IacDocument.RasterizePageRange Method

The RasterizePageRange method converts page contents into a color or grey scale image. When archiving documents or performing OCR, it is sometimes preferable for all pages to be stored as images rather than complex text and graphic operations.

Syntax

Visual Basic .NET:

Public Function RasterizePageRange(ByVal StartPage As Integer, ByVal EndPage As Integer, ByVal Resolution As Integer, ByVal colorOption As Amyuni.PDFCreator.IacRasterizeColorOption, ByVal compression As Amyuni.PDFCreator.IacImageCompressionConstants) As Boolean

C#:

public bool RasterizePageRange(int StartPage, int EndPage, int Resolution, Amyuni.PDFCreator.IacRasterizeColorOption colorOption, Amyuni.PDFCreator.IacImageCompressionConstants compression)

Parameters

StartPage, EndPage

Start and end page numbers to Rasterize. Page numbers start with page 1.

Resolution

Resolution in dots per inch (DPI) at which the documents are to be rasterized. A DPI of 150 is recommended in most situations. Higher resolutions will produce very large PDF files.

ColorOption

• acColorOptionBW = 1 Black and White images

• acColorOptionGray = 2 256 Grey level images

• acColorOptionRGB = 3 RGB color images

Compression

• acCompression256Colors = 1 256 Color level images

• acCompressionJPegLow = 2 Low quality JPeg Compression

• acCompressionJPegMedium = 7 Medium quality JPeg Compression

• acCompressionJPegHigh = 9 High quality JPeg Compression

• acCompressionCCITTFax = 10 CCITT Level 6 Black and White Compression

• acCompressionPNG = 11 PNG (Flate) Compression

• acCompressionJPG2000 = 12 JPeg 2000 Compression

• acCompressionJBIG2 = 13 JBIG2 Compression

Remarks

Member of Amyuni.PDFCreator.IacDocument.

Example

Dim file1 As New System.IO.FileStream("Test.pdf", System.IO.FileMode.Open)

With PdfCreator1

    .SetLicenseKey("Evaluation", "07EF0C71...28E79EE2F79")

    .Document.Open(file1, "")

    'Rasterize all the document and save as JBIG2

    .Document.RasterizePageRange(1, PdfCreator1.Document.PageCount, 120, Amyuni.PDFCreator.IacRasterizeColorOption.acColorOptionGray, Amyuni.PDFCreator.IacImageCompressionConstants.acCompressionJBIG2)

End With

pdfCreator1.SetLicenseKey("Amyuni Tech.", "07EFC1000...FB9CFD");

System.IO.FileStream file1 = new System.IO.FileStream("Test1.pdf", FileMode.Open);

//pdf Creator1 is the control set on the form

pdfCreator1.Document.Open(file1, "");

//Rasterize all the document and save as JBIG2

pdfCreator1.Document.RasterizePageRange(1, pdfCreator1.Document.PageCount, 120, IacRasterizeColorOption.acColorOptionGray, IacImageCompressionConstants.acCompressionJBIG2);