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AutoZoningCommand Class

Summary

Detects different zones (Text, Graphic and Tables) in an image automatically. This is an important feature for OCR pre-processing to improve the recognition results. This function is useful for any application that needs to automatically separate images, tables and text within mixed raster content (MRC) images.

Syntax

Java

Objective-C

WinRT C#

C++

public class AutoZoningCommand : Leadtools.Imageprocessing.Leadtools.ImageProcessing.RasterCommand, Leadtools.Imageprocessing.Leadtools.ImageProcessing.IRasterCommand

Public Class AutoZoningCommand  
   Inherits Leadtools.Imageprocessing.Leadtools.ImageProcessing.RasterCommand 
   Implements Leadtools.Imageprocessing.Leadtools.ImageProcessing.IRasterCommand

public sealed class AutoZoningCommand : Leadtools.Imageprocessing.Leadtools.ImageProcessing.IRasterCommand

@interface LTAutoZoningCommand : LTRasterCommand

public class AutoZoningCommand extends RasterCommand

function Leadtools.ImageProcessing.Core.AutoZoningCommand()

public ref class AutoZoningCommand : public Leadtools.Imageprocessing.Leadtools.ImageProcessing.RasterCommand, Leadtools.Imageprocessing.Leadtools.ImageProcessing.IRasterCommand

Remarks

This command detects different zones and adds the detected zones to the Zones property
This command does not support 12-bit or 16-bit grayscale or 48-bit or 64-bit color images (Exception: Image format not recognized).
This command does not support signed data images (Exception: Signed image data not supported).
This command does not support 32-bit grayscale images.

Note:This command is supported in LEADTOOLS Document Imaging and higher.

Example

WinRT C#

Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing.Core 
 
    
Public Sub AutoZoningCommandExample() 
   ' Load an image 
   Dim codecs As RasterCodecs = New RasterCodecs() 
   codecs.ThrowExceptionsOnInvalidImages = True 
   Dim image As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Sample.mrc")) 
 
   ' Prepare the command 
   Dim command As AutoZoningCommand = New AutoZoningCommand() 
   command.Options = AutoZoningOptions.DontAllowOverlap Or _ 
                     AutoZoningOptions.DetectAccurateZones Or _ 
                     AutoZoningOptions.DetectAll Or _ 
                     AutoZoningOptions.UseMultiThreading 
 
   ' Apply the AutoZoning 
   command.Run(image) 
 
   Dim i As Integer 
   For i = 0 To command.Zones.Count - 1 
      MessageBox.Show("Location :" + command.Zones(i).Bounds.ToString() + "\n" + "Type :" + command.Zones(i).Type.ToString()) 
   Next 
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 AutoZoningCommandExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Sample.mrc")); 
 
   // Prepare the command 
   AutoZoningCommand command = new AutoZoningCommand(); 
   command.Options = AutoZoningOptions.DontAllowOverlap      | 
                     AutoZoningOptions.DetectAccurateZones  |  
                     AutoZoningOptions.DetectAll            | 
                     AutoZoningOptions.UseMultiThreading;  
 
   //Apply the AutoZoning 
   command.Run(image); 
 
   for (int i = 0; i < command.Zones.Count; i++) 
   { 
      MessageBox.Show("Location :" + command.Zones[i].Bounds.ToString() + 
                      "\n" + "Type :" + command.Zones[i].Type.ToString()); 
   } 
} 
 
static class LEAD_VARS 
{ 
public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; 
}

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Core; 
 
       
public async Task AutoZoningCommandExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
   string srcFileName = @"Assets\OCR1.TIF"; 
   StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(srcFileName); 
   RasterImage image = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile)); 
 
   // Prepare the command 
   AutoZoningCommand command = new AutoZoningCommand(); 
   command.Options = AutoZoningOptions.DontAllowOverlap     | 
                     AutoZoningOptions.DetectAccurateZones  |  
                     AutoZoningOptions.DetectAll            | 
                     AutoZoningOptions.UseMultiThreading;  
 
   //Apply the AutoZoning 
   command.Run(image); 
 
   for (int i = 0; i < command.Zones.Count; i++) 
   { 
      String str = String.Format("Location : [Left={0}, Top={1}, Width={2}, Height={3}]\nType : {4}",  
         command.Zones[i].Bounds.X,  
         command.Zones[i].Bounds.Y,  
         command.Zones[i].Bounds.Width,  
         command.Zones[i].Bounds.Height, 
         command.Zones[i].Type.ToString()); 
      Debug.WriteLine(str); 
   } 
}

Requirements

Target Platforms

See Also

Reference

AutoZoningCommand Members

Leadtools.ImageProcessing.Core Namespace

AutoZoningOptions