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HolePunchRemoveActivity Class
See Also  Members  
Leadtools.Workflow.ImageProcessing Namespace : HolePunchRemoveActivity Class



The HolePunchRemoveActivity Class is available in LEADTOOLS Document and Medical Imaging toolkits.

Finds and removes hole punches. This activity is available in the Document/Medical Toolkits.

Object Model

HolePunchRemoveActivity Class

Syntax

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

Remarks

  • This activity detects and removes hole punches that are common in scanned documents.
  • This activity works only on 1-bit black and white images.
  • Hole punch configurations may consist of 2 or more holes.
  • This activity does not support signed data images.
  • This activity does not support 32-bit grayscale images.
  • Before calling this function, ensure that the hole punch is free of any other stray marks. If you do not, the hole will not be recognized. Use the LineRemoveActivity activity to remove any horizontal or vertical lines from the image. Use the other Document Cleanup functions to remove other imaging artifacts such as dots, blobs, borders, inverted text, bumps and nicks. This will have the added benefit of making your image smaller when compressed.

For example, the following image must have the vertical line removed:

Once the image has been cleaned, as shown in the following figure, the hole punch can be removed:

For more information, refer to Cleaning Up 1-Bit Images.

Inheritance Hierarchy

System.Object
   System.Workflow.ComponentModel.DependencyObject
      System.Workflow.ComponentModel.Activity
         Leadtools.Workflow.Raster.WorkflowImageActivity
            Leadtools.Workflow.Raster.DisposableImageActivity
               Leadtools.Workflow.ImageProcessing.ImageProcessingBaseActivity
                  Leadtools.Workflow.ImageProcessing.HolePunchRemoveActivity

Requirements

Target Platforms: Microsoft .NET Framework 3.0, Windows 2000, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7

See Also

Leadtools.Workflow.ImageProcessing requires a Document or Medical toolkit license and unlock key. For more information, refer to: Imaging Pro/Document/Medical Features