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ImageType Property

Summary
Gets or sets the application's intended use of the image.

Syntax
C#
C++/CLI
Python
public WiaImageType ImageType { get; set; } 
public: 
property WiaImageType ImageType { 
   WiaImageType get(); 
   void set (    WiaImageType ); 
} 
ImageType # get and set (WiaProperties) 

Property Value

The application's intended use of the image. The device uses this value to change its settings. The settings change depending upon how the image will be used. Possible values are (according to Microsoft SDK documentation):

WiaImageType.None

Default value. No intent is specified.

WiaImageType.Color

The application intends to prepare the device for a color scan.

WiaImageType.Grayscale

The application intends to prepare the device for a grayscale scan.

WiaImageType.Text

The application intends to prepare the device for scanning text.

WiaImageType.Mask

Mask for all of the image-type flags.

WiaImageType.MinimizeSize

The application intends to prepare the device for scanning an image that result's in a small scan.

WiaImageType.MaximizeQuality

The application intends to prepare the device for scanning a high-quality image.

WiaImageType.SizeMask

This flag is a mask for all of the size/quality flags.

WiaImageType.BestPreview

The application intends to prepare the device for scanning a preview.

For more information about these image types, refer to the WIA_IPS_CUR_INTENT property ID in Microsoft Windows SDK Documentation.

Example
C#
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()); 
   } 
} 
Requirements

Target Platforms

Help Version 23.0.2024.2.29
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Leadtools.Wia Assembly

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© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.