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GetJpegCompression Method

Summary
Gets the current or default JPEG compression settings for the TWAIN session.

Syntax
C#
C++/CLI
Python
public TwainJpegCompression GetJpegCompression( 
   bool defaultValues 
) 
public: 
TwainJpegCompression GetJpegCompression(  
   bool defaultValues 
)  
def GetJpegCompression(self,defaultValues): 

Parameters

defaultValues
Flag that indicates whether to get the current or the default compression settings.

Return Value

A TwainJpegCompression object that contains the specified TWAIN JPEG compression options.

Remarks

This method will get the current or default TWAIN JPEG compression settings, depending on the flag passed to the flag parameter. For more information, refer to Using JPEG Compression For A TWAIN Source.

Example
C#
using Leadtools; 
using Leadtools.Twain; 
 
 
public void GetJpegCompressionExample(IntPtr parent) 
{ 
   TwainSession session = new TwainSession(); 
   session.Startup(parent, "manufacturer", "productFamily", "version", "application", TwainStartupFlags.None); 
 
   string jpegdata; 
   try 
   { 
      TwainJpegCompression twainJpeg = session.GetJpegCompression(false); 
      int[] quantMap = twainJpeg.GetQuantizationMap(); 
      int[] haffmanMap = twainJpeg.GetHuffmanMap(); 
      TwainMemoryData[] quantTable = twainJpeg.GetQuantizationTable(); 
      TwainMemoryData[] haffmanDC = twainJpeg.GetHuffmanDC(); 
      TwainMemoryData[] haffmanAC = twainJpeg.GetHuffmanAC(); 
 
      jpegdata = String.Format(@"Color Space = {0}\nQuantMap = {1}\nGetHuffmanMap = {2}\nGetQuantTable Flags = {3}\nGetQuantTable Length = {4}\nGetQuantTable Data = {5}\nGetHuffmanDC Flags = {6}\nGetHuffmanDC Data 
            = {7}\nGetHuffmanAC Flags = {8}\nGetHuffmanAC Data = {9}\n", 
                               twainJpeg.ColorScheme, 
                               quantMap[0], 
                               haffmanMap[0], 
                               quantTable[0].Flags, 
                               quantTable[0].Length, 
                               quantTable[0].Data, 
                               haffmanDC[0].Flags, 
                               haffmanDC[0].Data, 
                               haffmanAC[0].Flags, 
                               haffmanAC[0].Data); 
 
      MessageBox.Show(jpegdata); 
   } 
   catch (Exception ex) 
   { 
      MessageBox.Show(ex.Message); 
   } 
 
   session.Shutdown(); 
} 
Requirements

Target Platforms

Help Version 23.0.2024.2.29
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© 1991-2024 LEAD Technologies, Inc. All Rights Reserved.

Leadtools.Twain Assembly
Products | Support | Contact Us | Intellectual Property Notices
© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.