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POExtract images using iTextSharp
 

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    <p>I have been using this code with great success to pull out the first image found in each page of a PDF. However, it is now not working with some new PDFs for an uknown reason. I have used other tools (Datalogics, etc) that do pull out the images fine with these new PDFs. However, I do not want to buy Datalogics or any tool if I can use iTextSharp. Can anybody tell me why this code is not finding the images in the PDF?</p> <p>Knowns: my PDFs only have 1 image per page and nothing else.</p> <pre><code>using iTextSharp.text; using iTextSharp.text.pdf; ... public static void ExtractImagesFromPDF(string sourcePdf, string outputPath) { // NOTE: This will only get the first image it finds per page. PdfReader pdf = new PdfReader(sourcePdf); RandomAccessFileOrArray raf = new iTextSharp.text.pdf.RandomAccessFileOrArray(sourcePdf); try { for (int pageNumber = 1; pageNumber &lt;= pdf.NumberOfPages; pageNumber++) { PdfDictionary pg = pdf.GetPageN(pageNumber); PdfDictionary res = (PdfDictionary)PdfReader.GetPdfObject(pg.Get(PdfName.RESOURCES)); PdfDictionary xobj = (PdfDictionary)PdfReader.GetPdfObject(res.Get(PdfName.XOBJECT)); if (xobj != null) { foreach (PdfName name in xobj.Keys) { PdfObject obj = xobj.Get(name); if (obj.IsIndirect()) { PdfDictionary tg = (PdfDictionary)PdfReader.GetPdfObject(obj); PdfName type = (PdfName)PdfReader.GetPdfObject(tg.Get(PdfName.SUBTYPE)); if (PdfName.IMAGE.Equals(type)) { int XrefIndex = Convert.ToInt32(((PRIndirectReference)obj).Number.ToString(System.Globalization.CultureInfo.InvariantCulture)); PdfObject pdfObj = pdf.GetPdfObject(XrefIndex); PdfStream pdfStrem = (PdfStream)pdfObj; byte[] bytes = PdfReader.GetStreamBytesRaw((PRStream)pdfStrem); if ((bytes != null)) { using (System.IO.MemoryStream memStream = new System.IO.MemoryStream(bytes)) { memStream.Position = 0; System.Drawing.Image img = System.Drawing.Image.FromStream(memStream); // must save the file while stream is open. if (!Directory.Exists(outputPath)) Directory.CreateDirectory(outputPath); string path = Path.Combine(outputPath, String.Format(@"{0}.jpg", pageNumber)); System.Drawing.Imaging.EncoderParameters parms = new System.Drawing.Imaging.EncoderParameters(1); parms.Param[0] = new System.Drawing.Imaging.EncoderParameter(System.Drawing.Imaging.Encoder.Compression, 0); System.Drawing.Imaging.ImageCodecInfo jpegEncoder = Utilities.GetImageEncoder("JPEG"); img.Save(path, jpegEncoder, parms); break; } } } } } } } } catch { throw; } finally { pdf.Close(); raf.Close(); } } </code></pre>
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    1. COCan you get the correct image name from the pdf eg:image1.png
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