AutoCropRectangleCommand Constructor(int)

Summary

Initializes a new AutoCropRectangleCommand class object with explicit parameters.

Syntax

Objective-C

C++

Java

public AutoCropRectangleCommand( 
   int threshold 
)

Public Function New( _ 
   ByVal threshold As Integer _ 
)

- (id)initWithThreshold:(NSUInteger)threshold

public AutoCropRectangleCommand(int 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.

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"; 
}

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

c#[Silverlight C# Example] 
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(); 
} 
vb[Silverlight VB Example] 
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

Requirements

Target Platforms

Reference

AutoCropRectangleCommand Class

AutoCropRectangleCommand Members

Overload List

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Help Version 20.0.2020.4.3

Leadtools.ImageProcessing.Core Assembly

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Leadtools.ImageProcessing.Core Namespace

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