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Chapter8-FileFormatConversion
TheInputQuality
Ifyouarereadingincolordocumentsandgettingoutblackandwhite,thenyourbit-depth(color)
maybelowerthanthatofyourdesiredoutput.Tryincreasingbit-depth(color)oftheinput
documentusingCIMGLOW_
set_
document_
input
(int,
int,
int)
.
Ifyouroutputiscomingoutgrainy,thenchecktoseeifyourinputisgrainytoo.
Iftheinputdocumentlooksgood,thenincreasetheinputDPIusingCIMGLOW_
set_
document_
input
(int,
int,
int)
.
Iftheinputisgrainy,thenyoumayneedtodosomeimageenhancementtechniques.Contact
SnowboundSupportathttp://support.snowbound.com
forhelp.
ColorReduction-GoingfromaColorDocumenttoBlackandWhiteorGrayscale
RasterMaster.NETwillautomaticallyhandlecolorpromotionandreduction.Howeverthereis
noexcellentone-size-fits-allmethodforeitherofthese.Youcanadjustthequalitybyusing
differentcolorpromotionorcolorreductionmethodstofinetuneyourresults.Pleaseseethe
Chapter
30,
Color
Promotion
Functions
andChapter
31,
Color
Reduction
Functions
chapters
formoreinformation.
LossyCompression
Ifyouroutputformatisusingalossycompression,youmaylosedetails.Youmaywanttotrya
differentlosslessoutputformat.
ErrorDuringConversion
Insomerarecases,theremaybeanerrorduringconversion.Thetextforanyoftheerrorcodes
describedinthetablebelowcanbeobtainedbycallingToErrorMessage
().
Pleaseprovidethe
inputfileandasampleofthebadoutputtoSnowboundSupportat
http://support.snowbound.com
.
ConversionTakesTooLongorOutputIsTooLarge
Ifyouhaveselectedhighqualityoutputbyselectingahighresolution(DPI)orahighbit-depth
(color),therewillbealotmoredatathanforalowerqualityimage.Thedatatakeslongerto
processandtakesmorespace.PleaseseeDetermining
Memory
Requirements
forinformation
ondeterminingyourmemoryrequirements.IfyoureducetheDPIorthebitsperpixelinyour
input.usingCIMGLOW_
set_
document_
input
(int,
int,
int)
and/orintheoutputusingcolor
reduction,youshouldseebetterperformanceandsmallerfiles.
61
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Chapter9-ClassSnow.SnowbndMethods
Chapter 9 - Class Snow.Snowbnd Methods
ThischapterdescribestheavailablemethodsfortheSnow.Snowbndclass.
Snowbnd()
ThisisanalternateconstructorthatcreatesanewSnowbndobjectbycopyingthecontentsof
anexistingSnowbndobject.
YoucanfindthesamplesforusingthisfunctioninthefollowingdirectoryC:\Program
Files\Snowbound Software\RasterMaster® .NET Evaluation\Net\Samples.
Thisfunctionisusedinthefollowingsamples:
l
Alpha
l
Animate
l
Annaction
l
Annotation
l
ASP
Conversion
l
ASP
Image
View
l
ASP
Memory
Copy
l
ASP
Multiple
Pages
l
Batch_
XPS_
Convert
l
Contrast
l
Conversion
l
Convert_
Doc
l
DDB
Effect
l
DocClean
l
Encryption
l
FileMem
62
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Chapter9-ClassSnow.SnowbndMethods
l
Image
Processing
l
Memory
Copy
l
Merge
Image
l
Page
l
Panning
l
Print
l
Scan
l
Split
to
Multiple
Pages
l
Text
Search
l
Thumbnail
l
Tiff
Tag
l
Web
Image
Viewer
Component
l
WPFAnnotation_
CSHARP
l
WPFConversion_
CSHARP
l
WPFScanning_
CSHARP
l
VectorConvertMem_
CSHARP
l
XPSMem_
CSHARP
Syntax
Snowbnd(void);
Snowbnd(int, int, int)
ThisisanimageconstructorfortheSnowbndobject.Thisallowsthecreationofablankimage
withallocatedmemory.
Syntax
Snowbnd(int width, int height, int bitsperpixel);
63
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Chapter9-ClassSnow.SnowbndMethods
Remark
Table9.1:Snowbnd(int width, int height, int bitsperpixel)Method
Variables
Variable
Description
width
Widthofblankbitmaptocreate.
height
Heightofbitmaptocreate.
bitsperpixel
Pixeldepthofbitmaptocreate.Canbesetto1,8,or24.
64
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Chapter10-SDKClassSpecificMethods
Chapter 10 - SDK Class Specific Methods
ThischapterdescribestheSDKclassspecificfunctionsforRasterMaster.NET.Thechapter
containsthefollowingtopics:
isValidImage()
Thisfunctioncheckstoseeiftheimageisdecompressedintotheobject.Itchecksthatthe
imagedatafortheobjectispresentorvalid.
Syntax
virtual bool isValidImage(void);
clearImage()
Thisfunctiontakeswhatisintheobject,removesimagedata,andresetstheclass.
YoucanfindthesamplesforusingthisfunctioninthefollowingdirectoryC:\Program
Files\Snowbound Software\RasterMaster® .NET Evaluation\Net\Samples.
Thisfunctionisusedinthefollowingsamples:
l
Animate
l
DDB
Effect
l
Encryption
l
FileMem
l
Image
Processing
l
Memory
Copy
l
Text
Search
l
Tiff
Tag
Syntax
virtual int clearImage(void);
65
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Chapter10-SDKClassSpecificMethods
ToErrorMessage()
Thismethodchecksforerrorsandreturnstheappropriateerrormessageforthefounderror.
Syntax
String SNBDAPI ToErrorMessage(status);
Remark
Table10.1:ToErrorMessageVariable
Variable
Description
status
Theerrorcode.
Returns
Returnshetextoftheerrormessage.AnyvaluelessthanzeroisaSnowbounderrorcode.See
Appendix
H,
Snowbound
Error
Codes
foralistoferrorcodes.
66
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VB.NET PowerPoint: VB Code to Draw and Create Annotation on PPT
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Chapter11-SnowPanelClassSpecificMethods
Chapter 11 - SnowPanel Class Specific
Methods
ThischapterdescribestheSnowPanelclassspecificmethods.
Properties
ThissectionliststhepropertiesusedintheSnowPanelclassspecificmethods:
Table11.1:SnowPanelClassSpecificMethodProperties
Property
Description
Zoom
Getsandsetsuserdefinedzoomvalue
Type
ASPECT_ZOOMtypevalues.Returnsthezoomvalueas
anASPECT_ZOOM.
DoubleBuffered
Setsthedoublebufferdisplayonoroff
CustomPaint()
ThisfunctionisthemainpaintmethodfortheSnowboundimagetothescreen.Thisfunctionis
onlyusedfortheSnowPanelclass.TheusercanoverrideCustomPainttoprovidehisown
CustomPaintmethod.
Syntax
public virtual void CustomPaint(Graphics *g);
Remark
Table11.2:CustomPaintVariable
Variable
Description
g
Graphicsobject
Returns
Returnsthestatusofthegraphicsobject.AnyvaluelessthanzeroisaSnowbounderrorcode.
SeeAppendix
H,
Snowbound
Error
Codes
foralistoferrorcodes.
67
Chapter11-SnowPanelClassSpecificMethods
OnPaint()
ThisfunctioncallsCustomPainttodrawtheimageusingtheCustomPaintmethod.How
thismethodpaintsisbasedontheDoubleBufferproperty.
Syntax
protected virtual void OnPaint(PaintEventArgs *e);
Remark
Table11.3:OnPaintVariable
Variable
Description
PaintEventArgs
Standard.NETeventhandle
Returns
Returnsthestatusofthestandard.NETeventhandle.Anyvaluelessthanzeroisa
Snowbounderrorcode.SeeAppendix
H,
Snowbound
Error
Codes
foralistoferrorcodes.
OnPaintBackground()
ThisfunctionrepaintsthebackgroundcolorandimageoftheSnowPanelclassdependingonif
thebackgroundimageisavailable.HowthismethodpaintsisbasedontheDoubleBuffer
property.
Syntax
protected virtual void OnPaintBackground(PaintEventArgs *pevent);
Remark
Table11.4:OnPaintBackgroundVariable
Variable
Description
PaintEventArgs
Standard.NETeventhandle
Returns
Returnsthestatusofthestandard.NETeventhandle.Anyvaluelessthanzeroisa
Snowbounderrorcode.SeeAppendix
H,
Snowbound
Error
Codes
foralistoferrorcodes.
OnSizeChanged()
ThisfunctionisusedwhentheSnowPanelclassisresizedtopreservethedisplay.
68
Chapter11-SnowPanelClassSpecificMethods
Syntax
protected virtual void OnSizeChanged(EventArgs *e);
Remark
Table11.5:OnSizeChangedVariable
Variable
Description
EventArgs
Standard.NETeventhandle
Returns
Returnsthestatusofthestandard.NETeventhandle.Anyvaluelessthanzeroisa
Snowbounderrorcode.SeeAppendix
H,
Snowbound
Error
Codes
foralistoferrorcodes.
69
Chapter12-ScanningFunctions
Chapter 12 - Scanning Functions
Thischapterdescribesthescanningfunctionsandparameters.
ScanningConstants
Shownbelowisthestructureforsettingscanningparameters.
Syntax
Example12.1:public__gcclassCSCAN_CAPS
{
public:
int bitspix; /* bits per pixel */
double left; /* window x start pos in inches */
double top; /* window y start pos in inches */
double right; /* window x size in inches */
double bottom; /* window y size in inches */
int hres; /* x resolution in pixels */
int vres; /* y resolution in pixels */
Variables
Table12.1:CSCAN_CAPSVariables
Variable
Description
intbitspix
Bitsperpixel
doubleleft
Windowxstartposininches
doubletop
Windowystartposininches
doubleright
Windowxsizeininches
doublebottom
Windowysizeininches
inthres
Xresolutioninpixels
intvres
Yresolutioninpixels
CIMG_scan_acquire()
ThisTWAINscanningroutinescansanimageonthecurrentlyinstalledscannerorinput
device.
YoucanfindthesamplesforusingthisfunctioninthefollowingdirectoryC:\Program
Files\Snowbound Software\RasterMaster® .NET Evaluation\Net\Samples.
ThisfunctionisusedintheScan
sample.
70
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