Leadtools.ImageProcessing.Core Send comments on this topic. | Back to Introduction - All Topics | Help Version 16.5.9.25
AutoCropCommand Class
See Also  Members   Example 
Leadtools.ImageProcessing.Core Namespace : AutoCropCommand Class



Trims the current image, removing blank space around the edges.

Syntax

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

Example

Run the AutoCropCommand on an image and then AutoCrops the image.

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

   Dim image As RasterImage = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "Master.jpg")

   ' Prepare the command
   Dim command As AutoCropCommand = New AutoCropCommand()
   ' AutoCrop the image with 20 tolerance.
   command.Threshold = 20
   command.Run(image)

   RasterCodecs.Shutdown()
End Sub
C#Copy Code
public void AutoCropCommandExample() 
{ 
   // 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 
   AutoCropCommand command   = new AutoCropCommand(); 
   //AutoCrop the image with 20 tolerance. 
   command.Threshold         = 20; 
   command.Run(image); 
 
   RasterCodecs.Shutdown(); 
}

Remarks

  • Generally, this command is used for automatically trimming blank space from the edges of scanned documents.
  • Nevertheless, because this command uses changes in intensity to detect blank space, it can trim edges of any color or intensity.
  • If a region is defined for the image, the region is also trimmed if necessary.
  • 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.
For more information, refer to Introduction to Image Processing With LEADTOOLS.

Inheritance Hierarchy

System.Object
   Leadtools.ImageProcessing.RasterCommand
      Leadtools.ImageProcessing.Core.AutoCropCommand

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