ImageEffects Property (TwainSession)

C#
Visual Basic
Objective-C
Java
C++

public TwainImageEffects ImageEffects {get; set;}

'Declaration
 
Public Property ImageEffects As TwainImageEffects

'Usage
 
Dim instance As TwainSession
Dim value As TwainImageEffects
 
instance.ImageEffects = value
 
value = instance.ImageEffects

public:
property TwainImageEffects ImageEffects {
   TwainImageEffects get();
   void set (    TwainImageEffects value);
}

Property Value

Image Effects as brightness, highlight and contrast values to use when transferring images from the current TWAIN source

The ImageEffects property will get and set the brightness, highlight and contrast values for the current TWAIN source.

C#
Visual Basic
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

Imports Leadtools
Imports Leadtools.Twain

Public Sub ImageEffectsPropertyExample(ByVal parent As IWin32Window)
   Dim session As TwainSession = New TwainSession()
   session.Startup(parent, "manufacturer", "productFamily", "version", "application", TwainStartupFlags.None)

   Dim imgEffects As TwainImageEffects = session.ImageEffects
   imgEffects.Flags = TwainImageEffectsFlags.NegotiateBrightness Or TwainImageEffectsFlags.NegotiateContrast Or TwainImageEffectsFlags.NegotiateHighlight
   Dim contrast As Single = imgEffects.Contrast
   Dim highlight As Single = imgEffects.Highlight
   Dim msg As String = String.Format("Image Contrst = {0}" & Constants.vbLf & "Image Highlight = {1}", contrast, highlight)
   MessageBox.Show(msg)

   imgEffects.Brightness = 100
   session.ImageEffects = imgEffects

   Dim pageOpts As TwainAcquirePageOptions = session.AcquirePageOptions
   pageOpts.PaperSize = TwainPaperSize.A4
   pageOpts.PaperOrientation = TwainPaperOrientation.Landscape
   session.AcquirePageOptions = pageOpts

   session.Shutdown()
End Sub

using Leadtools;
using Leadtools.Twain;

public void ImageEffectsPropertyExample(IWin32Window parent)
{
   TwainSession session = new TwainSession();
   session.Startup(parent, "manufacturer", "productFamily", "version", "application", TwainStartupFlags.None);

   TwainImageEffects imgEffects = session.ImageEffects;
   imgEffects.Flags = TwainImageEffectsFlags.NegotiateBrightness | TwainImageEffectsFlags.NegotiateContrast | TwainImageEffectsFlags.NegotiateHighlight;
   float contrast = imgEffects.Contrast;
   float highlight = imgEffects.Highlight;
   string msg = String.Format("Image Contrst = {0}\nImage Highlight = {1}", contrast, highlight);
   MessageBox.Show(msg);

   imgEffects.Brightness = 100;
   session.ImageEffects = imgEffects;

   TwainAcquirePageOptions pageOpts = session.AcquirePageOptions;
   pageOpts.PaperSize = TwainPaperSize.A4;
   pageOpts.PaperOrientation = TwainPaperOrientation.Landscape;
   session.AcquirePageOptions = pageOpts;

   session.Shutdown();
}

Target Platforms

Reference

TwainSession Class
TwainSession Members
Startup Method
Shutdown Method
Acquire Method
MaximumTransferCount Property
DuplexScanningMode Property
EnableDuplexScanning Property
AcquirePageOptions Property
ImageBitsPerPixel Property
ImageUnit Property
ImageFrame Property
IsTransferModeAvailable Method
TransferOptions Property
ShowProgressIndicator Method