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Flags Property

Summary

Flags that indicate whether the page is empty or noisy, whether to ignore bleed-through, whether to ignore lines, whether to use the active area, and whether to use the default or the user-specified margins. Note: Some flags are being deprecated in Version 20.

Syntax
C#
VB
Objective-C
C++
Java
public BlankPageDetectorCommandFlags Flags { get; set; } 
Public Property Flags As BlankPageDetectorCommandFlags 
@property (nonatomic, assign) LTBlankPageDetectorCommandFlags flags 
public int getFlags() 
public void setFlags(int value) 

Property Value

Flags that indicate whether the page is empty or noisy, whether to ignore bleed-through, whether to ignore lines, whether to use the active area, and whether to use the default or the user-specified margins. The default value is:

BlankPageDetectorCommandFlags::DetectEmptyPage |  
BlankPageDetectorCommandFlags::DontUseBleedThrough |    
BlankPageDetectorCommandFlags::DontDetectLinedPage |    
BlankPageDetectorCommandFlags::DontUseActiveArea |    
BlankPageDetectorCommandFlags::UseDefaultMargins 

Deprecated BlankPageDetectorCommandFlags Members

The following members are being deprecated in Version 20. They will be removed from the toolkits, effective with LEADTOOLS version 21.

  • DetectEmptyPage
  • DontUseBleedThrough
  • DontDetectLinedPage
  • DontUseActiveArea
  • UseDefaultMargins

Example

Runs the BlankPageDetectorCommand on an image and determines whether it is blank.

C#
VB
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Core; 
 
public void BlankPageDetectorCommandExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Clean.tif")); 
 
   // Prepare the command 
   BlankPageDetectorCommand command = new BlankPageDetectorCommand(); 
   //Determine whether the image is a blank page 
   command.Flags = BlankPageDetectorCommandFlags.DetectNoisyPage; 
   command.Run(image); 
 
   MessageBox.Show(" Is Blank   : " + command.IsBlank + "\n Accuracy : " + (command.Accuracy * 1.0 / 100) + "%", "Blank Page Detection Results"); 
 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; 
} 
Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing.Core 
 
Public Sub BlankPageDetectorCommandExample() 
   Dim codecs As New RasterCodecs() 
   codecs.ThrowExceptionsOnInvalidImages = True 
 
   Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Clean.tif")) 
 
   ' Prepare the command 
   Dim command As BlankPageDetectorCommand = New BlankPageDetectorCommand 
   'Determine whether the image is blank. 
   command.Flags = BlankPageDetectorCommandFlags.DetectNoisyPage 
 
   command.Run(leadImage) 
   MessageBox.Show(" Is Blank   : " & command.IsBlank & "\n Accuracy : " & (command.Accuracy * 1.0 / 100) & "%", "Blank Page Detection Results") 
 
 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images" 
End Class 
c#[Silverlight C# Example] 
using Leadtools; 
using Leadtools.Examples; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Core; 
 
public void BlankPageDetectorCommandExample(RasterImage image) 
{ 
   // Prepare the command 
   BlankPageDetectorCommand command = new BlankPageDetectorCommand(); 
   //Determine whether the image is a blank page 
   command.Flags = BlankPageDetectorCommandFlags.DetectNoisyPage; 
   command.Run(image); 
 
   Debug.WriteLine(" Is Blank   : " + command.IsBlank + "\n Accuracy : " + (command.Accuracy * 1.0 / 100) + "%", "Blank Page Detection Results", MessageBoxButton.OK); 
 
   image.Dispose(); 
} 
vb[Silverlight VB Example] 
Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing.Core 
 
Public Sub BlankPageDetectorCommandExample(ByVal image As RasterImage) 
   ' Prepare the command 
   Dim command As BlankPageDetectorCommand = New BlankPageDetectorCommand() 
   'Determine whether the image is a blank page 
   command.Flags = BlankPageDetectorCommandFlags.DetectNoisyPage 
   command.Run(image) 
 
   Debug.WriteLine(" Is Blank   : " & command.IsBlank + Constants.vbLf & " Accuracy : " & (command.Accuracy * 1.0 / 100) & "%", 
                   "Blank Page Detection Results", MessageBoxButton.OK) 
 
   image.Dispose() 
End Sub 

Requirements

Target Platforms

Help Version 20.0.2020.4.3
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Leadtools.ImageProcessing.Core Assembly