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Screening

Halftoning - Screening family

Syntax

XPath: /JDF[contains(@Types="Screening")]/ResourcePool/ScreeningParams/ScreenSelector/@ScreeningFamily

Type

String

Syntax

XPath: /JDF[contains(@Types="Screening")]/ResourcePool/ScreeningParams/ScreenSelector/@SourceObjects

Type

Enumeration

Supported values

@ScreeningFamily

Description

"Gradation"

Course halftoning

"Resolution"

Fine halftoning

"ErrorDiffusion"

Very fine halftoning

NOTE

The VarioPrint i-Series only supports @ScreeningFamily = "Gradation". Any other value in the ticket will be ignored and gradation is used instead.

The following table is valid for the colour printers with the exception of the imagePRESS C10000VP Series:

@SourceObjects

Description

“All” (default)

ScreeningFamily applies to all objects.

“ImagePhotographic",

"ImageScreenShot",

"SmoothShades”,

"LineArt"

ScreeningFamily applies to all objects except text. To be used when a Text ScreeningFamily is also provided.

“Text”

ScreeningFamily applies to Text only.

The following table is only valid for the imagePRESS C10000VP Series:

@SourceObjects

Description

"LineArt"

ScreeningFamily applies to graphics.

“ImagePhotographic",

"ImageScreenShot",

"SmoothShades”,

ScreeningFamily applies to images.

“Text”

ScreeningFamily applies to text.

Description

These settings define the screening method to use for text and for non-text.

Example: job with ErrorDiffusion for text and Gradation for the rest (images, graphics, …)

<JDF Types ="... Screening ..." ... >

<ResourcePool>

<ScreeningParams Class ="Parameter" ID ="ScreenID" Status ="Incomplete">

<ScreenSelector ScreeningFamily ="Gradation" SourceObjects ="ImagePhotographic ImageScreenShot LineArt SmoothShades"/>

<ScreenSelector ScreeningFamily ="ErrorDiffusion" SourceObjects ="Text"/>

</ScreeningParams>

</ResourcePool>

<ResourceLinkPool>

<ScreeningParamsLink rRef ="ScreenID" Usage ="Usage" CombinedProcessIndex ="index into Types for Screening"/>

</ResourceLinkPool>

</JDF>

Example: job with Gradation for all objects ("All" is default)

<JDF Types ="... Screening ..." ... >

<ResourcePool>

<ScreeningParams Class ="Parameter" ID ="ScreenID" Status ="Incomplete">

<ScreenSelector ScreeningFamily ="Gradation"/>

</ScreeningParams>

</ResourcePool>

<ResourceLinkPool>

<ScreeningParamsLink rRef ="ScreenID" Usage ="Usage" CombinedProcessIndex ="index into Types for Screening"/>

</ResourceLinkPool>

</JDF>

Halftoning - Screening frequency

Syntax

XPath: /JDF[contains(@Types=”Screening”)]/ResourcePool/ScreeningParams/ScreenSelector[@ScreeningType=”AM”]/@Frequency

Type

Double

XPath: /JDF[contains(@Types=”Screening”)]/ResourcePool/ScreeningParams/ScreenSelector[@ScreeningType=”AM”]/@SpotFunction

Type

NMTOKEN

Supported values

@Frequency

@SpotFunction

Description

200 (default)

Line (default)

200 lpi line

200

SimpleDot

200 lpi dot

125

SimpleDot

coarse dot screen

Description

This option specifies the frequency and spot function of the halftoning screens of PostScript/PDF jobs.

Example - 200 lpi dot halftoned job

<JDF Types="... Screening ..." ...>

<ResourcePool>

<ScreeningParams Class="Parameter" ID="ScreenID" Status="Incomplete">

<ScreenSelector Frequency="200" ScreeningType="AM" SpotFunction="SimpleDot"/>

</ScreeningParams>...

</ResourcePool>

<ResourceLinkPool>

<ScreeningParamsLink rRef="ScreenID" Usage="Usage" CombinedProcessIndex="index into Types for Screening">

</ResourceLinkPool>

</JDF>