Segments the specified image using Mixed Raster Content (MRC segmentation) and then compresses it and inserts it into the PDF file.
Syntax
Parameters
- image
- Image to be inserted into the PDF file.
- options
- The PdfCompressorOptions structure that contains the options to be used to write the image to the PDF file.
Example
This example inserts an image to pdf document and uses the MRC to make a proper segment for this image.
Visual Basic | Copy Code |
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Public Sub pdfCompressor_SegmentImage_MrcDocument(ByVal sender As Object, ByVal e As PdfCompressorSegmentImageEventArgs)
'This will prevent addition to any segment with type background
If e.Segment.Type = SegmentTypeFlags.Background Then
e.Cancel = True
Else
e.Cancel = False
End If
End Sub
Public Sub PdfCompressorExample_MrcDocument()
' Load an image
Dim codecs As RasterCodecs = New RasterCodecs()
codecs.ThrowExceptionsOnInvalidImages = True
Dim image As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "MRCSegmentation.mrc"))
Dim pdfCompressor As PdfCompressor = New PdfCompressor()
Dim compressionTypes As PdfCompressorCompressionTypes = New PdfCompressorCompressionTypes()
Dim pdfCompressorOptions As PdfCompressorOptions = New PdfCompressorOptions()
'Sets compression types needed for each segment
compressionTypes.Comp1Bit = PdfCompressor1BitCompression.Zip1Bit
compressionTypes.Comp2Bit = PdfCompressor2BitCompression.Lzw2Bit
compressionTypes.CompPicture = PdfCompressorPictureCompression.JpgPic
compressionTypes.QFactor = 2
'Flags for used compression types should be set
compressionTypes.Flags = EnabledCompressionsFlags.EnableOneBit Or EnabledCompressionsFlags.EnableTwoBit Or EnabledCompressionsFlags.EnablePicture
pdfCompressor.SetCompression(compressionTypes)
'Specify suitable profiles for input and output image
pdfCompressorOptions.ImageQuality = PdfCompressorImageQuality.ComputerGenerated
pdfCompressorOptions.OutputQuality = PdfCompressorOutputQuality.Excellent
pdfCompressorOptions.Flags = SegmentationOptionsFlags.FavorOneBit Or SegmentationOptionsFlags.WithBackground
AddHandler pdfCompressor.SegmentImage, AddressOf pdfCompressor_SegmentImage_MrcDocument
pdfCompressor.Insert(image, pdfCompressorOptions)
pdfCompressor.Write(Path.Combine(LEAD_VARS.ImagesDir, "Image.pdf"))
End Sub
Public NotInheritable Class LEAD_VARS
Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class |
C# | Copy Code |
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public void pdfCompressor_SegmentImage_MrcDocument(object sender, PdfCompressorSegmentImageEventArgs e)
{
//This will prevent addition to any segment with type background
if(e.Segment.Type == SegmentTypeFlags.Background)
e.Cancel = true;
else
e.Cancel = false;
}
public void PdfCompressorExample_MrcDocument()
{
// Load an image
RasterCodecs codecs = new RasterCodecs();
codecs.ThrowExceptionsOnInvalidImages = true;
RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir,"MRCSegmentation.mrc"));
PdfCompressor pdfCompressor = new PdfCompressor();
PdfCompressorCompressionTypes compressionTypes = new PdfCompressorCompressionTypes();
PdfCompressorOptions pdfCompressorOptions = new PdfCompressorOptions();
//Sets compression types needed for each segment
compressionTypes.Comp1Bit = PdfCompressor1BitCompression.Zip1Bit;
compressionTypes.Comp2Bit = PdfCompressor2BitCompression.Lzw2Bit;
compressionTypes.CompPicture = PdfCompressorPictureCompression.JpgPic;
compressionTypes.QFactor = 2;
//Flags for used compression types should be set
compressionTypes.Flags = EnabledCompressionsFlags.EnableOneBit |
EnabledCompressionsFlags.EnableTwoBit |
EnabledCompressionsFlags.EnablePicture;
pdfCompressor.SetCompression(compressionTypes);
//Specify suitable profiles for input and output image
pdfCompressorOptions.ImageQuality = PdfCompressorImageQuality.ComputerGenerated;
pdfCompressorOptions.OutputQuality = PdfCompressorOutputQuality.Excellent;
pdfCompressorOptions.Flags = SegmentationOptionsFlags.FavorOneBit |
SegmentationOptionsFlags.WithBackground;
pdfCompressor.SegmentImage += new EventHandler<PdfCompressorSegmentImageEventArgs>(pdfCompressor_SegmentImage_MrcDocument);
pdfCompressor.Insert(image, pdfCompressorOptions);
pdfCompressor.Write(Path.Combine(LEAD_VARS.ImagesDir,"Out_Image.pdf"));
}
static class LEAD_VARS
{
public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
} |
Remarks
Requirements
Target Platforms: Microsoft .NET Framework 2.0, Windows 2000, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7
See Also