Archiving digital documents with PDF/A

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import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.pdfocr.OcrPdfCreator;
import com.itextpdf.pdfocr.tesseract4.Tesseract4LibOcrEngine;
import com.itextpdf.pdfocr.tesseract4.Tesseract4OcrEngineProperties;
 
import java.io.File;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;
 
 
public class JDoodle {
 
    static final Tesseract4OcrEngineProperties tesseract4OcrEngineProperties = new Tesseract4OcrEngineProperties();
    private static List LIST_IMAGES_OCR = Arrays.asList(new File("invoice_front.jpg"));
    private static String OUTPUT_PDF = "/myfiles/hello.pdf";
    private static final String DEFAULT_RGB_COLOR_PROFILE_PATH = "profiles/sRGB_CS_profile.icm";
 
    public static void main(String[] args) throws IOException {
 
        final Tesseract4LibOcrEngine tesseractReader = new Tesseract4LibOcrEngine(tesseract4OcrEngineProperties);
        tesseract4OcrEngineProperties.setPathToTessData(new File(TESS_DATA_FOLDER));        
 
        OcrPdfCreatorProperties properties = new OcrPdfCreatorProperties();
        properties.setPdfLang("en"); //we need to define a language to make it PDF/A compliant
 
        OcrPdfCreator ocrPdfCreator = new OcrPdfCreator(tesseractReader, properties);
        try (PdfWriter writer = new PdfWriter(OUTPUT_PDF)) {
            ocrPdfCreator.createPdfA(LIST_IMAGES_OCR, writer, getRGBPdfOutputIntent()).close();
        }
    }
 
    public static PdfOutputIntent getRGBPdfOutputIntent() throws FileNotFoundException {
        InputStream is = new FileInputStream(DEFAULT_RGB_COLOR_PROFILE_PATH);
        return new PdfOutputIntent("", "",
                "", "sRGB IEC61966-2.1", is);
    }
 
}

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using System.Collections.Generic;
using System.IO;
using iText.Kernel.Pdf;
using iText.Pdfocr;
using iText.Pdfocr.Tesseract4;
 
public class Program
{
    private static readonly Tesseract4OcrEngineProperties tesseract4OcrEngineProperties = new Tesseract4OcrEngineProperties();
    private static string OUTPUT_PDF = "/myfiles/hello.pdf";
    private const string DEFAULT_RGB_COLOR_PROFILE_PATH = @"profiles\sRGB_CS_profile.icm";
    private static IList LIST_IMAGES_OCR = new List
    {
        new FileInfo("invoice_front.jpg")
    };
 
    static void Main()
    {
        var tesseractReader = new Tesseract4LibOcrEngine(tesseract4OcrEngineProperties);
        tesseract4OcrEngineProperties.SetPathToTessData(new FileInfo(TESS_DATA_FOLDER));
 
        var properties = new OcrPdfCreatorProperties();
        properties.SetPdfLang("en"); //we need to define a language to make it PDF/A compliant
 
        var ocrPdfCreator = new OcrPdfCreator(tesseractReader, properties);
        using (var writer = new PdfWriter(OUTPUT_PDF))
        {
            ocrPdfCreator.CreatePdfA(LIST_IMAGES_OCR, writer, GetRgbPdfOutputIntent()).Close();
        }
    }
 
    static PdfOutputIntent GetRgbPdfOutputIntent()
    {
       Stream @is = new FileStream(DEFAULT_RGB_COLOR_PROFILE_PATH, FileMode.Open, FileAccess.Read);
       return new PdfOutputIntent("", "", "", "sRGB IEC61966-2.1", @is);
    }
}