Public Shared Sub EncodeImagesUseMrc(images As Vintasoft.Imaging.ImageCollection, pdfFilename As String)
    ' create PDF MRC encoder
    Dim encoder As New Vintasoft.Imaging.Codecs.Encoders.PdfMrcEncoder()

    ' set MRC compression settings
    SetCompressionSettings(encoder.MrcCompressionSettings)

    ' save images to PDF use MRC compression
    images.SaveSync(pdfFilename, encoder)
End Sub

Private Shared Sub SetCompressionSettings(settings As Vintasoft.Imaging.Codecs.Encoders.PdfMrcCompressionSettings)
    ' background layer
    settings.CreateBackgroundLayer = True
    settings.BackgroundLayerCompression = Vintasoft.Imaging.Pdf.PdfCompression.Jpeg Or Vintasoft.Imaging.Pdf.PdfCompression.Zip
    settings.BackgroundLayerCompressionSettings.JpegQuality = 35

    ' images layer, images placed to background layer
    settings.ImageSegmentation = New Vintasoft.Imaging.ImageProcessing.Info.ImageSegmentationCommand()
    settings.CreateImagesLayer = False

    ' mask layer
    settings.HiQualityMask = True
    settings.MaskCompression = Vintasoft.Imaging.Pdf.PdfCompression.Jbig2
    settings.MaskCompressionSettings.Jbig2Settings.Lossy = True

    ' front layer
    settings.CreateFrontLayer = True
    settings.HiQualityFrontLayer = True
    settings.FrontLayerCompression = Vintasoft.Imaging.Pdf.PdfCompression.Jpeg Or Vintasoft.Imaging.Pdf.PdfCompression.Zip
    settings.FrontLayerCompressionSettings.JpegQuality = 25
End Sub

public static void EncodeImagesUseMrc(Vintasoft.Imaging.ImageCollection images, string pdfFilename)
{
    // create PDF MRC encoder
    Vintasoft.Imaging.Codecs.Encoders.PdfMrcEncoder encoder = 
        new Vintasoft.Imaging.Codecs.Encoders.PdfMrcEncoder();
    
    // set MRC compression settings
    SetCompressionSettings(encoder.MrcCompressionSettings);
    
    // save images to PDF use MRC compression
    images.SaveSync(pdfFilename, encoder);
}

private static void SetCompressionSettings(Vintasoft.Imaging.Codecs.Encoders.PdfMrcCompressionSettings settings)
{
    // background layer
    settings.CreateBackgroundLayer = true;
    settings.BackgroundLayerCompression = 
        Vintasoft.Imaging.Pdf.PdfCompression.Jpeg | Vintasoft.Imaging.Pdf.PdfCompression.Zip;
    settings.BackgroundLayerCompressionSettings.JpegQuality = 35;

    // images layer, images placed to background layer
    settings.ImageSegmentation = 
        new Vintasoft.Imaging.ImageProcessing.Info.ImageSegmentationCommand();
    settings.CreateImagesLayer = false;

    // mask layer
    settings.HiQualityMask = true;
    settings.MaskCompression = Vintasoft.Imaging.Pdf.PdfCompression.Jbig2;
    settings.MaskCompressionSettings.Jbig2Settings.Lossy = true;

    // front layer
    settings.CreateFrontLayer = true;
    settings.HiQualityFrontLayer = true;
    settings.FrontLayerCompression = 
        Vintasoft.Imaging.Pdf.PdfCompression.Jpeg | 
        Vintasoft.Imaging.Pdf.PdfCompression.Zip;
    settings.FrontLayerCompressionSettings.JpegQuality = 25;
}