TrapWidth.
MinimumBlackWidth ?
number
Specifies the minimum width, in points, of a trap that uses black
ink. Allowable values are those greater than or equal to zero.
Default = 0
SlidingTrapLimit ?
number
A number between 0 and 1. Specifies when to slide traps towards a
center position. If the neutral density of the lighter area is greater
than the neutral density of the darker area multiplied by the
SlidingTrapLimit, then the trap slides. This applies to vignettes and
non-vignettes. No slide occurs at 1. Default= system specified