Visual Basic (Declaration) | |
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Public Class HolePunchRemoveCommand Inherits Leadtools.ImageProcessing.RasterCommand Implements IRasterCommand |
Visual Basic (Usage) | Copy Code |
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Dim instance As HolePunchRemoveCommand |
C# | |
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public class HolePunchRemoveCommand : Leadtools.ImageProcessing.RasterCommand, IRasterCommand |
C++/CLI | |
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public ref class HolePunchRemoveCommand : public Leadtools.ImageProcessing.RasterCommand, IRasterCommand |
Run the HolePunchRemoveCommand on an image.
Visual Basic | Copy Code |
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Public WithEvents holePunchCommand_S1 As HolePunchRemoveCommand Public Sub HolePunchRemoveCommandExample() Dim codecs As New RasterCodecs() codecs.ThrowExceptionsOnInvalidImages = True Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Clean.tif")) ' Prepare the command holePunchCommand_S1 = New HolePunchRemoveCommand holePunchCommand_S1.Flags = HolePunchRemoveCommandFlags.UseDpi Or HolePunchRemoveCommandFlags.UseCount Or HolePunchRemoveCommandFlags.UseLocation holePunchCommand_S1.Location = HolePunchRemoveCommandLocation.Left holePunchCommand_S1.MaximumHoleCount = 4 holePunchCommand_S1.MinimumHoleCount = 2 holePunchCommand_S1.Run(leadImage) End Sub Private Sub HolePunchCommand_HolePunchRemove_S1(ByVal sender As Object, ByVal e As HolePunchRemoveCommandEventArgs) Handles holePunchCommand_S1.HolePunchRemove MessageBox.Show("Size " + "( " + e.BoundingRectangle.Left.ToString() + ", " + e.BoundingRectangle.Top.ToString() + ") - " + "( " + e.BoundingRectangle.Right.ToString() + ", " + e.BoundingRectangle.Bottom.ToString() + ")" + _ Chr(13) + " Hole Index " + e.HoleIndex.ToString() + _ Chr(13) + " Holes Total Count " + e.HoleTotalCount.ToString() + _ Chr(13) + " Black Count " + e.BlackCount.ToString() + _ Chr(13) + " White Count " + e.WhiteCount.ToString()) e.Status = RemoveStatus.Remove End Sub Public NotInheritable Class LEAD_VARS Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images" End Class |
C# | Copy Code |
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public void HolePunchRemoveCommandExample() { // Load an image RasterCodecs codecs = new RasterCodecs(); codecs.ThrowExceptionsOnInvalidImages = true; RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Clean.tif")); // Prepare the command HolePunchRemoveCommand command = new HolePunchRemoveCommand(); command.HolePunchRemove += new EventHandler<HolePunchRemoveCommandEventArgs>(HolePunchRemoveEvent_S1); command.Flags = HolePunchRemoveCommandFlags.UseDpi | HolePunchRemoveCommandFlags.UseCount | HolePunchRemoveCommandFlags.UseLocation; command.Location = HolePunchRemoveCommandLocation.Left; command.MaximumHoleCount = 4; command.MinimumHoleCount = 2; command.Run(image); } private void HolePunchRemoveEvent_S1(object sender, HolePunchRemoveCommandEventArgs e) { MessageBox.Show("Size " + "( " + e.BoundingRectangle.Left + ", " + e.BoundingRectangle.Top + ") - " + "( " + e.BoundingRectangle.Right + ", " + e.BoundingRectangle.Bottom + ")" + "\n Hole Index " + e.HoleIndex.ToString() + "\n Holes Total Count " + e.HoleTotalCount.ToString() + "\n Black Count " + e.BlackCount.ToString() + "\n White Count " + e.WhiteCount.ToString()); e.Status= RemoveStatus.Remove; } static class LEAD_VARS { public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; } |
SilverlightCSharp | Copy Code |
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SilverlightVB | Copy Code |
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- This command detects and removes hole punches that are common in scanned documents. The behavior of this command can be modified by using the HolePunchRemoveCommandEventHandler delegate method.
- This command works only on 1-bit black and white images.
- Hole punch configurations may consist of 2 or more holes.
- If a region is selected, only the selected region will be changed by this command. If no region is selected, the whole image will be processed.
- This command does not support signed data images.
- This command 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 LineRemoveCommand command 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.
System.Object
Leadtools.ImageProcessing.RasterCommand
Leadtools.ImageProcessing.Core.HolePunchRemoveCommand
Target Platforms: Silverlight 3.0, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7, MAC OS/X (Intel Only)
Reference
HolePunchRemoveCommand MembersLeadtools.ImageProcessing.Core Namespace
Cleaning Up 1-Bit Images
SmoothCommand Class
BorderRemoveCommand Class
LineRemoveCommand Class
InvertedTextCommand Class
InvertedPageCommand Class
DotRemoveCommand Class
HighQualityRotateCommand Class
MinimumCommand Class
MaximumCommand Class
Leadtools.ImageProcessing.Effects.RegionHolesRemovalCommand