Images
ImagesbyApplication
Thefollowingtabledescribesimagerequirementsandsuggestedformatstofulfilltherequirements.
Requirement
Suggested
Comments
Blackandwhite
Smallfilesize
CITTG4TIFF
Thisisaverystandard,compactwaytostore
monochromeimages.
CITTG4TIFFistheformatusedbyfaxmachines.
256colors(8bit)
Smallfilesize
GIF
Thisisacompact,weborientedformat.Itissuited
forlowercolorfidelityapplicationswithelectronic
formats.
Photographs
Electronicoutput
Transparency
PNG
ThisisacompactRGBformatthatsupports
transparency.
Itisideallysuitedforelectronicoutputs,butwillnot
maintaintransparencyinPostScript,andislimited
toRGBcolor.
HighQualityColor
Photographs(RGB,
CMYK)
JPG
JPGislossy,meaningthatitsfilesizeisreducedby
removingpartsoftheimage.
JPGisverycompactandagreatformatfor
photographs.
HighQualityColor
Lineart,photographs,
clippingpaths,etc.
Allcolormodels
EPS
ThisformatisonlysupportedbyPostScriptand
someAFPdevices.
Thisistheonlyformatsuitableforimages
applicationsthatrequireclippingpaths.
WhenmakingPDFaPNGversionoftheEPSfileis
created.ThisPNGfilewillsupportclippingpathsif
theyarecontainedintheEPSfile.
Alphachannelsarenotsupportedfortransparency.
CMYKorothercolor
models
JPEGorEPS
InEPS,anycolormodelcanbeused,provideditis
supportedbytheoutputdevice.
RGB
JPEG,EPS,or
PNG
Cropping
All
Croppingissupported
Rotation
All
Imagerotationissupported.
Scaling
All
Scalingissupported
31
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Images
Requirement
Suggested
Comments
Transparency
EPS with
clippingpath
Thisistheonlyformatthatwillworkfor
transparencyinPostScript.
WhenEPSfileswithclippingpathsareusedfor
PostScript,anRGBAPNGfileiscreatedforusein
PDF.TheRGBA(Aisforalphaandindicatesalpha
channelsupport)allowsfortransparencyinthePDF
streamforEPSimages.
Allothermethodsofdefiningtransparencyarenot
supportedinPostScript.
Translucency
All
Translucencyisnotsupported.
Opacity
All
Opacityisnotsupported.
UseG4TIFFforMonochromeImages
Forsinglebitimages,G4TIFFisthemostpopularoption. Itoffersexcellentcompressionand
universalcompatibility.Importantly,mostoutputdeviceshavespecifichardwareaccelerationto
supportthisformat,increasingperformanceattheprinterwhereitreallycounts.ThePCLEmitter
onlyacceptsG4,LZWanduncompressedmonochromeTIFFfiles.
PDFImages
PDFsupportinxPressionoutputcanbeclassifiedintwocategories:PDFimages(lessthanapage)
andfull-ormulti-pagePDFs.PDFimagesaresupportedforuseinPDF,PostScript,andPPMLoutput.
ThefollowingtabledetailshoweachtypeofPDFcanbeincludedinadocumentforeachxPression
designtool.
DesignTool
PDFImages
Multi-pagePDFs
xDesign
UniversalContentImage
ExternalImage
ExternalContent
UniversalContent
xPressoforAdobe
InDesign
InDesignPlaceFunction
FromanECMRepository
ImageVariable
UniversalContentImageItem
PlacePDFFunction
UniversalContentItem
xPressoforWord
WordInsertFunction
FromanECMRepository
ImageVariable
UniversalContentImageItem
UniversalContentItem
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Images
Note:(1)InxPresso,ifyouinsertamulti-pagePDFfileusinganimagevariableorthroughonline
mode,onlythefirstpageofthePDFwillbeinsertedinthedocumentasanimage.(2)Ifyouincludea
PDFimageinadocumentthatispublishedtoanoutputformatthatdoesn’tsupportPDF,asupported
imageformatthatwascreatedduringanimageconversionwillbeused.Formoreinformation,see
PickingtheRightFormatforthePDL,page36.
Whenyouinsertamulti-pagePDFthroughuniversalcontent,youcandenotewhichpagesofthe
PDFaretobeinsertedintothedocument.UniversalcontentalsoenablesyoutodefineTOCoptions,
formattingoptions,andinclusionconditions.
JPEGImages
PleasereviewthefollowingtopicsaboutJPEGsupport:
• JPEGsinAFPandPostScriptOutput,page33
• InlineJPEGsinAFPOutput,page33
• JPEGRenderedinCMYK,page34
JPEGsinAFPandPostScriptOutput
IftheJPEG(.jpg,.jpeg)imagehasanirregularformat,thexPublishpublishingenginewillnotbe
abletouseittoproducePostScriptorAFPoutput.AJPEGimageis“irregular”ifitcontainsone
ofthefollowing:
• MorethanoneSOI(StartofImage:FFD8)tag.Thistagshouldappearonlyonceatthebeginning
ofthefile.
• MorethanoneSOS(StartofScan:FFDA)tag.Thistagindicatesthebeginningoftheimagescan.
YoucanuseautilitysuchasIrfanView(h
t
t
p
:
/
/
w
w
w
.
i
r
f
a
n
v
i
e
w
.
c
o
m
/
)tore-saveirregularJPEG
images,andthenusethenewlysavedimagesinyourdocument.
InlineJPEGsinAFPOutput
xPressionusesAFPFunctionSet11toembedJPEGimagesinline.Notethefollowinglimitations
whenyouinsertinlineJPEGimagesforAFPoutput:
• TheJPEGimagesmustbe24–bitRGB.
• FunctionSet11isnotbesupportedbyallIBMInfoPrintsystemsandprinters.Pleasecontactyour
vendortoensurethatFunctionSet11issupported.
• xPressionuses"ScaletoFit"toscaleanimagetofittheframesize,butsomeInfoPrintsystemsand
printersmaynotsupport"ScaletoFit".Inthatcase,youhavetomanuallyresizetheimageto
thesamesizeastheframe.
33
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Images
JPEGRenderedinCMYK
InternetExplorer8doesnotsupportJPEGimagesrenderedinCMYKmode. Imagesmustbe
renderedinRGBmodeifyouareusingInternetExplorer8withxReponse,xRevise,orthexDesign
OnlineEditor.
TIFFImages
ThexPressionPublishpublishingenginecurrentlysupportsfourtypesofTIFFimages:
• Bi-levelimages(monochromeimages)
• Greyscaleimages
• RGBfullcolorimages
• Separationimages(CMYKonly)
ThefollowingtypesofTIFFimagesarenotcurrentlysupported:
• RGBpaletteimages
• YCrCbimages
• CIELabimages
• JPEGembeddedimages
Note:Ifyouareusingamultiple-pageTIFFimageasuniversalcontentinyourdocument,thepage
sizetheTIFFimageisalwaysLetterintheoutputs.
ThefollowingtabledetailsxPressionTIFFimagesupport.
ImageTypes
Features
Bi-level
Grey
scale
RGB
CMYK
Nocompression
Yes
Yes
Yes
Yes
CCITT1D(ModifiedHuffman)
Yes
N/A
N/A
N/A
1D
Yes
N/A
N/A
N/A
2D
Yes
N/A
N/A
N/A
FillBitsBefore
EOL
Yes
N/A
N/A
N/A
CCITTG3
Uncompressed
Mode
No
N/A
N/A
N/A
Normal
Yes
N/A
N/A
N/A
CCITTG4
Uncompressed
Mode
No
N/A
N/A
N/A
PackBits
Yes
Yes
Yes
Yes
Compression
Method
LZW
Yes
Yes
Yes
Yes
34
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Images
ImageTypes
Features
Bi-level Grey
scale
RGB
CMYK
1
Yes
N/A
N/A
N/A
2
N/A
Yes
Yes
Yes
4
N/A
Yes
Yes
Yes
8
N/A
Yes
Yes
Yes
BitsPerSample
16
N/A
Yes
Yes
Yes
Normal
Yes
N/A
N/A
N/A
FillOrder
Reversed
Yes
N/A
N/A
N/A
Blackisone
Yes
Yes
N/A
N/A
ColorPresentation
Whiteisone
Yes
Yes
N/A
N/A
Planar(forexample,RRRGGGBBB)
N/A
N/A
Yes
Yes
Planarorinterlaced
Interlaced(forexample,
RGBRGBRGB)
N/A
N/A
Yes
Yes
SingleStrip
Yes
Yes
Yes
Yes
Stripes
MultipleStrips
Yes
Yes
Yes
Yes
ImageDataStorage
Tiled
No
No
No
No
ExtraSamples(Transparency)
No
No
No
No
EPSImages
BeawareofthefollowingissueswithEPSimages:
• IfanEPSimagecannotbeopenedinGSVIEW,itwillnotbeconvertedsuccessfullybythe
xPressionsystem.
• IfyouuseanimagevariabletopointtoanEPSimage,theimagewilldisappearwhenpreviewing
itasPDFinanxPressionclientapplication.
ICCColorProfileSupport
EmbeddedICCcolorprofilesinEPS,JPEGandPDFfilescanbepassedthroughxPressiontoprinter
driversorRIPprocessors.xPressioncan’tpassICCcolorprofilesinTIFFimages.Forthesupported
imagetypes,xPressioncanpasstheprofile,buttheprofilecan’tbeusedbyxPressiontomatchcolor.
xPressionhasnoknowledgeofthetypeofprinterorRIPprocessorthatwillbeused,andtherefore,
cannotresolvecolormatching.
PassingICCprofilesissupportedinEPSfileswhenoutputtoPostScript;orwhenconvertedtoPDF
orJPEGbyxPressoforAdobeInDesign,andthenoutputtoPDF.Youmustensurethat“pdf”and
“jpeg”appearatthebeginningoftheimagelistforPDFoutputintheconfigurationfile.
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Images
PassingICCprofilesissupportedinJPEGfileswhenoutputtoPostScriptandPDF,andinPDFfiles
whenoutputtoPDF.
AnykindofconversionorprocessingontheimagebythexPressionServerwillbreaktheICCcolor
profile,especiallytheResampleImagetoOutputResolutionfunction.
PickingtheRightFormatforthePDL
ItistruethatxPressionwilldoimageconversion.However,ifyoureallywanttooptimizeimage
usage,thenyoushouldstartwiththeimageformatthatisbestsuitedforyouroutput.Inthissection
wewillshowyouhowxPressiondecideswhichimageformattouseforyouroutputPDL,wewill
showyouhowtocustomizethisformatselection,andgiveyousomerecommendationsonwhich
imagetypetouseforyouroutputPDLs.
Thefollowingtabledetailswhichformateachunsupportedimageisconvertedtoforeachoutput
format. Anentryof“N/A”meanstheimageformatissupportedfortheoutputformat(sono
conversionisnecessary);anentryof“None”meanstheimageisnotsupported,butnoimage
conversionoccurs.
OriginalImage
AFP
DOCX
HTML
PCL
PDF/PPML
PostScript
BMP
JPEG
N/A
N/A
None
JPEG
JPEG
EPS
JPEG
JPEG,
PNG
JPEG,
PNG
None
PDF,JPEG,
PNG
N/A
GIF
JPEG
N/A
N/A
None
N/A
JPEG
JPEG(JFIF)
N/A
N/A
N/A
None
N/A
N/A
PDF
JPEG
JPEG
JPEG
None
N/A
JPEG
PNG
JPEG,
Group4
N/A
N/A
None
N/A
JPEG
TIFF(Group4)
N/A
JPEG
JPEG
N/A
N/A
N/A
TIFF
(Monochrome)
Group4
JPEG
JPEG
Group4
N/A
N/A
TIFF(Grayscale)
None
JPEG
JPEG
None
N/A
N/A
TIFF(Color)
None
JPEG
JPEG
None
N/A
N/A
HowxPressionDecidesWhichFormattoUse
WhenyouplaceanyimageintothexPressionRepository,xPressionautomaticallygeneratesanimage
formatcompatiblewithWeboutputtosupportpreviewingtheimagefromxAdmin.Forpublishing
ontheServerxPressionselectsanimageformatthatisbestsuitedfortheoutputtype.
TheimagetypethatisusedduringpublishingiscontrolledbyasettingintheDCPI.properties
configurationfile,locatedinthex
P
r
e
s
s
i
o
n
H
o
m
e
directoryonthexPressionServer. Eachoutput
36
Images
formathasaparameterinthefilethatcontainsalistofsupportedimageformats.Theorderofthe
imageformatsdeterminestheorderxPressionwillselectanimageformattopublish.
ThefollowingtableshowsxPression’sdefaultimageformatselectionforeachoutputtype.
PDL
DefaultImageSelection
AFP
PDF,JPG,JPEG,GIF
DOCX
PNG,JPG,GIF,BMP
EmailandHTML PNG,JPEG,JPG,GIF,BMP
PCL
TIF,TIFF
PDF
TIF,TIFF,PNG,PDF,JPG,JPEG,GIF,BMP
PostScript
PDF,EPS,JPG,JPEG,TIFF
TIFF
TIF,TIFF,PDF,PNG,JPG,JPEG,GIF,BMP
ImageTypeLimitations
SomeimagetypesthataresupportedbyxPressionarenotsupportedbyalloutputtypes. The
followinglimitationsapply:
• PDFsupportsallimagetypessupportedbyxPression
• PostScriptsupportsallimageformatssupportedbyxPressionexceptPNG.
• PCLsupportsGroup4only.
HowxPressionDeterminestheImageDPI
Forrasterimages(TIFF,GIF,BMP,JPG)xPressiondeterminestheDPIresolutionofauto-generated
imagesbyattemptingtousetheimageresolutionvalueembeddedintheimage.Ifthevalueisnot
embeddedintheimage,xPressionusesthedefaultresolutionof72DPI.
ForPDFandPostScriptimages,xPressionconvertstheseimagestorasterimages,assigningDPI
valuesasfollows:
• 300DPIforPrintimages
• 96DPIforWebimages
HowtoCustomizetheImageFormatSelection
YoucancustomizehowxPressionselectsimageformatsforyourPDLintwoways. First,youcan
customizethedefaultimageformatselectionforeachPDLbyeditingtheconfigurationfileonyour
server. ThischangeaffectstheentirexPressionsystem.Secondly,youcancustomizetheimage
formatselectionforindividualoutputstreams. Theseoutputstreamsettingsoverridethedefault
preferencessetintheconfigurationfile.
37
Images
CustomizingImageFormatSelection
YoucancustomizethedefaultimageformatselectionmethodbyeditingtheDCPI.propertiesfile
foryourserver. TheDCPI.propertiesfileislocatedinthex
P
r
e
s
s
i
o
n
H
o
m
e
directory(bydefault,
C:\xPression).ThechangesmadetothisfileaffecttheentirexPressionsystem,butwillbeoverwritten
byanypreferencesyousetintheindividualoutputstream.
TheDCPI.propertiesfilecontainssevenpropertiesthatenableyoutospecifytheimageformat
selectionpreference:
• ImagePreferenceForPDF
• ImagePreferenceForPS
• ImagePreferenceForAFP
• ImagePreferenceForTIFF
• ImagePreferenceForHTML
• ImagePreferenceForDOCX
• ImagePreferenceForPCL
Toeditthefile:
1. Navigatetothex
P
r
e
s
s
i
o
n
H
o
m
e
directory.
2. LocateandopentheDCPI.propertiesfileinaneditor.
3. LocatethefollowingsectionintheDCPI.propertiesfile.
#
BarcodeResolution=72
#
# Image format preference for different t output t type. When a image
# is s selected d or r created d the format preference will be concerned.
#
#ImagePreferenceForPDF=tif;tiff;pdf;jpg;jpeg;png;gif;bmp
ImagePreferenceForPS=eps;jpg;jpeg;tif
ImagePreferenceForAFP=jpg;jpeg;gif;tif;tiff;group4
ImagePreferenceForHTML=png;jpg;jpeg;gif;bmp
ImagePreferenceForPDF=tif;tiff;pdf;png;jpg;jpeg;gif;bmp
ImagePreferenceForPCL=tif;tiff
4. LocatethepropertyforyouroutputPDL.Forexample,forPostScript:
ImagePreferenceForPS=eps;jpg.jpeg;tif
5. ThefirstimageformatlistedinthevalueofthepropertyisthefirstimagexPressionattemptsto
selectfortheoutputPDL.
6. ChangetheorderasneededandsavetheDCPI.propertiesfilewhencompleted.
CustomizingOutputStreamImageFormatSelection
YoucancustomizetheimageformatselectionmethodattheoutputstreamlevelinxAdmin.
38
Images
The Image Preference e button n enables you u to reorder
the image e format preference for r your output stream
.
Thepreferencesdefinedhereoverwritethedefaultimageformatselectionpreferencesdefinedinthe
DCPI.propertiesfile,andapplyonlytothedocumentsintheoutputstream.
Tosettheimagepreferencefortheoutputstream:
1. StartxAdminandclickxPublishOutputManagement.
2. InthexPublishOutputManagementmenu,clickStreamDefinitions.
3. LocatetheImagePreferencebuttonandcorrespondingtextbox.
4. ClickImagePreference.TheImagePreferencepop-upboxappears.
TheImagePreferencepop-upboxenablesyoutoselectandorderoutputformats
.
39
Images
5. TheAvailableImageslistcontainsallavailableimagetypes.TheImageslistdisplaysallimage
typesyouhaveselectedforthecurrentoutputstream.TomoveimagetypesfromtheAvailable
ImageslisttotheImageslist,selecttheimagetypeandclickAdd.
6. OnceyouhaveallofyourimagetypesintheImageslist,youcanordertheimagesbyselecting
themandclickingtheMoveUpandMoveDownbuttons. Imagesatthetopofthelistare
selectedfirst,imagesatthebottomofthelistareselectedlast.
7. Whenfinished,clickOpen.TheselectionsyoumadeappearintheImagePreferencetextbox.
8. ClickSave.
GeneralImageTypeRecommendationsforYourPDL
ThefollowingtableprovidesgeneralimagetyperecommendationsforyourPDL.
xPressoforWord xPressoforInDesign
xDesign
AFPBlackandWhiteHigh
Speed
G4TIFF
G4TIFFsasexternal
images
G4TIFF
PCL
G4TIFF
G4TIFFsasexternal
images
G4TIFF
AFPColor
JPEG
JPEG
JPEG
PostScript
EPS/JPEG
EPS/JPEG
EPS/JPEG
PostScript with
Transparency
EPS
EPS
EPS
PDF
JPEG
PDF,JPEGorPNGif
youneedtransparency
PDForJPEG
BarCodeImages
WhenxPressiongeneratesabarcodeindocumentoutput,thebarcodeisactuallyanimage.
Currentlythethird-partytoolusedtocreatethebarcodesonlysupportsRGBcolor,anddoesn’t
supportCMYK.Althoughthebarcodesmaylookblackandwhite,theyareactuallyRGBcolor,which
maycauseissueswithsomebarcodereaders.
YoucanforceblackandwhiteimagesforbarcodesbysettingtheTiffG4ImageasBarcodeparameter
inthexPressionServerDCPI.propertiesfileto“true”. Whenthisparameterissetto“true”(the
default),TiffG4willbeusedasthebarcodeimageformat.Ifthisparameterissetto“false”,the
ImagePreferenceForOutputFormatparameter(alsolocatedintheDCPI.propertiesfile)willbeusedto
determinethebarcodeimageformat.TheImagePreferenceForOutputFormatparametercontrolsall
theimagesinanoutputstream,theTiffG4ImagesasBarcodeparametercontrolsonlybarcodeimages.
Note:ThePNGimageformatisnotsupportedforPostScriptoutput,soitisimportanttoensurethat
PNGisnotlistedastheimagepreferenceintheImagePreferenceForPSparameter.
40
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