LEADTOOLS Image Processing (Leadtools.ImageProcessing.Core assembly) Send comments on this topic. | Back to Introduction - All Topics | Help Version 17.0.3.29
AutoCropRectangleCommand Constructor(Int32)
See Also  Example
Leadtools.ImageProcessing.Core Namespace > AutoCropRectangleCommand Class > AutoCropRectangleCommand Constructor : AutoCropRectangleCommand Constructor(Int32)



threshold
Delta value for detecting blank space. Starting at each edge of the image and evaluating toward the center, any change in intensity that is less than or equal to this parameter is considered blank space. Valid values are 0 to 255.
Initializes a new AutoCropRectangleCommand class object with explicit parameters. Supported in Silverlight, Windows Phone 7

Syntax

Visual Basic (Declaration) 
Public Function New( _
   ByVal threshold As Integer _
)
Visual Basic (Usage)Copy Code
Dim threshold As Integer
 
Dim instance As New AutoCropRectangleCommand(threshold)
C# 
public AutoCropRectangleCommand( 
   int threshold
)
C++/CLI 
public:
AutoCropRectangleCommand( 
   int threshold
)

Parameters

threshold
Delta value for detecting blank space. Starting at each edge of the image and evaluating toward the center, any change in intensity that is less than or equal to this parameter is considered blank space. Valid values are 0 to 255.

Example

Run the Leadtools.ImageProcessing.Core.AutoCropRectangleCommand on an image to get the AutoCrop rectangle.

Visual BasicCopy Code
Public Sub AutoCropRectangleConstructorExample()
   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 threshold As Integer = 0
   Try
      Dim command As AutoCropRectangleCommand
      command = New AutoCropRectangleCommand(threshold)
      ' Get the Rectangle for AutoCrop with tolerance = threshold passes by the user.
      command.Run(leadImage)
      MessageBox.Show("Left = " + command.Rectangle.Left.ToString() + Chr(13) + "Top = " + command.Rectangle.Top.ToString() + Chr(13) + "Right = " + command.Rectangle.Right.ToString() + Chr(13) + "Bottom = " + command.Rectangle.Bottom.ToString())
   Catch e As Exception
      MessageBox.Show(e.Message)
   End Try

End Sub

Public NotInheritable Class LEAD_VARS
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class
C#Copy Code
public void AutoCropRectangleConstructorExample()
   {
      // Load an image
      RasterCodecs codecs = new RasterCodecs();
      codecs.ThrowExceptionsOnInvalidImages = true;

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

      // Prepare the command
      int threshold = 0;
      try
      {
         AutoCropRectangleCommand command = new AutoCropRectangleCommand(threshold);
         // Get the Rectangle for AutoCrop with tolerance = threshold passes by the user.
         command.Run(image);
         MessageBox.Show("Left = " + command.Rectangle.Left.ToString() + "\n" + 
            "Top = " + command.Rectangle.Top.ToString() + "\n" +
            "Right = " + command.Rectangle.Right.ToString() + "\n" + 
            "Bottom = " + command.Rectangle.Bottom.ToString());
      }
      catch(Exception exception)
      {
         MessageBox.Show(exception.Message);
      }

   }

static class LEAD_VARS
{
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}
SilverlightCSharpCopy Code
public void AutoCropRectangleConstructorExample(RasterImage image)
{
   // Prepare the command
   int threshold = 0;
   AutoCropRectangleCommand command = new AutoCropRectangleCommand(threshold);
   // Get the Rectangle for AutoCrop with tolerance = threshold passes by the user.
   command.Run(image);
   Debug.WriteLine("Left = " + command.Rectangle.Left.ToString() + "\n" +
      "Top = " + command.Rectangle.Top.ToString() + "\n" +
      "Right = " + command.Rectangle.Right.ToString() + "\n" +
      "Bottom = " + command.Rectangle.Bottom.ToString());
   image.Dispose();
}
SilverlightVBCopy Code
Public Sub AutoCropRectangleConstructorExample(ByVal image As RasterImage)
   ' Prepare the command
   Dim threshold As Integer = 0
   Dim command As AutoCropRectangleCommand = New AutoCropRectangleCommand(threshold)
   ' Get the Rectangle for AutoCrop with tolerance = threshold passes by the user.
   command.Run(image)
   Debug.WriteLine("Left = " & command.Rectangle.Left.ToString() & Constants.vbLf & "Top = " & command.Rectangle.Top.ToString() & Constants.vbLf & "Right = " & command.Rectangle.Right.ToString() & Constants.vbLf & "Bottom = " & command.Rectangle.Bottom.ToString())
   image.Dispose()
End Sub

Remarks

For more information, refer to Introduction to Image Processing With LEADTOOLS.

Requirements

Target Platforms: Silverlight 3.0, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7, MAC OS/X (Intel Only)

See Also