AutoCropCommand Class

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

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

'Declaration

Public Class AutoCropCommand 
   Inherits Leadtools.ImageProcessing.RasterCommand
   Implements Leadtools.ImageProcessing.IRasterCommand

'Usage

Dim instance As AutoCropCommand

public sealed class AutoCropCommand : Leadtools.ImageProcessing.IRasterCommand

@interface LTAutoCropCommand : LTRasterCommand

public class AutoCropCommand extends RasterCommand

function Leadtools.ImageProcessing.Core.AutoCropCommand()

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

Generally, this command is used for automatically trimming blank space from the edges of scanned documents.
Nevertheless, because this command uses changes in intensity to detect blank space, it can trim edges of any color or intensity.
If a region is defined for the image, the region is also trimmed if necessary.
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 supports unsigned data images, but not signed ones.
This command does not support 32-bit grayscale images.

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

Run the AutoCropCommand on an image and then AutoCrops the 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 AutoCropCommandExample()
   Dim codecs As New RasterCodecs()
   codecs.ThrowExceptionsOnInvalidImages = True
   Dim image As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "clean.tif"))

   ' Prepare the command
   Dim command As AutoCropCommand = New AutoCropCommand()
   ' AutoCrop the image with 20 tolerance.
   command.Threshold = 20
   command.Run(image)

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 AutoCropCommandExample()
{
   // Load an image
   RasterCodecs codecs = new RasterCodecs();
   codecs.ThrowExceptionsOnInvalidImages = true;
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "clean.tif"));

   // Prepare the command
   AutoCropCommand command   = new AutoCropCommand();
   //AutoCrop the image with 20 tolerance.
   command.Threshold         = 20;
   command.Run(image);

}

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

function AutoCropCommandExample()
{
   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 AutoCropCommand();
         //AutoCrop the image with 20 tolerance.
         command.threshold = 20;
         command.run(image);
      }
   });
}

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

      
public async Task AutoCropCommandExample()
{
   // 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
   AutoCropCommand command   = new AutoCropCommand();
   //AutoCrop the image with 20 tolerance.
   command.Threshold         = 20;
   command.Run(image);

}

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

public void AutoCropCommandExample(RasterImage image, Stream outStream)
{
   // Prepare the command
   AutoCropCommand command   = new AutoCropCommand();
   //AutoCrop the image with 20 tolerance.
   command.Threshold         = 20;
   command.Run(image);
   // Save result image
   RasterCodecs codecs = new RasterCodecs();
   codecs.Save(image, outStream, RasterImageFormat.CcittGroup4, 1);
   image.Dispose();
}

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

Public Sub AutoCropCommandExample(ByVal image As RasterImage, ByVal outStream As Stream)
   ' Prepare the command
   Dim command As AutoCropCommand = New AutoCropCommand()
   'AutoCrop the image with 20 tolerance.
   command.Threshold = 20
   command.Run(image)
   ' Save result image
   Dim codecs As RasterCodecs = New RasterCodecs()
   codecs.Save(image, outStream, RasterImageFormat.CcittGroup4, 1)
   image.Dispose()
End Sub

Target Platforms

Reference

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