![](dotnetdiagramimages/Leadtools_ImageProcessing_Core_Leadtools_ImageProcessing_Core_InvertedTextCommand.png)
Visual Basic (Declaration) | |
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Public Class InvertedTextCommand Inherits Leadtools.ImageProcessing.RasterCommand Implements IRasterCommand |
Visual Basic (Usage) | ![]() |
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Dim instance As InvertedTextCommand |
C# | |
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public class InvertedTextCommand : Leadtools.ImageProcessing.RasterCommand, IRasterCommand |
C++/CLI | |
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public ref class InvertedTextCommand : public Leadtools.ImageProcessing.RasterCommand, IRasterCommand |
Runs the InvertedTextCommand on an image.
Visual Basic | ![]() |
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Public WithEvents invertedTextCommand_S1 As InvertedTextCommand Public Sub InvertedTextCommandExample() Dim codecs As New RasterCodecs() codecs.ThrowExceptionsOnInvalidImages = True Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Clean.tif")) ' Prepare the command invertedTextCommand_S1 = New InvertedTextCommand invertedTextCommand_S1.Flags = InvertedTextCommandFlags.UseDpi invertedTextCommand_S1.MaximumBlackPercent = 95 invertedTextCommand_S1.MinimumBlackPercent = 70 invertedTextCommand_S1.MinimumInvertHeight = 500 invertedTextCommand_S1.MinimumInvertWidth = 5000 invertedTextCommand_S1.Run(leadImage) End Sub Private Sub InvertedTextCommand_InvertedText_S1(ByVal sender As Object, ByVal e As InvertedTextCommandEventArgs) Handles invertedTextCommand_S1.InvertedText MessageBox.Show("Size " + "( " + e.BoundingRectangle.Left.ToString() + ", " + e.BoundingRectangle.Top.ToString() + ") - " + "( " + e.BoundingRectangle.Right.ToString() + ", " + e.BoundingRectangle.Bottom.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# | ![]() |
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public void InvertedTextCommandExample() { // Load an image RasterCodecs codecs = new RasterCodecs(); codecs.ThrowExceptionsOnInvalidImages = true; RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Clean.tif")); // Prepare the command InvertedTextCommand command = new InvertedTextCommand(); command.InvertedText += new EventHandler<InvertedTextCommandEventArgs>(InvertedTextEvent_S1); command.Flags = InvertedTextCommandFlags.UseDpi; command.MaximumBlackPercent = 95; command.MinimumBlackPercent = 70; command.MinimumInvertHeight = 500; command.MinimumInvertWidth = 5000; command.Run(image); } private void InvertedTextEvent_S1(object sender, InvertedTextCommandEventArgs e) { MessageBox.Show("Size " + "( " + e.BoundingRectangle.Left + ", " + e.BoundingRectangle.Top + ") - " + "( " + e.BoundingRectangle.Right + ", " + e.BoundingRectangle.Bottom + ")" + "\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 | ![]() |
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public void InvertedTextCommandExample(RasterImage image, Stream outStream) { // Prepare the command InvertedTextCommand command = new InvertedTextCommand(); command.InvertedText += new EventHandler<InvertedTextCommandEventArgs>(InvertedTextEvent_S1); command.Flags = InvertedTextCommandFlags.UseDpi; command.MaximumBlackPercent = 95; command.MinimumBlackPercent = 70; command.MinimumInvertHeight = 500; command.MinimumInvertWidth = 5000; command.Run(image); // Save result image RasterCodecs codecs = new RasterCodecs(); codecs.Save(image, outStream, RasterImageFormat.CcittGroup4, 1); image.Dispose(); } private void InvertedTextEvent_S1(object sender, InvertedTextCommandEventArgs e) { Debug.WriteLine("Size " + "( " + e.BoundingRectangle.Left + ", " + e.BoundingRectangle.Top + ") - " + "( " + e.BoundingRectangle.Right + ", " + e.BoundingRectangle.Bottom + ")" + "\n Black Count " + e.BlackCount.ToString() + "\n White Count " + e.WhiteCount.ToString()); e.Status = RemoveStatus.Remove; } |
SilverlightVB | ![]() |
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Public Sub InvertedTextCommandExample(ByVal image As RasterImage, ByVal outStream As Stream) ' Prepare the command Dim command As InvertedTextCommand = New InvertedTextCommand() AddHandler command.InvertedText, AddressOf InvertedTextEvent_S1 command.Flags = InvertedTextCommandFlags.UseDpi command.MaximumBlackPercent = 95 command.MinimumBlackPercent = 70 command.MinimumInvertHeight = 500 command.MinimumInvertWidth = 5000 command.Run(image) ' Save result image Dim codecs As RasterCodecs = New RasterCodecs() codecs.Save(image, outStream, RasterImageFormat.CcittGroup4, 1) image.Dispose() End Sub Private Sub InvertedTextEvent_S1(ByVal sender As Object, ByVal e As InvertedTextCommandEventArgs) Debug.WriteLine("Size " & "( " & e.BoundingRectangle.Left & ", " & e.BoundingRectangle.Top & ") - " & "( " & e.BoundingRectangle.Right & ", " & e.BoundingRectangle.Bottom & ")" & Constants.vbLf & " Black Count " & e.BlackCount.ToString() & Constants.vbLf & " White Count " & e.WhiteCount.ToString()) e.Status = RemoveStatus.Remove End Sub |
- This command finds and modifies areas of inverted text that are common in scanned text documents. Below is an example of inverted text:
Modifying the area of inverted text yields the following:
- The behavior of this command can be modified by using an Event Handler that handles the InvertedTextCommandEventArgs.
- This command works only on 1-bit black and white images.
- If a region is selected, only the selected region will be changed by this method. 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.
System.Object
Leadtools.ImageProcessing.RasterCommand
Leadtools.ImageProcessing.Core.InvertedTextCommand
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
InvertedTextCommand MembersLeadtools.ImageProcessing.Core Namespace
Cleaning Up 1-Bit Images
SmoothCommand Class
BorderRemoveCommand Class
LineRemoveCommand Class
InvertedPageCommand Class
DotRemoveCommand Class
HolePunchRemoveCommand Class
HighQualityRotateCommand Class
MinimumCommand Class
MaximumCommand Class
Leadtools.ImageProcessing.Effects.RegionHolesRemovalCommand