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ImageEffects Property (TwainSession)

Summary

Gets or sets the brightness, highlight and contrast values to use when transferring images from the current TWAIN source.

Syntax

C++

public Leadtools.Twain.TwainImageEffects ImageEffects {get; set;}

Public Property ImageEffects As Leadtools.Twain.TwainImageEffects

public: 
property Leadtools.Twain.TwainImageEffects ImageEffects { 
   Leadtools.Twain.TwainImageEffects get(); 
   void set (    Leadtools.Twain.TwainImageEffects ); 
}

Property Value

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

Remarks

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

Example

Imports Leadtools 
Imports Leadtools.Twain 
 
Public Sub ImageEffectsPropertyExample(ByVal parent As IntPtr) 
   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(IntPtr 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(); 
}