ExpandContentCommand Class

Summary

Detects the boundaries of the document's content and expands it to fill the entire page space.

Syntax

C++

public class ExpandContentCommand : RasterCommand

Public Class ExpandContentCommand  
   Inherits RasterCommand

public ref class ExpandContentCommand : public RasterCommand

Remarks

Expands page's content while maintaining the aspect ratio of the original size.
This function can only process entire images. It does not support regions.
This function supports 24-bit and 36-bit color images and 8-bit grayscale images.
Converts the input image to a 1-bit image.

Example

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Core; 
 
public void AutoPageSplitterCommandExample() 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   //Load an image 
   RasterImage DocImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "ScannedBook.jpg")); 
 
   //Binarize image 
   ColorResolutionCommand command = new ColorResolutionCommand(); 
   command.BitsPerPixel = 1; 
   command.Run(DocImage); 
 
   // Clean up border 
   BorderRemoveCommand BorderCommand = new BorderRemoveCommand(); 
   BorderCommand.Flags = BorderRemoveCommandFlags.AutoRemove; 
   BorderCommand.Run(DocImage); 
 
   // Split pages 
   AutoPageSplitterCommand SpliteCommand = new AutoPageSplitterCommand(); 
   SpliteCommand.Run(DocImage); 
 
   // Get left Page 
   RasterImage LeftPage = SpliteCommand.FirstImage; 
 
   //Expand the content of the left page  
   ExpandContentCommand ExpandComment = new ExpandContentCommand(); 
   ExpandComment.Run(LeftPage); 
 
   // Save the resulting image 
   codecs.Save(LeftPage, Path.Combine(LEAD_VARS.ImagesDir, "LeftPage.bmp"), RasterImageFormat.Bmp, 24); 
 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; 
}

Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing 
Imports Leadtools.ImageProcessing.Core 
 
Public Sub AutoPageSplitterCommandExample() 
   Dim codecs As RasterCodecs = New RasterCodecs() 
   codecs.ThrowExceptionsOnInvalidImages = True 
 
   'Load an image 
   Dim DocImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "\MultiPage_OneBit.tif")) 
 
   ' Clean up border 
   Dim BorderCommand As BorderRemoveCommand = New BorderRemoveCommand() 
   BorderCommand.Flags = BorderRemoveCommandFlags.AutoRemove 
   BorderCommand.Run(DocImage) 
 
   'Binarize image 
   Dim command As ColorResolutionCommand = New ColorResolutionCommand() 
   command.Run(DocImage) 
 
   ' Split pages 
   Dim SpliteCommand As AutoPageSplitterCommand = New AutoPageSplitterCommand() 
   SpliteCommand.Run(DocImage) 
 
   ' Get left Page 
   Dim LeftPage As RasterImage = SpliteCommand.FirstImage 
 
   'Expand the content of the left page  
   Dim ExpandComment As ExpandContentCommand = New ExpandContentCommand() 
   ExpandComment.Run(LeftPage) 
 
   ' Save the resulting image 
   codecs.Save(LeftPage, Path.Combine(LEAD_VARS.ImagesDir, "LeftPage.bmp"), RasterImageFormat.Bmp, 24) 
 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images" 
End Class

Requirements

Target Platforms

Reference

ExpandContentCommand Members

Leadtools.ImageProcessing.Core Namespace

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Help Version 20.0.2020.4.3

Leadtools.ImageProcessing.Core Assembly

Introduction

Getting Started

Namespaces

Leadtools.ImageProcessing.Core Namespace

Assemblies