←Select platform

AutoCropCommand Class

Trims the current image, removing blank space around the edges.
public class AutoCropCommand : RasterCommand 
Public Class AutoCropCommand  
   Inherits RasterCommand 
@interface LTAutoCropCommand : LTRasterCommand 
public class AutoCropCommand extends RasterCommand 
public ref class AutoCropCommand : public RasterCommand   
  • 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.

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; 
static class LEAD_VARS 
   public const string ImagesDir = @"C:\LEADTOOLS21\Resources\Images"; 
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 
End Sub 
Public NotInheritable Class LEAD_VARS 
   Public Const ImagesDir As String = "C:\LEADTOOLS21\Resources\Images" 
End Class 

Target Platforms

Help Version 21.0.2021.3.3
Products | Support | Contact Us | Intellectual Property Notices
© 1991-2021 LEAD Technologies, Inc. All Rights Reserved.

Leadtools.ImageProcessing.Core Assembly