AutoCropRectangleCommand Constructor(Int32)

C#
Visual Basic
WinRT C#
Java
Objective-C
WinRT JavaScript
C++

public AutoCropRectangleCommand( 
   int threshold
)

'Declaration

Public Function New( _
   ByVal threshold As Integer _
)

'Usage

Dim threshold As Integer
 
Dim instance As New AutoCropRectangleCommand(threshold)

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.

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

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

C#
Visual Basic
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

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";
}

function AutoCropRectangleConstructorExample()
{
   var codecs = new Leadtools.Codecs.RasterCodecs();
   codecs.throwExceptionsOnInvalidImages = true;

   // Load the image
   var srcFileName = "Assets\\IMAGE1.CMP";
   return Tools.AppInstallFolder().getFileAsync(srcFileName).then(function (loadFile) {
      return codecs.loadAsync(Leadtools.LeadStreamFactory.create(loadFile));
   }).then(function (image){
      // Prepare the command
      with (Leadtools.ImageProcessing.Core) {
         var threshold = 0;
         var command = new AutoCropRectangleCommand(threshold);
         // Get the Rectangle for AutoCrop with tolerance = threshold passes by the user.
         command.run(image);
         console.error("Left = " + command.rectangle.x.toString() + "\n" +
               "Top = " + command.rectangle.y.toString() + "\n" +
               "Right = " + command.rectangle.width.toString() + "\n" +
               "Bottom = " + command.rectangle.height.toString());
      }
   });
}

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

Target Platforms

Reference

AutoCropRectangleCommand Class
AutoCropRectangleCommand Members
Overload List