SauvolaBinarizeCommand Class

Summary

This function applies Sauvola binarizer to a bitmap. This class is available in the Document/Medical toolkits only.

Syntax

C++

public class SauvolaBinarizeCommand : RasterCommand

Public Class SauvolaBinarizeCommand 
   Inherits RasterCommand

public: 
   ref class SauvolaBinarizeCommand : RasterCommand

Remarks

This command applies Sauvola binarization introduced in https://www.sciencedirect.com/science/article/abs/pii/S0031320399000552.
This function is useful for improving recognition results (OCR, Barcode, OMR, ICR).
This command does not support 12-bit or 16-bit grayscale or 48-bit or 64-bit color images (Exception: Image format not recognized).

Example

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Core; 
 
public void SauvolaBinarizeCommandExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "glare.jpg")); 
   string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "BinarizedImage.bmp"); 
 
   // Prepare the command 
   SauvolaBinarizeCommand command = new SauvolaBinarizeCommand(); 
 
   command.KFactor = 0.15; 
   command.RFactor = 128; 
   command.WindowSize = 55; 
 
   command.Run(image); 
 
    // Save it to disk 
    codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS21\Resources\Images"; 
}

Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing 
Imports Leadtools.ImageProcessing.Core 
 
Public Sub SauvolaBinarizeCommandExample() 
   ' Load an image 
   Dim codecs As RasterCodecs = New RasterCodecs() 
   codecs.ThrowExceptionsOnInvalidImages = True 
 
   Dim image As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "glare.jpg")) 
   Dim destFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "BinarizedImage.bmp") 
 
   ' Prepare the command 
   Dim command As SauvolaBinarizeCommand = New SauvolaBinarizeCommand() 
 
   command.KFactor = 0.15 
   command.RFactor = 128 
   command.WindowSize = 55 
 
   command.Run(image) 
 
   ' Save it to disk 
   codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24) 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
   Public Const ImagesDir As String = "C:\LEADTOOLS21\Resources\Images" 
End Class