ChangeContrastCommand Constructor(Int32)

Visual Basic
C#
WinRT C#
WinRT JavaScript
C++

public ChangeContrastCommand( 
   int contrast
)

'Declaration
 
Public Function New( _
   ByVal contrast As Integer _
)

'Usage
 
Dim contrast As Integer
 
Dim instance As New ChangeContrastCommand(contrast)

public ChangeContrastCommand( 
   int contrast
)

function ChangeContrastCommand( 
   contrast 
)

public:
ChangeContrastCommand( 
   int contrast
)

Parameters

contrast: Amount of contrast change. Valid values are -1000 to +1000.

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

Public Sub ChangeContrastConstructorExample()
   Dim codecs As New RasterCodecs()
   codecs.ThrowExceptionsOnInvalidImages = True

   Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Master.jpg"))

   ' Prepare the command
   Dim command As ChangeContrastCommand = New ChangeContrastCommand(250)
   'Increase the contrast  by 25 percent  of the possible range.
   command.Run(leadImage)
   codecs.Save(leadImage, Path.Combine(LEAD_VARS.ImagesDir, "Result.jpg"), RasterImageFormat.Jpeg, 24)

End Sub

Public NotInheritable Class LEAD_VARS
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class

public void ChangeContrastConstructorExample()
   {
      // Load an image
      RasterCodecs codecs = new RasterCodecs();
      codecs.ThrowExceptionsOnInvalidImages = true;

      RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Master.jpg"));

      // Prepare the command
      ChangeContrastCommand command = new ChangeContrastCommand(250);

      // Increase the contrast  by 25 percent  of the possible range.
      command.Run(image);
      codecs.Save(image, Path.Combine(LEAD_VARS.ImagesDir, "Result.jpg"), RasterImageFormat.Jpeg, 24);

   }

static class LEAD_VARS
{
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}

[TestMethod]
public async Task ChangeContrastConstructorExample()
{
   // Load an image
   RasterCodecs codecs = new RasterCodecs();
   codecs.ThrowExceptionsOnInvalidImages = true;
   // Load the image
   string srcFileName = @"Assets\Image1.cmp";
   StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(srcFileName);
   RasterImage image = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile));

   // Prepare the command
   ChangeContrastCommand command = new ChangeContrastCommand(250);

   // Increase the contrast  by 25 percent  of the possible range.
   command.Run(image);

   string destFileName = @"result.jpg";
   StorageFile saveFile = await Tools.AppLocalFolder.CreateFileAsync(destFileName);
   await codecs.SaveAsync(image, LeadStreamFactory.Create(saveFile), RasterImageFormat.Jpeg, 0);
}

public void ChangeContrastConstructorExample(RasterImage image, Stream outStream)
{
   // Prepare the command
   ChangeContrastCommand command = new ChangeContrastCommand(250);
   // Increase the contrast  by 25 percent  of the possible range.
   command.Run(image);

   // Save result image
   RasterCodecs codecs = new RasterCodecs();
   codecs.Save(image, outStream, RasterImageFormat.Jpeg, 24);
   image.Dispose();
}

Public Sub ChangeContrastConstructorExample(ByVal image As RasterImage, ByVal outStream As Stream)
   ' Prepare the command
   Dim command As ChangeContrastCommand = New ChangeContrastCommand(250)
   ' Increase the contrast  by 25 percent  of the possible range.
   command.Run(image)

   ' Save result image
   Dim codecs As RasterCodecs = New RasterCodecs()
   codecs.Save(image, outStream, RasterImageFormat.Jpeg, 24)
   image.Dispose()
End Sub

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

ChangeContrastCommand Class
ChangeContrastCommand Members
Overload List