SetCharacterValue Method

Summary

Sets the value of a character setting.

Syntax

C++/CLI

Java

Python

public void SetCharacterValue( 
   string settingName, 
   char value 
)

public void setCharacterValue( 
   String settingName,  
   char value 
)

void SetCharacterValue(  
   String^ settingName, 
   char value 
)

def SetCharacterValue(self,settingName,value):

Parameters

settingName
Unique setting name. If the IOcrEngine does not support the setting with the unique name settingName, an exception will be thrown. You can check which settings the engine supports by using GetSettingNames or IsSettingNameSupported.

value
New setting value.

Remarks

The settingName setting must be a "character" type setting, otherwise; this method will throw an exception. To get the type of a setting along with other information such as its friendly name and range use the GetSettingDescriptor method.

To get the value of a character setting, use GetCharacterValue.

You can also set the value of any setting from a string (where the string will be converted to a compatible type) using SetValue. To get the value of any setting as a string, use GetValue Note that settings of type OcrSettingValueType.BeginCategory and OcrSettingValueType.EndCategory have no values and will throw an exception if you try to get or set their values.

IOcrEngine is a wrapper for different OCR engines. These engines contain specific additional features and functionalities that can be queried and updated using the IOcrSettingManager interface.

You can use the different methods of the IOcrSettingManager interface to get and set the engine-specific settings. Each setting has a unique name (a string value). You can get all the settings available to the current OCR engine through the GetSettingNames method. The GetSettingDescriptor method returns a description of the setting (its type, friendly name and value range), you can then use the various setting get and set methods to query and change the value of a certain setting. For example, if the setting type is OcrSettingValueType.Integer, you can use the GetIntegerValue to get the current value of the setting and the SetIntegerValue to change its value. Refer to IOcrSettingManager for a complete example.

For a list of supported engine-specific settings and their meanings, refer to OCR engine-specific Settings.

Example

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Ocr; 
using Leadtools.Document.Writer; 
 
public void OcrSettingManagerExample() 
{ 
   // Create an instance of the engine 
   using (IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.LEAD)) 
   { 
      // Start the engine using default parameters 
      ocrEngine.Startup(null, null, null, LEAD_VARS.OcrLEADRuntimeDir); 
 
      IOcrSettingManager settingManager = ocrEngine.SettingManager; 
 
      // Dump all the settings supported by this engine to a text file on disk 
      DumpAllSettings(settingManager); 
 
      // Image file to OCR 
      string tifFileName = Path.Combine(LEAD_VARS.ImagesDir, "Ocr1.tif"); 
 
      // File formats to save 
      DocumentFormat[] formats = { DocumentFormat.Text, DocumentFormat.Pdf }; 
 
      foreach (DocumentFormat format in formats) 
      { 
         // Generate the output file name 
         string outFileName = Path.ChangeExtension(tifFileName, DocumentWriter.GetFormatFileExtension(format)); 
 
         Console.WriteLine("Format: {0}\nOutput file: {1}", format, outFileName); 
 
         int detectFontStyles = 0; 
         bool recognizeFontAttributes = false; 
 
         if (format == DocumentFormat.Text) 
         { 
            // This is 'text' format, we dont need to recognize fonts attributes such as bold and italic 
            // This will make the recognition process faster 
 
            Console.WriteLine("Turning off font attributes"); 
 
            // Save the old settings 
            detectFontStyles = settingManager.GetEnumValue("Recognition.Fonts.DetectFontStyles"); 
            recognizeFontAttributes = settingManager.GetBooleanValue("Recognition.Fonts.RecognizeFontAttributes"); 
 
            // Turn them off now 
            settingManager.SetEnumValue("Recognition.Fonts.DetectFontStyles", "None"); 
            settingManager.SetBooleanValue("Recognition.Fonts.RecognizeFontAttributes", false); 
         } 
 
         // Show the settings we are using 
         Console.WriteLine("Recognizing using these font attributes settings:"); 
         Console.WriteLine("Recognition.Fonts.DetectFontStyles: {0}", settingManager.GetEnumValueAsString("Recognition.Fonts.DetectFontStyles")); 
         Console.WriteLine("Recognition.Fonts.RecognizeFontAttributes: {0}", settingManager.GetBooleanValue("Recognition.Fonts.RecognizeFontAttributes")); 
 
 
         // Recognize and save the file to the output format 
         using (IOcrDocument ocrDocument = ocrEngine.DocumentManager.CreateDocument()) 
         { 
            // Add a page to the document 
            IOcrPage ocrPage = ocrDocument.Pages.AddPage(tifFileName, 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 
            ocrDocument.Save(outFileName, format, null); 
         } 
 
         // Re-set the original settings 
         if (format == DocumentFormat.Text) 
         { 
            Console.WriteLine("Resetting original settings"); 
            settingManager.SetEnumValue("Recognition.Fonts.DetectFontStyles", detectFontStyles); 
            settingManager.SetBooleanValue("Recognition.Fonts.RecognizeFontAttributes", recognizeFontAttributes); 
         } 
      } 
 
      // Shutdown the engine 
      // Note: calling Dispose will also automatically shutdown the engine if it has been started 
      ocrEngine.Shutdown(); 
   } 
} 
 
private static void DumpAllSettings(IOcrSettingManager settingManager) 
{ 
   // Write all the settings into a disk file 
   string settingsFileName = Path.Combine(LEAD_VARS.ImagesDir, "Settings.txt"); 
   using (StreamWriter writer = File.CreateText(settingsFileName)) 
   { 
      writer.WriteLine("Settings"); 
      string[] settingNames = settingManager.GetSettingNames(); 
 
      foreach (string settingName in settingNames) 
      { 
         IOcrSettingDescriptor sd = settingManager.GetSettingDescriptor(settingName); 
 
         writer.WriteLine("  Name:           {0}", sd.Name); 
         writer.WriteLine("  ValueType:      {0}", sd.ValueType); 
         writer.WriteLine("  FriendlyName:   {0}", sd.FriendlyName); 
 
         switch (sd.ValueType) 
         { 
            case OcrSettingValueType.BeginCategory: 
               writer.WriteLine("-------------------------------------"); 
               break; 
 
            case OcrSettingValueType.Integer: 
               writer.WriteLine("    Units: {0}", sd.Units); 
               writer.WriteLine("    IntegerMinimumValue: {0}", sd.IntegerMinimumValue); 
               writer.WriteLine("    IntegerMaximumValue: {0}", sd.IntegerMaximumValue); 
               break; 
 
            case OcrSettingValueType.Enum: 
               writer.WriteLine("    EnumIsFlags: {0}", sd.EnumIsFlags); 
               writer.WriteLine("    EnumMemberFriendlyNames"); 
               { 
                  int[] values = sd.GetEnumMemberValues(); 
                  string[] names = sd.GetEnumMemberFriendlyNames(); 
                  for (int i = 0; i < values.Length; i++) 
                  { 
                     writer.WriteLine("      {0} : {1}", names[i], values[i]); 
                  } 
               } 
               break; 
 
            case OcrSettingValueType.Double: 
               writer.WriteLine("    Units: {0}", sd.Units); 
               writer.WriteLine("    DoubleMinimumValue: {0}", sd.DoubleMinimumValue); 
               writer.WriteLine("    DoubleMaximumValue: {0}", sd.DoubleMaximumValue); 
               break; 
 
            case OcrSettingValueType.Boolean: 
               break; 
 
            case OcrSettingValueType.Character: 
               break; 
 
            case OcrSettingValueType.String: 
               writer.WriteLine("    StringMaximumLength:   {0}", sd.StringMaximumLength); 
               writer.WriteLine("    StringNullAllowed:     {0}", sd.StringNullAllowed); 
               break; 
 
            case OcrSettingValueType.Rectangle: 
               break; 
 
            case OcrSettingValueType.EndCategory: 
               break; 
 
            default: 
               break; 
         } 
      } 
   } 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
   public const string OcrLEADRuntimeDir = @"C:\LEADTOOLS23\Bin\Common\OcrLEADRuntime"; 
}