How to Use the Filter Wizard in C# for Better OCR

using IronOcr;
using System;

// Initialize the Tesseract engine
var ocr = new IronTesseract();

// 1. Pass the image path ("noise.png").
// 2. Pass an 'out' variable to store the best confidence score found.
// 3. Pass the tesseract instance to be used for testing.
string codeToRun = OcrInputFilterWizard.Run("noise.png", out double confidence, ocr);

// The 'confidence' variable is now populated with the highest score achieved.
Console.WriteLine($"Best Confidence Score: {confidence}");

// 'codeToRun' holds the exact C# code snippet that achieved this score.
// The returned string is the code you can use to filter similar images.
Console.WriteLine("Recommended Filter Code:");
Console.WriteLine(codeToRun);

Imports IronOcr
Imports System

' Initialize the Tesseract engine
Dim ocr As New IronTesseract()

' 1. Pass the image path ("noise.png").
' 2. Pass an 'out' variable to store the best confidence score found.
' 3. Pass the tesseract instance to be used for testing.
Dim confidence As Double
Dim codeToRun As String = OcrInputFilterWizard.Run("noise.png", confidence, ocr)

' The 'confidence' variable is now populated with the highest score achieved.
Console.WriteLine($"Best Confidence Score: {confidence}")

' 'codeToRun' holds the exact C# code snippet that achieved this score.
' The returned string is the code you can use to filter similar images.
Console.WriteLine("Recommended Filter Code:")
Console.WriteLine(codeToRun)

/* :path=/static-assets/ocr/content-code-examples/how-to/filter-wizard-batch.cs */
using IronOcr;
using System;
using System.IO;

// Process multiple similar images
var ocr = new IronTesseract();
string[] imageFiles = Directory.GetFiles(@"C:\Images", "*.png");

// Run Filter Wizard on first image to discover optimal settings
string optimalCode = OcrInputFilterWizard.Run(imageFiles[0], out double baselineConfidence, ocr);
Console.WriteLine($"Baseline confidence: {baselineConfidence:P2}");
Console.WriteLine($"Optimal filter sequence discovered");

// Apply discovered filters to all images
foreach (string imagePath in imageFiles)
{
    using (var input = new OcrImageInput(imagePath))
    {
        // Apply the filter sequence discovered by the wizard
        // The actual filters would be applied here based on the wizard output
        var result = ocr.Read(input);
        Console.WriteLine($"Processed: {Path.GetFileName(imagePath)} - Confidence: {result.Confidence:P2}");
    }
}

Imports IronOcr
Imports System
Imports System.IO

' Process multiple similar images
Dim ocr As New IronTesseract()
Dim imageFiles As String() = Directory.GetFiles("C:\Images", "*.png")

' Run Filter Wizard on first image to discover optimal settings
Dim baselineConfidence As Double
Dim optimalCode As String = OcrInputFilterWizard.Run(imageFiles(0), baselineConfidence, ocr)
Console.WriteLine($"Baseline confidence: {baselineConfidence:P2}")
Console.WriteLine("Optimal filter sequence discovered")

' Apply discovered filters to all images
For Each imagePath As String In imageFiles
    Using input As New OcrImageInput(imagePath)
        ' Apply the filter sequence discovered by the wizard
        ' The actual filters would be applied here based on the wizard output
        Dim result = ocr.Read(input)
        Console.WriteLine($"Processed: {Path.GetFileName(imagePath)} - Confidence: {result.Confidence:P2}")
    End Using
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