SetJpegCompression Method

Summary
Sets the JPEG compression options for the current TWAIN session. This method lets the user set JPEG compression options for the current TWAIN session or reset the default JPEG compression options for the current TWAIN session, depending on the flag passed to the flag parameter.
Syntax
C#
C++
public void SetJpegCompression( 
   TwainJpegCompression compression, 
   bool resetValues 
) 
vb[VB Syntax] 
Public Sub SetJpegCompression( _ 
   ByVal _compression_ As TwainJpegCompression, _ 
   ByVal _resetValues_ As Boolean _ 
) 
public: 
void SetJpegCompression(  
   TwainJpegCompression compression, 
   bool resetValues 
)  

Parameters

compression
JPEG Compression data to be set

resetValues
Indicates the JPEG compression values to set

Remarks

Depending upon the flag used, this method will either set JPEG compression options for the current TWAIN session, or restore the default JPEG compression options for the current TWAIN session. For more information, refer to Using JPEG Compression For A TWAIN Source.

Example
C#
using Leadtools; 
using Leadtools.Twain; 
 
 
public void SetJpegCompressionExample(IntPtr parent) 
{ 
   TwainSession session = new TwainSession(); 
   session.Startup(parent, "manufacturer", "productFamily", "version", "application", TwainStartupFlags.None); 
 
   try 
   { 
      TwainJpegCompression myJpeg = session.GetJpegCompression(false); 
      TwainMemoryData[] data = new TwainMemoryData[1]; 
 
      myJpeg.ColorScheme = TwainColorScheme.Gray; 
      myJpeg.SubSampling = 0x10001000; 
      myJpeg.ColorComponentCount = 1; 
      myJpeg.RestartFrequency = 0; 
 
      int[] quantMap = new int[1]; 
      quantMap[0] = 0; 
      myJpeg.SetQuantizationMap(quantMap); 
 
      int[] haffmanMap = new int[1]; 
      haffmanMap[0] = 0; 
      myJpeg.SetHuffmanMap(haffmanMap); 
      myJpeg.SetQuantizationTable(data); 
      myJpeg.SetHuffmanDC(data); 
      myJpeg.SetHuffmanAC(data); 
 
      session.SetJpegCompression(myJpeg, false); 
      MessageBox.Show("Set JPEG compression options is success"); 
   } 
   catch (Exception ex) 
   { 
      MessageBox.Show(ex.Message); 
   } 
 
   session.Shutdown(); 
} 
Requirements

Target Platforms

Help Version 22.0.2022.4.5
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Leadtools.Twain Assembly

Products | Support | Contact Us | Intellectual Property Notices
© 1991-2022 LEAD Technologies, Inc. All Rights Reserved.