AutoCropRectangleCommand Class

Visual Basic
C#
WinRT C#
WinRT JavaScript
C++

public class AutoCropRectangleCommand : Leadtools.ImageProcessing.RasterCommand, Leadtools.ImageProcessing.IRasterCommand

'Declaration
 
Public Class AutoCropRectangleCommand 
   Inherits Leadtools.ImageProcessing.RasterCommand
   Implements Leadtools.ImageProcessing.IRasterCommand

'Usage
 
Dim instance As AutoCropRectangleCommand

public sealed class AutoCropRectangleCommand : Leadtools.ImageProcessing.IRasterCommand

function Leadtools.ImageProcessing.Core.AutoCropRectangleCommand()

public ref class AutoCropRectangleCommand : public Leadtools.ImageProcessing.RasterCommand, Leadtools.ImageProcessing.IRasterCommand

Use this command in conjunction with Leadtools.ImageProcessing.CropCommand instead of AutoCropCommand when you want to modify the trim rectangle. For example, you could let the user preview the rectangle, or you could add a margin.
This command uses image coordinates to specify the area to be trimmed. Therefore, you must account for the view perspective of the image. For information about image coordinates, refer to Leadtools.RasterViewPerspective.
This command supports 12 and 16-bit grayscale and 48 and 64-bit color images. Support for 12 and 16-bit grayscale and 48 and 64-bit color images is available only in the Document/Medical toolkits.
This command does not support signed data images.
This command does not support 32-bit grayscale images.

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

Public Sub AutoCropRectangleCommandExample()
   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 command As AutoCropRectangleCommand = New AutoCropRectangleCommand
   command.Threshold = 0
   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())

End Sub

Public NotInheritable Class LEAD_VARS
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class

public void AutoCropRectangleCommandExample()
   {
      // Load an image
      RasterCodecs codecs = new RasterCodecs();
      codecs.ThrowExceptionsOnInvalidImages = true;

      RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Master.jpg"));

      // Prepare the command
      AutoCropRectangleCommand command = new AutoCropRectangleCommand();
      command.Threshold = 0;
      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());

   }

static class LEAD_VARS
{
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}

function AutoCropRectangleCommandExample()
{
   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 command = new AutoCropRectangleCommand();
         command.threshold = 0;
         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());
      }
   });
}

[TestMethod]
public async Task AutoCropRectangleCommandExample()
{
   // 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
   AutoCropRectangleCommand command = new AutoCropRectangleCommand();
   command.Threshold = 0;
   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());

}

public void AutoCropRectangleCommandExample(RasterImage image)
{
   // Prepare the command
   AutoCropRectangleCommand command = new AutoCropRectangleCommand();
   command.Threshold = 0;
   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();
}

Public Sub AutoCropRectangleCommandExample(ByVal image As RasterImage)
   ' Prepare the command
   Dim command As AutoCropRectangleCommand = New AutoCropRectangleCommand()
   command.Threshold = 0
   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: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

AutoCropRectangleCommand Members
Leadtools.ImageProcessing.Core Namespace
Introduction to Image Processing With LEADTOOLS
AutoCropCommand Class
Leadtools.ImageProcessing.CropCommand
Leadtools.ImageProcessing.CopyRectangleCommand
WindowLevelCommand Class