Migrating from AWS Textract to IronOCR

// OmniPage: Ceremony required on EVERY entry point — init, process, shutdown
using var engine = new OmniPageEngine();
engine.SetLicenseFile(@"C:\Program Files\OmniPage\license.lic"); // File must exist here
engine.Initialize();   // Network call to license server — can fail for license reasons, not OCR reasons

var document = engine.CreateDocument();
document.AddPage("invoice.jpg");
document.Recognize(new RecognitionSettings { Language = "English" });
string text = document.GetText();
document.Dispose();    // Must not be skipped
engine.Shutdown();     // Must not be skipped — omitting this locks a floating seat

Imports OmniPage

' OmniPage: Ceremony required on EVERY entry point — init, process, shutdown
Using engine As New OmniPageEngine()
    engine.SetLicenseFile("C:\Program Files\OmniPage\license.lic") ' File must exist here
    engine.Initialize()   ' Network call to license server — can fail for license reasons, not OCR reasons

    Dim document = engine.CreateDocument()
    document.AddPage("invoice.jpg")
    document.Recognize(New RecognitionSettings With {.Language = "English"})
    Dim text As String = document.GetText()
    document.Dispose()    ' Must not be skipped
    engine.Shutdown()     ' Must not be skipped — omitting this locks a floating seat
End Using

// IronOCR: One NuGet package, one line at startup, one call to read
IronOcr.License.LicenseKey = "YOUR-LICENSE-KEY"; // At app startup — once, ever
var text = new IronTesseract().Read("invoice.jpg").Text;

Imports IronOcr

' IronOCR: One NuGet package, one line at startup, one call to read
IronOcr.License.LicenseKey = "YOUR-LICENSE-KEY" ' At app startup — once, ever
Dim text = New IronTesseract().Read("invoice.jpg").Text

// Before (Kofax OmniPage)
using Kofax.OmniPage.CSDK;
using Kofax.OmniPageCSDK;
using CSDK;

// After (IronOCR)
using IronOcr;

Imports IronOcr

IronOcr.License.LicenseKey = "YOUR-LICENSE-KEY";

IronOcr.License.LicenseKey = "YOUR-LICENSE-KEY"

// OmniPage: try/finally required everywhere to protect license seat release
public string ProcessInvoice(string imagePath)
{
    var engine = new OmniPageEngine();
    engine.SetLicenseFile(@"C:\Program Files\OmniPage\license.lic");

    try
    {
        engine.Initialize(); // Contacts license server — failure here locks nothing
        var document = engine.CreateDocument();

        try
        {
            document.AddPage(imagePath);
            document.Recognize(new RecognitionSettings { Language = "English" });
            return document.GetText();
        }
        catch (RecognitionException ex)
        {
            // Log, rethrow — but Shutdown must still be called
            throw new OcrProcessingException("Recognition failed", ex);
        }
        finally
        {
            document.Dispose(); // Inner finally: release document
        }
    }
    catch (LicenseValidationException ex)
    {
        throw new OcrProcessingException("License validation failed", ex);
    }
    finally
    {
        engine.Shutdown(); // Outer finally: release license seat — MUST execute
    }
}

Imports System

' OmniPage: try/finally required everywhere to protect license seat release
Public Function ProcessInvoice(imagePath As String) As String
    Dim engine As New OmniPageEngine()
    engine.SetLicenseFile("C:\Program Files\OmniPage\license.lic")

    Try
        engine.Initialize() ' Contacts license server — failure here locks nothing
        Dim document = engine.CreateDocument()

        Try
            document.AddPage(imagePath)
            document.Recognize(New RecognitionSettings With {.Language = "English"})
            Return document.GetText()
        Catch ex As RecognitionException
            ' Log, rethrow — but Shutdown must still be called
            Throw New OcrProcessingException("Recognition failed", ex)
        Finally
            document.Dispose() ' Inner finally: release document
        End Try
    Catch ex As LicenseValidationException
        Throw New OcrProcessingException("License validation failed", ex)
    Finally
        engine.Shutdown() ' Outer finally: release license seat — MUST execute
    End Try
End Function

// IronOCR: なし license seat to release, no engine to shut down
public string ProcessInvoice(string imagePath)
{
    using var input = new OcrInput();
    input.LoadImage(imagePath);

    var ocr = new IronTesseract();
    var result = ocr.Read(input);
    return result.Text;
    // OcrInput disposal is automatic — no license implications on any code path
}

Imports IronOcr

Public Function ProcessInvoice(imagePath As String) As String
    Using input As New OcrInput()
        input.LoadImage(imagePath)

        Dim ocr As New IronTesseract()
        Dim result = ocr.Read(input)
        Return result.Text
    End Using
End Function

// OmniPage: Zone-based form extraction with template management
public Dictionary<string, string> ExtractInvoiceFields(string invoicePath)
{
    using var engine = new OmniPageEngine();
    engine.SetLicenseFile(licensePath);
    engine.Initialize();

    // Define zones per document template
    var zones = new List<FormZone>
    {
        new FormZone { Name = "InvoiceNumber", Type = "OCR",
            X = 520, Y = 80, Width = 200, Height = 30 },
        new FormZone { Name = "InvoiceDate",   Type = "OCR",
            X = 520, Y = 120, Width = 200, Height = 30 },
        new FormZone { Name = "TotalAmount",   Type = "OCR",
            X = 520, Y = 580, Width = 200, Height = 30 },
        new FormZone { Name = "VendorName",    Type = "OCR",
            X = 50,  Y = 80,  Width = 300, Height = 40 }
    };

    var template = new FormTemplate { Name = "StandardInvoice", Zones = zones };
    var settings = new RecognitionSettings { Language = "English" };

    var document = engine.CreateDocument();
    document.AddPage(invoicePath);
    document.ApplyTemplate(template);
    document.Recognize(settings);

    var fields = new Dictionary<string, string>();
    foreach (var zone in zones)
        fields[zone.Name] = document.GetZoneText(zone.Name);

    document.Dispose();
    engine.Shutdown();
    return fields;
}

Imports System
Imports System.Collections.Generic

' OmniPage: Zone-based form extraction with template management
Public Function ExtractInvoiceFields(invoicePath As String) As Dictionary(Of String, String)
    Using engine As New OmniPageEngine()
        engine.SetLicenseFile(licensePath)
        engine.Initialize()

        ' Define zones per document template
        Dim zones As New List(Of FormZone) From {
            New FormZone With {.Name = "InvoiceNumber", .Type = "OCR", .X = 520, .Y = 80, .Width = 200, .Height = 30},
            New FormZone With {.Name = "InvoiceDate", .Type = "OCR", .X = 520, .Y = 120, .Width = 200, .Height = 30},
            New FormZone With {.Name = "TotalAmount", .Type = "OCR", .X = 520, .Y = 580, .Width = 200, .Height = 30},
            New FormZone With {.Name = "VendorName", .Type = "OCR", .X = 50, .Y = 80, .Width = 300, .Height = 40}
        }

        Dim template As New FormTemplate With {.Name = "StandardInvoice", .Zones = zones}
        Dim settings As New RecognitionSettings With {.Language = "English"}

        Dim document = engine.CreateDocument()
        document.AddPage(invoicePath)
        document.ApplyTemplate(template)
        document.Recognize(settings)

        Dim fields As New Dictionary(Of String, String)()
        For Each zone In zones
            fields(zone.Name) = document.GetZoneText(zone.Name)
        Next

        document.Dispose()
        engine.Shutdown()
        Return fields
    End Using
End Function

// IronOCR: CropRectangle targets specific regions — no template management
public Dictionary<string, string> ExtractInvoiceFields(string invoicePath)
{
    var fields = new Dictionary<string, string>();
    var ocr = new IronTesseract();

    // Extract each field by reading only the target region
    var fieldRegions = new Dictionary<string, CropRectangle>
    {
        ["InvoiceNumber"] = new CropRectangle(520, 80,  200, 30),
        ["InvoiceDate"]   = new CropRectangle(520, 120, 200, 30),
        ["TotalAmount"]   = new CropRectangle(520, 580, 200, 30),
        ["VendorName"]    = new CropRectangle(50,  80,  300, 40)
    };

    foreach (var (fieldName, region) in fieldRegions)
    {
        using var input = new OcrInput();
        input.LoadImage(invoicePath, region);
        fields[fieldName] = ocr.Read(input).Text.Trim();
    }

    return fields;
}

Imports System.Collections.Generic

' IronOCR: CropRectangle targets specific regions — no template management
Public Function ExtractInvoiceFields(invoicePath As String) As Dictionary(Of String, String)
    Dim fields As New Dictionary(Of String, String)()
    Dim ocr As New IronTesseract()

    ' Extract each field by reading only the target region
    Dim fieldRegions As New Dictionary(Of String, CropRectangle) From {
        {"InvoiceNumber", New CropRectangle(520, 80, 200, 30)},
        {"InvoiceDate", New CropRectangle(520, 120, 200, 30)},
        {"TotalAmount", New CropRectangle(520, 580, 200, 30)},
        {"VendorName", New CropRectangle(50, 80, 300, 40)}
    }

    For Each kvp In fieldRegions
        Dim fieldName = kvp.Key
        Dim region = kvp.Value
        Using input As New OcrInput()
            input.LoadImage(invoicePath, region)
            fields(fieldName) = ocr.Read(input).Text.Trim()
        End Using
    Next

    Return fields
End Function

// OmniPage: Structured output requires format configuration and file export
public void ExtractStructuredContent(string imagePath, string outputDir)
{
    using var engine = new OmniPageEngine();
    engine.SetLicenseFile(licensePath);
    engine.Initialize();

    var settings = new RecognitionSettings { Language = "English" };
    var document = engine.CreateDocument();
    document.AddPage(imagePath);
    document.Recognize(settings);

    // Word-level coordinates through result iterator
    var iterator = document.GetResultIterator(ResultIteratorLevel.Word);
    while (iterator.MoveNext())
    {
        string word = iterator.GetText();
        var bounds = iterator.GetBoundingBox();
        double confidence = iterator.GetConfidence();
        Console.WriteLine($"Word: {word} at ({bounds.X},{bounds.Y}) conf:{confidence:F1}%");
    }

    // Structured export requires separate output format configuration
    var outputSettings = new OutputSettings
    {
        Format = OutputFormat.XML,
        IncludeCoordinates = true,
        IncludeConfidence = true
    };
    document.SaveAs(Path.Combine(outputDir, "output.xml"), outputSettings);

    document.Dispose();
    engine.Shutdown();
}

Imports System
Imports System.IO

Public Sub ExtractStructuredContent(imagePath As String, outputDir As String)
    Using engine As New OmniPageEngine()
        engine.SetLicenseFile(licensePath)
        engine.Initialize()

        Dim settings As New RecognitionSettings With {.Language = "English"}
        Dim document = engine.CreateDocument()
        document.AddPage(imagePath)
        document.Recognize(settings)

        ' Word-level coordinates through result iterator
        Dim iterator = document.GetResultIterator(ResultIteratorLevel.Word)
        While iterator.MoveNext()
            Dim word As String = iterator.GetText()
            Dim bounds = iterator.GetBoundingBox()
            Dim confidence As Double = iterator.GetConfidence()
            Console.WriteLine($"Word: {word} at ({bounds.X},{bounds.Y}) conf:{confidence:F1}%")
        End While

        ' Structured export requires separate output format configuration
        Dim outputSettings As New OutputSettings With {
            .Format = OutputFormat.XML,
            .IncludeCoordinates = True,
            .IncludeConfidence = True
        }
        document.SaveAs(Path.Combine(outputDir, "output.xml"), outputSettings)

        document.Dispose()
        engine.Shutdown()
    End Using
End Sub

// IronOCR: Structured data directly on OcrResult — no export step
public void ExtractStructuredContent(string imagePath)
{
    var result = new IronTesseract().Read(imagePath);

    Console.WriteLine($"Confidence: {result.Confidence:F1}%");
    Console.WriteLine($"Pages: {result.Pages.Length}");

    foreach (var page in result.Pages)
    {
        foreach (var paragraph in page.Paragraphs)
        {
            Console.WriteLine($"[Paragraph at ({paragraph.X},{paragraph.Y})]");
            Console.WriteLine(paragraph.Text);

            foreach (var word in paragraph.Words)
            {
                // Per-word confidence and coordinates — no iterator needed
                Console.WriteLine(
                    $"  Word: '{word.Text}' " +
                    $"at ({word.X},{word.Y}) " +
                    $"conf: {word.Confidence:F1}%");
            }
        }
    }
}

Public Sub ExtractStructuredContent(imagePath As String)
    Dim result = New IronTesseract().Read(imagePath)

    Console.WriteLine($"Confidence: {result.Confidence:F1}%")
    Console.WriteLine($"Pages: {result.Pages.Length}")

    For Each page In result.Pages
        For Each paragraph In page.Paragraphs
            Console.WriteLine($"[Paragraph at ({paragraph.X},{paragraph.Y})]")
            Console.WriteLine(paragraph.Text)

            For Each word In paragraph.Words
                ' Per-word confidence and coordinates — no iterator needed
                Console.WriteLine(
                    $"  Word: '{word.Text}' " &
                    $"at ({word.X},{word.Y}) " &
                    $"conf: {word.Confidence:F1}%")
            Next
        Next
    Next
End Sub

// OmniPage: Page-by-page TIFF extraction with per-page lifecycle
public List<string> ExtractFromMultiPageTiff(string tiffPath)
{
    var pageTexts = new List<string>();

    using var engine = new OmniPageEngine();
    engine.SetLicenseFile(licensePath);
    engine.Initialize();

    // Open TIFF and iterate frames
    var tiffContainer = engine.OpenTiff(tiffPath);
    int pageCount = tiffContainer.GetPageCount();

    var settings = new RecognitionSettings { Language = "English" };

    for (int i = 0; i < pageCount; i++)
    {
        var page = tiffContainer.GetPage(i); // Extract frame
        var document = engine.CreateDocument();

        try
        {
            document.AddPage(page);
            document.Recognize(settings);
            pageTexts.Add(document.GetText());
        }
        finally
        {
            document.Dispose(); // Dispose per page to manage memory
        }
    }

    tiffContainer.Dispose();
    engine.Shutdown();
    return pageTexts;
}

Imports System.Collections.Generic

' OmniPage: Page-by-page TIFF extraction with per-page lifecycle
Public Function ExtractFromMultiPageTiff(tiffPath As String) As List(Of String)
    Dim pageTexts As New List(Of String)()

    Using engine As New OmniPageEngine()
        engine.SetLicenseFile(licensePath)
        engine.Initialize()

        ' Open TIFF and iterate frames
        Dim tiffContainer = engine.OpenTiff(tiffPath)
        Dim pageCount As Integer = tiffContainer.GetPageCount()

        Dim settings As New RecognitionSettings With {.Language = "English"}

        For i As Integer = 0 To pageCount - 1
            Dim page = tiffContainer.GetPage(i) ' Extract frame
            Dim document = engine.CreateDocument()

            Try
                document.AddPage(page)
                document.Recognize(settings)
                pageTexts.Add(document.GetText())
            Finally
                document.Dispose() ' Dispose per page to manage memory
            End Try
        Next

        tiffContainer.Dispose()
        engine.Shutdown()
    End Using

    Return pageTexts
End Function

// IronOCR: Multi-frame TIFF loaded in one call — all pages in one result
public List<string> ExtractFromMultiPageTiff(string tiffPath)
{
    using var input = new OcrInput();
    input.LoadImageFrames(tiffPath); // All frames loaded automatically

    var result = new IronTesseract().Read(input);

    // Each TIFF frame becomes a page in the result
    return result.Pages.Select(page => page.Text).ToList();
}

Imports System.Collections.Generic
Imports IronOcr

' IronOCR: Multi-frame TIFF loaded in one call — all pages in one result
Public Function ExtractFromMultiPageTiff(tiffPath As String) As List(Of String)
    Using input As New OcrInput()
        input.LoadImageFrames(tiffPath) ' All frames loaded automatically

        Dim result = New IronTesseract().Read(input)

        ' Each TIFF frame becomes a page in the result
        Return result.Pages.Select(Function(page) page.Text).ToList()
    End Using
End Function

// OmniPage: Shared engine with locking to serialize document operations
public ConcurrentDictionary<string, string> ProcessBatchWithEngine(
    string[] imagePaths, string licensePath)
{
    var results = new ConcurrentDictionary<string, string>();
    var engineLock = new object();

    // One engine — document operations must be serialized
    using var engine = new OmniPageEngine();
    engine.SetLicenseFile(licensePath);
    engine.Initialize();

    var settings = new RecognitionSettings { Language = "English" };

    Parallel.ForEach(imagePaths, imagePath =>
    {
        lock (engineLock) // Serialize: one recognition at a time
        {
            var document = engine.CreateDocument();
            try
            {
                document.AddPage(imagePath);
                document.Recognize(settings);
                results[imagePath] = document.GetText();
            }
            finally
            {
                document.Dispose();
            }
        }
    });

    engine.Shutdown();
    return results;
}

Imports System.Collections.Concurrent
Imports System.Threading.Tasks

' OmniPage: Shared engine with locking to serialize document operations
Public Function ProcessBatchWithEngine(imagePaths As String(), licensePath As String) As ConcurrentDictionary(Of String, String)
    Dim results As New ConcurrentDictionary(Of String, String)()
    Dim engineLock As New Object()

    ' One engine — document operations must be serialized
    Using engine As New OmniPageEngine()
        engine.SetLicenseFile(licensePath)
        engine.Initialize()

        Dim settings As New RecognitionSettings With {.Language = "English"}

        Parallel.ForEach(imagePaths, Sub(imagePath)
                                        SyncLock engineLock ' Serialize: one recognition at a time
                                            Dim document = engine.CreateDocument()
                                            Try
                                                document.AddPage(imagePath)
                                                document.Recognize(settings)
                                                results(imagePath) = document.GetText()
                                            Finally
                                                document.Dispose()
                                            End Try
                                        End SyncLock
                                    End Sub)
        engine.Shutdown()
    End Using

    Return results
End Function

// IronOCR: One IronTesseract per thread — no locking, genuine parallelism
public ConcurrentDictionary<string, string> ProcessBatchInParallel(string[] imagePaths)
{
    var results = new ConcurrentDictionary<string, string>();

    Parallel.ForEach(imagePaths, imagePath =>
    {
        // Each thread creates its own instance — no shared state, no locks
        var ocr = new IronTesseract();
        using var input = new OcrInput();
        input.LoadImage(imagePath);

        var result = ocr.Read(input);
        results[imagePath] = result.Text;
    });

    return results;
}

Imports System.Collections.Concurrent
Imports System.Threading.Tasks
Imports IronOcr

' IronOCR: One IronTesseract per thread — no locking, genuine parallelism
Public Function ProcessBatchInParallel(imagePaths As String()) As ConcurrentDictionary(Of String, String)
    Dim results As New ConcurrentDictionary(Of String, String)()

    Parallel.ForEach(imagePaths, Sub(imagePath)
        ' Each thread creates its own instance — no shared state, no locks
        Dim ocr As New IronTesseract()
        Using input As New OcrInput()
            input.LoadImage(imagePath)

            Dim result = ocr.Read(input)
            results(imagePath) = result.Text
        End Using
    End Sub)

    Return results
End Function

// OmniPage: Searchable PDF requires OutputSettings configuration before save
public void ConvertArchiveToSearchable(string[] scannedPdfPaths, string outputDirectory)
{
    using var engine = new OmniPageEngine();
    engine.SetLicenseFile(licensePath);
    engine.Initialize();

    var recognitionSettings = new RecognitionSettings
    {
        Language = "English",
        AccuracyMode = "Maximum",
        PreserveLayout = true
    };

    var outputSettings = new OutputSettings
    {
        Format = OutputFormat.SearchablePDF,
        Compression = PDFCompression.Standard,
        ImageQuality = 85,
        EmbedFonts = true
    };

    foreach (var pdfPath in scannedPdfPaths)
    {
        var document = engine.OpenPDF(pdfPath);
        document.RecognizeAll(recognitionSettings);

        string outputPath = Path.Combine(
            outputDirectory,
            Path.GetFileNameWithoutExtension(pdfPath) + "_searchable.pdf");

        document.SaveAs(outputPath, outputSettings);
        document.Dispose();
    }

    engine.Shutdown();
}

Imports System.IO

' OmniPage: Searchable PDF requires OutputSettings configuration before save
Public Sub ConvertArchiveToSearchable(scannedPdfPaths As String(), outputDirectory As String)
    Using engine As New OmniPageEngine()
        engine.SetLicenseFile(licensePath)
        engine.Initialize()

        Dim recognitionSettings As New RecognitionSettings With {
            .Language = "English",
            .AccuracyMode = "Maximum",
            .PreserveLayout = True
        }

        Dim outputSettings As New OutputSettings With {
            .Format = OutputFormat.SearchablePDF,
            .Compression = PDFCompression.Standard,
            .ImageQuality = 85,
            .EmbedFonts = True
        }

        For Each pdfPath As String In scannedPdfPaths
            Dim document = engine.OpenPDF(pdfPath)
            document.RecognizeAll(recognitionSettings)

            Dim outputPath As String = Path.Combine(outputDirectory, Path.GetFileNameWithoutExtension(pdfPath) & "_searchable.pdf")

            document.SaveAs(outputPath, outputSettings)
            document.Dispose()
        Next
    End Using

    engine.Shutdown()
End Sub

// IronOCR: Searchable PDF output is one method call on the result
public void ConvertArchiveToSearchable(string[] scannedPdfPaths, string outputDirectory)
{
    var ocr = new IronTesseract();

    foreach (var pdfPath in scannedPdfPaths)
    {
        using var input = new OcrInput();
        input.LoadPdf(pdfPath); // All pages loaded automatically

        var result = ocr.Read(input);

        string outputPath = Path.Combine(
            outputDirectory,
            Path.GetFileNameWithoutExtension(pdfPath) + "_searchable.pdf");

        result.SaveAsSearchablePdf(outputPath);
        Console.WriteLine($"Processed: {Path.GetFileName(pdfPath)} ({result.Pages.Length} pages)");
    }
}

Imports System.IO
Imports IronOcr

Public Sub ConvertArchiveToSearchable(scannedPdfPaths As String(), outputDirectory As String)
    Dim ocr As New IronTesseract()

    For Each pdfPath As String In scannedPdfPaths
        Using input As New OcrInput()
            input.LoadPdf(pdfPath) ' All pages loaded automatically

            Dim result = ocr.Read(input)

            Dim outputPath As String = Path.Combine(outputDirectory, Path.GetFileNameWithoutExtension(pdfPath) & "_searchable.pdf")

            result.SaveAsSearchablePdf(outputPath)
            Console.WriteLine($"Processed: {Path.GetFileName(pdfPath)} ({result.Pages.Length} pages)")
        End Using
    Next
End Sub

// At application startup — reads IRONOCR_LICENSE_KEY from environment
IronOcr.License.LicenseKey = Environment.GetEnvironmentVariable("IRONOCR_LICENSE_KEY")
    ?? throw new InvalidOperationException("IronOCR license key not configured.");

Imports System

' At application startup — reads IRONOCR_LICENSE_KEY from environment
IronOcr.License.LicenseKey = If(Environment.GetEnvironmentVariable("IRONOCR_LICENSE_KEY"), Throw New InvalidOperationException("IronOCR license key not configured."))

// IronOCR: Process crash has no license implications whatsoever
// Start processing immediately after any failure
IronOcr.License.LicenseKey = "YOUR-LICENSE-KEY";
var result = new IronTesseract().Read("document.jpg"); // なし seat to check out

' IronOCR: Process crash has no license implications whatsoever
' Start processing immediately after any failure
IronOcr.License.LicenseKey = "YOUR-LICENSE-KEY"
Dim result = New IronTesseract().Read("document.jpg") ' なし seat to check out

// Identical startup code on any hardware topology
IronOcr.License.LicenseKey = "YOUR-LICENSE-KEY";
bool valid = IronOcr.License.IsLicensed; // Verify without a network call

' Identical startup code on any hardware topology
IronOcr.License.LicenseKey = "YOUR-LICENSE-KEY"
Dim valid As Boolean = IronOcr.License.IsLicensed ' Verify without a network call

// OmniPage settings object → IronOCR method calls on OcrInput
var ocr = new IronTesseract();
ocr.Language = OcrLanguage.English;              // RecognitionSettings.Language
// ocr.Configuration.TesseractVersion = ...     // Engine version already optimized

using var input = new OcrInput();
input.LoadImage(imagePath);
input.Deskew();                                  // settings.DeskewImage = true
input.DeNoise();                                 // settings.DespeckleLevel = 2
input.Contrast();                                // settings.ContrastEnhancement = true

var result = ocr.Read(input);

Imports IronOcr

Dim ocr As New IronTesseract()
ocr.Language = OcrLanguage.English

Using input As New OcrInput()
    input.LoadImage(imagePath)
    input.Deskew()
    input.DeNoise()
    input.Contrast()

    Dim result = ocr.Read(input)
End Using

// Convert OmniPage zone definition to IronOCR CropRectangle
// OmniPage zone: Name="TotalDue" X="490" Y="612" Width="180" Height="28"
// IronOCR equivalent:
var totalDueRegion = new CropRectangle(490, 612, 180, 28);

using var input = new OcrInput();
input.LoadImage(invoicePath, totalDueRegion);
string totalDue = new IronTesseract().Read(input).Text.Trim();

Imports IronOcr

' Convert OmniPage zone definition to IronOCR CropRectangle
' OmniPage zone: Name="TotalDue" X="490" Y="612" Width="180" Height="28"
' IronOCR equivalent:
Dim totalDueRegion As New CropRectangle(490, 612, 180, 28)

Using input As New OcrInput()
    input.LoadImage(invoicePath, totalDueRegion)
    Dim totalDue As String = New IronTesseract().Read(input).Text.Trim()
End Using

# Find all OmniPage namespace references
grep -r "Kofax\|OmniPage\|CSDK" --include="*.cs" --include="*.csproj" .

# Find engine lifecycle calls
grep -r "Initialize\|Shutdown\|SetLicenseFile" --include="*.cs" .

# Find document and zone creation patterns
grep -r "CreateDocument\|AddPage\|FormZone\|RecognitionSettings\|PreprocessingSettings" --include="*.cs" .

# Find output format configuration
grep -r "OutputSettings\|OutputFormat\|SaveAs\|GetText" --include="*.cs" .

# Find license file path references
grep -r "\.lic\|license\.lic\|licensePath" --include="*.cs" --include="*.config" --include="*.json" .