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AutoCropRectangleCommand Class
See Also  Members  
Leadtools.ImageProcessing.Core Namespace : AutoCropRectangleCommand Class



Gets the rectangle to be used to trim the image if AutoCropCommand were used. Supported in Silverlight, Windows Phone 7

Object Model

AutoCropRectangleCommand Class

Syntax

Visual Basic (Declaration) 
Public Class AutoCropRectangleCommand 
   Inherits Leadtools.ImageProcessing.RasterCommand
   Implements IRasterCommand 
Visual Basic (Usage)Copy Code
Dim instance As AutoCropRectangleCommand
C# 
public class AutoCropRectangleCommand : Leadtools.ImageProcessing.RasterCommand, IRasterCommand 
C++/CLI 
public ref class AutoCropRectangleCommand : public Leadtools.ImageProcessing.RasterCommand, IRasterCommand 

Example

Run the Leadtools.ImageProcessing.Core.AutoCropRectangleCommand on an image.

Visual BasicCopy Code
Public Sub AutoCropRectangleCommandExample()
   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 AutoCropRectangleCommand = New AutoCropRectangleCommand
   command.Threshold = 0
   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())

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 AutoCropRectangleCommandExample()
   {
      // Load an image
      RasterCodecs codecs = new RasterCodecs();
      codecs.ThrowExceptionsOnInvalidImages = true;

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

      // Prepare the command
      AutoCropRectangleCommand command = new AutoCropRectangleCommand();
      command.Threshold = 0;
      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());

   }

static class LEAD_VARS
{
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}
SilverlightCSharpCopy Code
public void AutoCropRectangleCommandExample(RasterImage image)
{
   // Prepare the command
   AutoCropRectangleCommand command = new AutoCropRectangleCommand();
   command.Threshold = 0;
   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 AutoCropRectangleCommandExample(ByVal image As RasterImage)
   ' Prepare the command
   Dim command As AutoCropRectangleCommand = New AutoCropRectangleCommand()
   command.Threshold = 0
   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

  • Use this command in conjunction with Leadtools.ImageProcessing.CropCommand instead of AutoCropCommand when you want to modify the trim rectangle. For example, you could let the user preview the rectangle, or you could add a margin.
  • This command uses image coordinates to specify the area to be trimmed. Therefore, you must account for the view perspective of the image. For information about image coordinates, refer to Leadtools.RasterViewPerspective.
  • This command supports 12 and 16-bit grayscale and 48 and 64-bit color images. Support for 12 and 16-bit grayscale and 48 and 64-bit color images is available only in the Document/Medical toolkits.
  • This command does not support signed data images.
  • This command does not support 32-bit grayscale images.

Inheritance Hierarchy

System.Object
   Leadtools.ImageProcessing.RasterCommand
      Leadtools.ImageProcessing.Core.AutoCropRectangleCommand

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