←Select platform

AutoCropRectangleCommand Constructor(Int32)

Summary

Initializes a new AutoCropRectangleCommand class object with explicit parameters.

Syntax

Java

Objective-C

WinRT C#

C++

public AutoCropRectangleCommand(  
   int threshold 
)

Public Function New( _ 
   ByVal threshold As Integer _ 
)

public AutoCropRectangleCommand(  
   int threshold 
)

- (id)initWithThreshold:(NSUInteger)threshold

public AutoCropRectangleCommand(int threshold)

function AutoCropRectangleCommand(  
   threshold  
)

public: 
AutoCropRectangleCommand(  
   int threshold 
)

Parameters

threshold
Delta value for detecting blank space. Starting at each edge of the image and evaluating toward the center, any change in intensity that is less than or equal to this parameter is considered blank space. Valid values are 0 to 255.

Remarks

For more information, refer to Introduction to Image Processing With LEADTOOLS.

Example

Run the AutoCropRectangleCommand on an image to get the AutoCrop rectangle.

WinRT C#

Silverlight C#

Silverlight VB

Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing.Core 
 
    
Public Sub AutoCropRectangleConstructorExample() 
   Dim codecs As New RasterCodecs() 
   codecs.ThrowExceptionsOnInvalidImages = True 
   Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Master.jpg")) 
 
   ' Prepare the command 
   Dim threshold As Integer = 0 
   Try 
      Dim command As AutoCropRectangleCommand 
      command = New AutoCropRectangleCommand(threshold) 
      ' Get the Rectangle for AutoCrop with tolerance = threshold passes by the user. 
      command.Run(leadImage) 
      MessageBox.Show("Left = " + command.Rectangle.Left.ToString() + Chr(13) + "Top = " + command.Rectangle.Top.ToString() + Chr(13) + "Right = " + command.Rectangle.Right.ToString() + Chr(13) + "Bottom = " + command.Rectangle.Bottom.ToString()) 
   Catch e As Exception 
      MessageBox.Show(e.Message) 
   End Try 
 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images" 
End Class

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Core; 
 
       
public void AutoCropRectangleConstructorExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Master.jpg")); 
 
   // Prepare the command 
   int threshold = 0; 
   try 
   { 
      AutoCropRectangleCommand command = new AutoCropRectangleCommand(threshold); 
      // Get the Rectangle for AutoCrop with tolerance = threshold passes by the user. 
      command.Run(image); 
      MessageBox.Show("Left = " + command.Rectangle.Left.ToString() + "\n" +  
         "Top = " + command.Rectangle.Top.ToString() + "\n" + 
         "Right = " + command.Rectangle.Right.ToString() + "\n" +  
         "Bottom = " + command.Rectangle.Bottom.ToString()); 
   } 
   catch(Exception exception) 
   { 
      MessageBox.Show(exception.Message); 
   } 
 
} 
 
static class LEAD_VARS 
{ 
public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; 
}

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Core; 
 
       
public async Task AutoCropRectangleConstructorExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
   // Load the image 
   string srcFileName = @"Assets\Image1.cmp"; 
   StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(srcFileName); 
   RasterImage image = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile)); 
 
   // Prepare the command 
   int threshold = 0; 
   try 
   { 
      AutoCropRectangleCommand command = new AutoCropRectangleCommand(threshold); 
      // Get the Rectangle for AutoCrop with tolerance = threshold passes by the user. 
      command.Run(image); 
      Debug.WriteLine("Left = " + command.Rectangle.X.ToString() + "\n" +  
         "Top = " + command.Rectangle.Y.ToString() + "\n" + 
         "Right = " + command.Rectangle.Width.ToString() + "\n" +  
         "Bottom = " + command.Rectangle.Height.ToString()); 
   } 
   catch(Exception exception) 
   { 
      Debug.WriteLine(exception.Message); 
   } 
 
}

using Leadtools; 
using Leadtools.Examples; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Core; 
 
public void AutoCropRectangleConstructorExample(RasterImage image) 
{ 
   // Prepare the command 
   int threshold = 0; 
   AutoCropRectangleCommand command = new AutoCropRectangleCommand(threshold); 
   // Get the Rectangle for AutoCrop with tolerance = threshold passes by the user. 
   command.Run(image); 
   Debug.WriteLine("Left = " + command.Rectangle.Left.ToString() + "\n" + 
      "Top = " + command.Rectangle.Top.ToString() + "\n" + 
      "Right = " + command.Rectangle.Right.ToString() + "\n" + 
      "Bottom = " + command.Rectangle.Bottom.ToString()); 
   image.Dispose(); 
}

Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing.Core 
 
Public Sub AutoCropRectangleConstructorExample(ByVal image As RasterImage) 
   ' Prepare the command 
   Dim threshold As Integer = 0 
   Dim command As AutoCropRectangleCommand = New AutoCropRectangleCommand(threshold) 
   ' Get the Rectangle for AutoCrop with tolerance = threshold passes by the user. 
   command.Run(image) 
   Debug.WriteLine("Left = " & command.Rectangle.Left.ToString() & Constants.vbLf & "Top = " & command.Rectangle.Top.ToString() & _ 
                   Constants.vbLf & "Right = " & command.Rectangle.Right.ToString() & Constants.vbLf & "Bottom = " & _ 
                   command.Rectangle.Bottom.ToString()) 
   image.Dispose() 
End Sub