iText7: Creating PDF from TIFF multipage image using iText

Do I need to use new Image( ImageDataFactory.createTiff(...))

Yes.

You want this: ImageDataFactory.createTiff(bytes, recoverFromImageError, page, direct)

Then you would open a new PDF, loop through the TIFF pages and:

1. Get the TIFF image size
2. Create a new page in the PDF matching the TIFF page size
3. Add the TIFF image to the new PDF page

Here is a note from Bruno Lowagie on using TIFF with iText 7: How to avoid an exception when importing a TIFF file?

I see you probably want fully working code. Here you go:

import com.itextpdf.io.image.ImageData;
import com.itextpdf.io.image.ImageDataFactory;
import com.itextpdf.io.image.TiffImageData;
import com.itextpdf.io.source.RandomAccessFileOrArray;
import com.itextpdf.io.source.RandomAccessSourceFactory;
import com.itextpdf.kernel.geom.PageSize;
import com.itextpdf.kernel.geom.Rectangle;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfPage;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.kernel.pdf.canvas.PdfCanvas;

public class TiffToPdf {
    public static void main(String[] args) throws IOException {
        Path tiffFile = Paths.get("/myfolder/origin.tiff");
        RandomAccessFileOrArray raf = new RandomAccessFileOrArray(new RandomAccessSourceFactory().createBestSource(tiffFile.toString()));
        int tiffPages = TiffImageData.getNumberOfPages(raf);
        raf.close();
        try (PdfDocument output = new PdfDocument(new PdfWriter("/myfolder/destination.pdf"))) {
            for (int page = 1; page <= tiffPages; page++) {
                ImageData tiffImage = ImageDataFactory.createTiff(tiffFile.toUri().toURL(), true, page, true);
                Rectangle tiffPageSize = new Rectangle(tiffImage.getWidth(), tiffImage.getHeight());
                PdfPage newPage = output.addNewPage(new PageSize(tiffPageSize));
                PdfCanvas canvas = new PdfCanvas(newPage);
                canvas.addImage(tiffImage, tiffPageSize, false);
            }
        }
    }
}

Some might suggest you use the high level API to achieve this a little more cleanly but this should be sufficient for your question.

This is the same above but in vb.net. It converts a multipage TIFF to a PDF.

Imports System.IO
Imports iTextSharp.text
Imports iTextSharp.text.pdf

Sub ConvertTIFF2PDF(ByVal inFile As String, ByVal outFile As String)  

    Dim pdfDoc As PdfDocument = New PdfDocument(New PdfWriter(outFile))
    Dim doc As Document = New Document(pdfDoc)

    Dim aFile = New RandomAccessFileOrArray(New RandomAccessSourceFactory().CreateBestSource(inFile.ToString))

    Dim tiffPages = TiffImageData.GetNumberOfPages(aFile)


    Dim uri As System.Uri = New Uri(inFile)


    For i As Integer = 1 To tiffPages

        Console.WriteLine("tiffPages: " & (i) & " of " & tiffPages.ToString)

        Dim tiffImage = ImageDataFactory.CreateTiff(uri, False, i, False)
        Dim tiffPageSize = New Geom.Rectangle(tiffImage.GetWidth(), tiffImage.GetHeight())
        Dim newPage = pdfDoc.AddNewPage(New PageSize(tiffPageSize))
        Dim canvas As PdfCanvas = New PdfCanvas(newPage)
        canvas.AddImage(tiffImage, tiffPageSize, False)

    Next


    doc.Close()
    pdfDoc.Close()
    aFile.Close()

End Sub