WiaImageDataType Enumeration

Summary

The data types to be used for the image when performing data transfer from WIA source. For more information, refer to the WIA_IPA_DATATYPE property ID in the Microsoft Windows SDK Documentation.

Syntax

C++/CLI

Python

public enum WiaImageDataType

public enum class WiaImageDataType : public System.Enum, System.IComparable, System.IConvertible, System.IFormattable

class WiaImageDataType(Enum): 
   Threshold = 0 
   Dither = 1 
   Grayscale = 2 
   Color = 3 
   ColorThreshold = 4 
   ColorDither = 5 
   RawRgb = 6 
   RawBgr = 7 
   RawYuv = 8 
   RawYuvk = 9 
   RawCmy = 10 
   RawCmyk = 11

Members

Value	Member	Description
0	Threshold	(0x00000004)Threshold.
1	Dither	(0x00000005)Dither.
2	Grayscale	Grayscale.
3	Color	Color.
4	ColorThreshold	ColorThreshold.
5	ColorDither	ColorDither.
6	RawRgb	RawRgb.
7	RawBgr	RawBgr.
8	RawYuv	RawYuv.
9	RawYuvk	RawYuvk.
10	RawCmy	RawCmy.
11	RawCmyk	RawCmyk.

Example

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Wia; 
 
 
WiaSession wiaSession; 
       
public void GetRootItemExample(IntPtr parent) 
{ 
   if (!WiaSession.IsAvailable(WiaVersion.Version1)) 
   { 
      Console.WriteLine("WIA version 1.0 not installed."); 
      return; 
   } 
   wiaSession = new WiaSession(); 
   wiaSession.Startup(WiaVersion.Version1); 
 
   DialogResult res = wiaSession.SelectDeviceDlg(parent, WiaDeviceType.Default, WiaSelectSourceFlags.NoDefault); 
   if (res != DialogResult.OK) 
   { 
      Console.WriteLine("Error selecting WIA device."); 
      wiaSession.Shutdown(); 
      return; 
   } 
 
   object rootItem = wiaSession.GetRootItem(null); 
   if (rootItem != null) 
   { 
      wiaSession.EnumItemsEvent += new EventHandler<WiaEnumItemsEventArgs>(wiaSession_EnumItemsEvent); 
 
      wiaSession.EnumChildItems(rootItem); 
 
      wiaSession.EnumItemsEvent -= new EventHandler<WiaEnumItemsEventArgs>(wiaSession_EnumItemsEvent); 
   } 
 
   wiaSession.Shutdown(); 
} 
 
void wiaSession_EnumItemsEvent(object sender, WiaEnumItemsEventArgs e) 
{ 
   if (e.Item != null) 
   { 
      WiaDataTransferProperties dataTransfer = WiaDataTransferProperties.Empty; 
      WiaImageEffectsProperties imageEffects = WiaImageEffectsProperties.Empty; 
 
      WiaProperties properties = wiaSession.GetProperties(e.Item); 
 
      dataTransfer.ImageDataType = WiaImageDataType.Grayscale; 
      imageEffects.Brightness = 250; 
 
      properties.DataTransfer = dataTransfer; 
      properties.ImageEffects = imageEffects; 
      properties.ScanningMode = WiaScanningModeFlags.Feeder;   // set scanning source to Feeder 
      properties.MaximumNumberOfPages = 0;                     // scan all pages in feeder 
      properties.ImageType = WiaImageType.Grayscale; 
      properties.Orientation = WiaOrientation.Portrait; 
 
      WiaImageResolutionProperties imageResolution = properties.ImageResolution; 
      imageResolution.BitsPerPixel = 8; 
      imageResolution.HorizontalResolution = 600; 
      imageResolution.VerticalResolution = 600; 
      properties.ImageResolution = imageResolution; 
 
      wiaSession.SetPropertiesEvent += new EventHandler<WiaSetPropertiesEventArgs>(wiaSession_SetPropertiesEvent); 
 
      wiaSession.SetProperties(e.Item, properties); 
 
      wiaSession.SetPropertiesEvent -= new EventHandler<WiaSetPropertiesEventArgs>(wiaSession_SetPropertiesEvent); 
 
      wiaSession.FreeItem(e.Item); 
   } 
} 
 
void wiaSession_SetPropertiesEvent(object sender, WiaSetPropertiesEventArgs e) 
{ 
   if (e.Error <= 0) 
   { 
      Console.WriteLine("Failed to set the below property:\n\tProperty Id: {0}\n\tProperty Value: {1}\n\tError: {2}\n\n", e.PropertyId.ToString(), e.Value.ToString(), e.Error.ToString()); 
   } 
}