Cómo crear un software de OCR en C#

Basic Text Recognition

using IronOcr;
using System;

class Program
{
    static void Main()
    {
        var ocrTesseract = new IronTesseract();
        using (var ocrInput = new OcrInput("ocr.png"))
        {
            var ocrResult = ocrTesseract.Read(ocrInput);
            string recognizedText = ocrResult.Text;
            Console.WriteLine(recognizedText);
        }
    }
}

using IronOcr;
using System;

class Program
{
    static void Main()
    {
        var ocrTesseract = new IronTesseract();
        using (var ocrInput = new OcrInput("ocr.png"))
        {
            var ocrResult = ocrTesseract.Read(ocrInput);
            string recognizedText = ocrResult.Text;
            Console.WriteLine(recognizedText);
        }
    }
}

Imports IronOcr
Imports System

Friend Class Program
	Shared Sub Main()
		Dim ocrTesseract = New IronTesseract()
		Using ocrInput As New OcrInput("ocr.png")
			Dim ocrResult = ocrTesseract.Read(ocrInput)
			Dim recognizedText As String = ocrResult.Text
			Console.WriteLine(recognizedText)
		End Using
	End Sub
End Class

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Advanced OCR Options

IronOCR provides various options that enable you to customize the OCR process according to your image files and requirements. For example, you can specify the OCR language, adjust the image preprocessing settings, or enable text cleaning. Here's an example that demonstrates some of these advanced options:

using IronOcr;
using System;

class Program
{
    static void Main()
    {
        var ocr = new IronTesseract();
        using var ocrInput = new OcrInput();
        ocrInput.LoadImage(@"images\image.png");

        // Set OCR language to English
        ocr.Language = OcrLanguage.English;

        // Enable text cleaning and enhance the resolution
        ocrInput.DeNoise();
        ocrInput.EnhanceResolution(225);

        var result = ocr.Read(ocrInput);
        if (!string.IsNullOrEmpty(result.Text))
        {
            Console.WriteLine($"Recognized Text: {result.Text}");
        }
    }
}

using IronOcr;
using System;

class Program
{
    static void Main()
    {
        var ocr = new IronTesseract();
        using var ocrInput = new OcrInput();
        ocrInput.LoadImage(@"images\image.png");

        // Set OCR language to English
        ocr.Language = OcrLanguage.English;

        // Enable text cleaning and enhance the resolution
        ocrInput.DeNoise();
        ocrInput.EnhanceResolution(225);

        var result = ocr.Read(ocrInput);
        if (!string.IsNullOrEmpty(result.Text))
        {
            Console.WriteLine($"Recognized Text: {result.Text}");
        }
    }
}

Imports IronOcr
Imports System

Friend Class Program
	Shared Sub Main()
		Dim ocr = New IronTesseract()
		Dim ocrInput As New OcrInput()
		ocrInput.LoadImage("images\image.png")

		' Set OCR language to English
		ocr.Language = OcrLanguage.English

		' Enable text cleaning and enhance the resolution
		ocrInput.DeNoise()
		ocrInput.EnhanceResolution(225)

		Dim result = ocr.Read(ocrInput)
		If Not String.IsNullOrEmpty(result.Text) Then
			Console.WriteLine($"Recognized Text: {result.Text}")
		End If
	End Sub
End Class

The code uses IronOCR to perform OCR on an image file "image.png" located in the "images" folder. It sets the OCR language to English, cleans the image noise, and enhances its resolution. The recognized text from the image is extracted and then printed to the console.

Barcode Reading

IronOCR also supports barcode reading, allowing you to make software to extract barcode information from images. Here's a code example that demonstrates how to read a barcode using IronOCR:

using IronOcr;
using System;

class Program
{
    static void Main()
    {
        var ocrTesseract = new IronTesseract();
        ocrTesseract.Configuration.ReadBarCodes = true;

        using var ocrInput = new OcrInput();
        ocrInput.LoadImage(@"images\imageWithBarcode.png");

        var ocrResult = ocrTesseract.Read(ocrInput);
        foreach (var barcode in ocrResult.Barcodes)
        {
            Console.WriteLine(barcode.Value);
        }
    }
}

using IronOcr;
using System;

class Program
{
    static void Main()
    {
        var ocrTesseract = new IronTesseract();
        ocrTesseract.Configuration.ReadBarCodes = true;

        using var ocrInput = new OcrInput();
        ocrInput.LoadImage(@"images\imageWithBarcode.png");

        var ocrResult = ocrTesseract.Read(ocrInput);
        foreach (var barcode in ocrResult.Barcodes)
        {
            Console.WriteLine(barcode.Value);
        }
    }
}

Imports IronOcr
Imports System

Friend Class Program
	Shared Sub Main()
		Dim ocrTesseract = New IronTesseract()
		ocrTesseract.Configuration.ReadBarCodes = True

		Dim ocrInput As New OcrInput()
		ocrInput.LoadImage("images\imageWithBarcode.png")

		Dim ocrResult = ocrTesseract.Read(ocrInput)
		For Each barcode In ocrResult.Barcodes
			Console.WriteLine(barcode.Value)
		Next barcode
	End Sub
End Class

The code uses IronOCR to detect and read barcodes from an image file "imageWithBarcode.png" in the "images" folder. It configures IronOCR to enable barcode reading by setting ReadBarCodes to true. The detected barcode values are then printed to the console.

PDF Text Extraction

IronOCR can also extract text from PDFs and scanned documents. Here's a code example that demonstrates how to extract text from a PDF file using IronOCR:

using IronOcr;
using System;

class Program
{
    static void Main()
    {
        var ocrTesseract = new IronTesseract();
        using var ocrInput = new OcrInput();

        // OCR entire document
        ocrInput.LoadPdf("Email_Report.pdf");

        // Alternatively OCR selected page numbers
        int[] pages = { 1, 2, 3, 4, 5 };
        ocrInput.LoadPdfPages("example.pdf", pages, Password: "password");

        var ocrResult = ocrTesseract.Read(ocrInput);
        Console.WriteLine(ocrResult.Text);
    }
}

using IronOcr;
using System;

class Program
{
    static void Main()
    {
        var ocrTesseract = new IronTesseract();
        using var ocrInput = new OcrInput();

        // OCR entire document
        ocrInput.LoadPdf("Email_Report.pdf");

        // Alternatively OCR selected page numbers
        int[] pages = { 1, 2, 3, 4, 5 };
        ocrInput.LoadPdfPages("example.pdf", pages, Password: "password");

        var ocrResult = ocrTesseract.Read(ocrInput);
        Console.WriteLine(ocrResult.Text);
    }
}

Imports IronOcr
Imports System

Friend Class Program
	Shared Sub Main()
		Dim ocrTesseract = New IronTesseract()
		Dim ocrInput As New OcrInput()

		' OCR entire document
		ocrInput.LoadPdf("Email_Report.pdf")

		' Alternatively OCR selected page numbers
		Dim pages() As Integer = { 1, 2, 3, 4, 5 }
		ocrInput.LoadPdfPages("example.pdf", pages, Password:= "password")

		Dim ocrResult = ocrTesseract.Read(ocrInput)
		Console.WriteLine(ocrResult.Text)
	End Sub
End Class

The code uses IronOCR to perform OCR processing on a PDF document named "Email_Report.pdf". It can OCR the entire document using LoadPdf, or specific pages from "example.pdf" using LoadPdfPages with a password. The recognized text from the OCR operation is printed to the console.