OcrStatistic Structure

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Visual Basic
WinRT C#
Java
Objective-C
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[SerializableAttribute()]
public struct OcrStatistic : System.ValueType

'Declaration

<SerializableAttribute()>
Public Structure OcrStatistic 
   Inherits System.ValueType

'Usage

Dim instance As OcrStatistic

[SerializableAttribute()]
public class OcrStatistic

@interface LTOcrStatistic : NSObject

public class OcrStatistic

JAVASCRIPT_NOSTRUCTS

[SerializableAttribute()]
public value class OcrStatistic : public System.ValueType

This structure contains the accuracy and timing data of the latest successful recognition process.

To obtain the statistic, use GetLastStatistic.

Note that the time spent for the text post-processing can be calculated as follows: PostProcessingTime = statistic.ReadingTime - statistic.RecognitionTime.

Note: Only the following members are available for the LEADTOOLS OCR Advantage Engine

This example will show the statistics of the last recognition operation on a page.

C#
Visual Basic
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

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Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.Forms.Ocr
Imports Leadtools.Forms.DocumentWriters

<TestMethod>
Public Sub OcrStatisticExample()
   ' Create an instance of the engine
   Using ocrEngine As IOcrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Advantage, False)
      ' Start the engine using default parameters
      ocrEngine.Startup(Nothing, Nothing, Nothing, LEAD_VARS.OcrAdvantageRuntimeDir)
      Dim tifFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Ocr1.tif")
      Dim pdfFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Ocr1.pdf")

      ' Create an OCR page
      Using ocrPage As IOcrPage = ocrEngine.CreatePage(ocrEngine.RasterCodecsInstance.Load(tifFileName, 1), OcrImageSharingMode.AutoDispose)
         ' Process the page
         ocrPage.AutoPreprocess(OcrAutoPreprocessPageCommand.Deskew, Nothing)

         ' Recognize the page
         ' Note, Recognize can be called without calling AutoZone or manually adding zones. The engine will
         ' check and automatically auto-zones the page
         ocrPage.Recognize(Nothing)

         ' Show the statistic about the last recognize operation
         Dim statistic As OcrStatistic = ocrEngine.GetLastStatistic()
         Console.WriteLine("Recognized characters: {0}", statistic.RecognizedCharacters)
         Console.WriteLine("Recognized words: {0}", statistic.RecognizedWords)
         Console.WriteLine("Rejected characters: {0}", statistic.RejectedCharacters)
         Console.WriteLine("Corrected words: {0}", statistic.CorrectedWords)
         Console.WriteLine("Recognition time: {0} ms", statistic.RecognitionTime)
         Console.WriteLine("Reading time: {0} ms", statistic.ReadingTime)
         Console.WriteLine("Image Preprocessing time: {0} ms", statistic.ImagePreprocessingTime)
         Console.WriteLine("Decomposition time: {0} ms", statistic.DecompositionTime)
         Console.WriteLine("Post processing time: {0} ms", statistic.ReadingTime - statistic.RecognitionTime)
      End Using

      ' Shutdown the engine
      ' Note: calling Dispose will also automatically shutdown the engine if it has been started
      ocrEngine.Shutdown()
   End Using
End Sub

Public NotInheritable Class LEAD_VARS
Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
Public Const OcrAdvantageRuntimeDir As String = "C:\LEADTOOLS 19\Bin\Common\OcrAdvantageRuntime"
End Class

using Leadtools;
using Leadtools.Codecs;
using Leadtools.Forms.Ocr;
using Leadtools.Forms.DocumentWriters;

public void OcrStatisticExample()
{
   // Create an instance of the engine
   using (IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Advantage, false))
   {
      // Start the engine using default parameters
      ocrEngine.Startup(null, null, null, LEAD_VARS.OcrAdvantageRuntimeDir);
      string tifFileName = Path.Combine(LEAD_VARS.ImagesDir, "Ocr1.tif");
      string pdfFileName = Path.Combine(LEAD_VARS.ImagesDir, "Ocr1.pdf");

      // Create an OCR page
      using (IOcrPage ocrPage = ocrEngine.CreatePage(ocrEngine.RasterCodecsInstance.Load(tifFileName, 1), OcrImageSharingMode.AutoDispose))
      {
         // Process the page
         ocrPage.AutoPreprocess(OcrAutoPreprocessPageCommand.Deskew, null);

         // Recognize the page
         // Note, Recognize can be called without calling AutoZone or manually adding zones. The engine will
         // check and automatically auto-zones the page
         ocrPage.Recognize(null);

         // Show the statistic about the last recognize operation
         OcrStatistic statistic = ocrEngine.GetLastStatistic();
         Console.WriteLine("Recognized characters: {0}", statistic.RecognizedCharacters);
         Console.WriteLine("Recognized words: {0}", statistic.RecognizedWords);
         Console.WriteLine("Rejected characters: {0}", statistic.RejectedCharacters);
         Console.WriteLine("Corrected words: {0}", statistic.CorrectedWords);
         Console.WriteLine("Recognition time: {0} ms", statistic.RecognitionTime);
         Console.WriteLine("Reading time: {0} ms", statistic.ReadingTime);
         Console.WriteLine("Image Preprocessing time: {0} ms", statistic.ImagePreprocessingTime);
         Console.WriteLine("Decomposition time: {0} ms", statistic.DecompositionTime);
         Console.WriteLine("Post processing time: {0} ms", statistic.ReadingTime - statistic.RecognitionTime);
      }

      // Shutdown the engine
      // Note: calling Dispose will also automatically shutdown the engine if it has been started
      ocrEngine.Shutdown();
   }
}

static class LEAD_VARS
{
public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
public const string OcrAdvantageRuntimeDir = @"C:\LEADTOOLS 19\Bin\Common\OcrAdvantageRuntime";
}

using Leadtools;
using Leadtools.Codecs;
using Leadtools.Forms.Ocr;
using Leadtools.Forms.DocumentWriters;

      
public async Task OcrStatisticExample()
{
   // Create an instance of the engine
   IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Advantage, false);
   // Start the engine using default parameters
   ocrEngine.Startup(null, null, String.Empty, Tools.OcrEnginePath);

   string tifFileName = @"Assets\Ocr1.tif";
   string pdfFileName = "Ocr1.pdf";

   // Create an OCR document
   IOcrDocument ocrDocument = ocrEngine.DocumentManager.CreateDocument();

   // Add a page to the document
   IOcrPage ocrPage = null;
   using (RasterCodecs codecs = new RasterCodecs())
   {
      StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(tifFileName);
      using (RasterImage image = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile)))
      {
         ocrPage = ocrDocument.Pages.AddPage(image, null);
      }
   }

   // Process the page
   ocrPage.AutoPreprocess(OcrAutoPreprocessPageCommand.Deskew, null);

   // Recognize the page
   // Note, Recognize can be called without calling AutoZone or manually adding zones. The engine will
   // check and automatically auto-zones the page
   ocrPage.Recognize(null);

   // Save the document we have as PDF
   StorageFile saveFile = await Tools.AppLocalFolder.CreateFileAsync(pdfFileName, CreationCollisionOption.ReplaceExisting);
   await ocrDocument.SaveAsync(LeadStreamFactory.Create(saveFile), DocumentFormat.Pdf, null);

   // Show the statistic about the last recognize operation
   OcrStatistic statistic = ocrEngine.GetLastStatistic();
   Debug.WriteLine("Recognized characters: {0}", statistic.RecognizedCharacters);
   Debug.WriteLine("Recognized words: {0}", statistic.RecognizedWords);
   Debug.WriteLine("Rejected characters: {0}", statistic.RejectedCharacters);
   Debug.WriteLine("Corrected words: {0}", statistic.CorrectedWords);
   Debug.WriteLine("Recognition time: {0} ms", statistic.RecognitionTime);
   Debug.WriteLine("Reading time: {0} ms", statistic.ReadingTime);
   Debug.WriteLine("Image Preprocessing time: {0} ms", statistic.ImagePreprocessingTime);
   Debug.WriteLine("Decomposition time: {0} ms", statistic.DecompositionTime);
   Debug.WriteLine("Post processing time: {0} ms", statistic.ReadingTime - statistic.RecognitionTime);

   // Shutdown the engine
   ocrEngine.Shutdown();
}

Target Platforms

Reference

OcrStatistic Members
Leadtools.Forms.Ocr Namespace
IOcrEngine.GetLastStatistic
IOcrEngine.Startup
IOcrEngine.IsStarted
IOcrEngine.Shutdown
IOcrPage Interface
IOcrPage.AutoPreprocess
AutoZone Method
IOcrPage.Recognize
IOcrDocument.Save
IOcrDocument.SaveXml
OcrEngineManager Class
OcrEngineType Enumeration
Programming with LEADTOOLS .NET OCR