public interface IOcrSettingManager
Public Interface IOcrSettingManager
@interface LTOcrSettingManager : NSObject
public class OcrSettingManager
public interface class IOcrSettingManager
Access the instance of the IOcrSettingManager used by an IOcrEngine through the IOcrEngine.SettingManager property.
IOcrSettingManager allows you to do the following:
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). Get all of 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 get and set methods to query and change the values of specific settings. 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 the example below for a complete demo.
This interface also contains methods to load and save the engine state to a .NET stream or an XML file on disk. The following table lists all the states saved:
Part | Members |
---|---|
IOcrSettingManager (accessed through IOcrEngine.SettingManager | All the settings as obtained through IOcrSettingManager.GetSettingNames |
IOcrLanguageManager (accessed through IOcrEngine.LanguageManager | The value of IOcrLanguageManager.GetEnabledLanguages |
IOcrSpellCheckManager (accessed through IOcrEngine.SpellCheckManager | The values of IOcrSpellCheckManager.SpellCheckEngine and IOcrSpellCheckManager.SpellLanguage. |
IOcrDocumentManager (accessed through IOcrEngine.DocumentManager | The values of IOcrDocumentManager.EngineFormat, IOcrDocumentManager.RejectionSymbol and IOcrDocumentManager.MissingSymbol. |
IOcrZoneManager (accessed through IOcrEngine.ZoneManager | The values of IOcrZoneManager.OmrOptions.FrameDetectionMethod, IOcrZoneManager.OmrOptions.Sensitivity and the state characters of IOcrZoneManager.OmrOptions.GetStateRecognitionCharacter. |
You must call the IOcrEngine.Startup method before you can use the IOcrEngine.SettingManager property.
Note: The IOcrEngine.LanguageManager and IOcrEngine.SpellCheckManager state is also saved when the engine settings are saved. For more information, refer to IOcrSettingManager.Save.
For a list of supported engine-specific settings and their meanings, refer to OCR engine-specific Settings.
This example will start the LEADTOOLS OCR Module - LEAD Engine. Shows the values of all the settings and change a few of them.
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, false))
{
// 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:\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 OcrSettingManagerExample()
' 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 settingManager As IOcrSettingManager = ocrEngine.SettingManager
' Dump all the settings supported by this engine to a text file on disk
DumpAllSettings(settingManager)
' Image file to OCR
Dim tifFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Ocr1.tif")
' File formats to save
Dim formats As DocumentFormat() = {DocumentFormat.Text, DocumentFormat.Pdf}
For Each format As DocumentFormat In formats
' Generate the output file name
Dim outFileName As String = Path.ChangeExtension(tifFileName, DocumentWriter.GetFormatFileExtension(format))
Console.WriteLine("Format: {0}" & vbLf & "Output file: {1}", format, outFileName)
Dim detectFontStyles As Integer = 0
Dim recognizeFontAttributes As Boolean = False
If format = DocumentFormat.Text Then
' 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)
End If
' 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 ocrDocument As IOcrDocument = ocrEngine.DocumentManager.CreateDocument()
' Add a page to the document
Dim ocrPage As IOcrPage = ocrDocument.Pages.AddPage(tifFileName, 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)
' Save the document we have as PDF
ocrDocument.Save(outFileName, format, Nothing)
End Using
' Re-set the original settings
If format = DocumentFormat.Text Then
Console.WriteLine("Resetting original settings")
settingManager.SetEnumValue("Recognition.Fonts.DetectFontStyles", detectFontStyles)
settingManager.SetBooleanValue("Recognition.Fonts.RecognizeFontAttributes", recognizeFontAttributes)
End If
Next
' Shutdown the engine
' Note: calling Dispose will also automatically shutdown the engine if it has been started
ocrEngine.Shutdown()
End Using
End Sub
Private Shared Sub DumpAllSettings(settingManager As IOcrSettingManager)
' Write all the settings into a disk file
Dim settingsFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Settings.txt")
Using writer As StreamWriter = File.CreateText(settingsFileName)
writer.WriteLine("Settings")
Dim settingNames As String() = settingManager.GetSettingNames()
For Each settingName As String In settingNames
Dim sd As IOcrSettingDescriptor = settingManager.GetSettingDescriptor(settingName)
writer.WriteLine(" Name: {0}", sd.Name)
writer.WriteLine(" ValueType: {0}", sd.ValueType)
writer.WriteLine(" FriendlyName: {0}", sd.FriendlyName)
Select Case sd.ValueType
Case OcrSettingValueType.BeginCategory
writer.WriteLine("-------------------------------------")
Exit Select
Case OcrSettingValueType.[Integer]
writer.WriteLine(" Units: {0}", sd.Units)
writer.WriteLine(" IntegerMinimumValue: {0}", sd.IntegerMinimumValue)
writer.WriteLine(" IntegerMaximumValue: {0}", sd.IntegerMaximumValue)
Exit Select
Case OcrSettingValueType.[Enum]
writer.WriteLine(" EnumIsFlags: {0}", sd.EnumIsFlags)
writer.WriteLine(" EnumMemberFriendlyNames")
If True Then
Dim values As Integer() = sd.GetEnumMemberValues()
Dim names As String() = sd.GetEnumMemberFriendlyNames()
For i As Integer = 0 To values.Length - 1
writer.WriteLine(" {0} : {1}", names(i), values(i))
Next
End If
Exit Select
Case OcrSettingValueType.[Double]
writer.WriteLine(" Units: {0}", sd.Units)
writer.WriteLine(" DoubleMinimumValue: {0}", sd.DoubleMinimumValue)
writer.WriteLine(" DoubleMaximumValue: {0}", sd.DoubleMaximumValue)
Exit Select
Case OcrSettingValueType.[Boolean]
Exit Select
Case OcrSettingValueType.Character
Exit Select
Case OcrSettingValueType.[String]
writer.WriteLine(" StringMaximumLength: {0}", sd.StringMaximumLength)
writer.WriteLine(" StringNullAllowed: {0}", sd.StringNullAllowed)
Exit Select
Case OcrSettingValueType.Rectangle
Exit Select
Case OcrSettingValueType.EndCategory
Exit Select
Case Else
Exit Select
End Select
Next
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
OcrSettingValueType Enumeration
IOcrSpellCheckManager Interface
Programming with the LEADTOOLS .NET OCR
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