AutoCropRectangleCommand Class

C#
Visual Basic
WinRT C#
Java
Objective-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

@interface LTAutoCropRectangleCommand : LTRasterCommand

public class AutoCropRectangleCommand extends RasterCommand

function Leadtools.ImageProcessing.Core.AutoCropRectangleCommand()

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

Use this command in conjunction with 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 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.

Run the AutoCropRectangleCommand on an image.

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

Copy Code

Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing.Core

   
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

using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing.Core;

      
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());
      }
   });
}

using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing.Core;

      
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());

}

using Leadtools;
using Leadtools.Examples;
using Leadtools.Codecs;
using Leadtools.ImageProcessing.Core;

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();
}

Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing.Core

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

Reference

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