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



Gets the rectangle to be used to trim the image if AutoCropCommand were used.

Syntax

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

Example

Run the AutoCropRectangleCommand on an image.

Visual BasicCopy Code
Public Sub AutoCropRectangleCommandExample()
   RasterCodecs.Startup()
   Dim codecs As New RasterCodecs()
   codecs.ThrowExceptionsOnInvalidImages = True

   Dim leadImage As RasterImage = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "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())

   RasterCodecs.Shutdown()
End Sub
C#Copy Code
public void AutoCropRectangleCommandExample() 
{ 
   // Load an image 
   RasterCodecs.Startup(); 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "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()); 
 
   RasterCodecs.Shutdown(); 
}

Remarks

  • Use this command in conjunction with 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 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: Microsoft .NET Framework 2.0, Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

See Also