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OcrStatistic Structure

Summary

Represents processing statistic data.

Syntax

C#
VB
Java
Objective-C
C++
[SerializableAttribute()] 
public struct OcrStatistic 
<SerializableAttribute()> 
Public Structure OcrStatistic  
   Inherits System.ValueType 
@interface LTOcrStatistic : NSObject 
public class OcrStatistic 
[SerializableAttribute()] 
public value class OcrStatistic : public System.ValueType  

Remarks

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 Module - LEAD Engine

Example

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

C#
VB
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Ocr; 
using Leadtools.Document.Writer; 
 
public void OcrStatisticExample() 
{ 
   // Create an instance of the engine 
   using (IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.LEAD, false)) 
   { 
      // Start the engine using default parameters 
      ocrEngine.Startup(null, null, null, LEAD_VARS.OcrLEADRuntimeDir); 
 
      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 OcrLEADRuntimeDir = @"C:\LEADTOOLS 20\Bin\Common\OcrLEADRuntime"; 
} 
Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.Ocr 
Imports Leadtools.Document.Writer 
 
Public Sub OcrStatisticExample() 
   ' Create an instance of the engine 
   Using ocrEngine As IOcrEngine = OcrEngineManager.CreateEngine(OcrEngineType.LEAD, False) 
      ' Start the engine using default parameters 
      ocrEngine.Startup(Nothing, Nothing, Nothing, LEAD_VARS.OcrLEADRuntimeDir) 
 
      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 OcrLEADRuntimeDir As String = "C:\LEADTOOLS 20\Bin\Common\OcrLEADRuntime" 
End Class 

Requirements

Target Platforms

Help Version 20.0.2018.1.18
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Leadtools.Ocr Assembly