Extract Image from a particular page in PDF

Question

I want to extract an Image from a PDF file. I tried with the following code and it extracted a jpeg Image perfectly from the PDF. The problem is how to extract image from a

Answer 1

The following is the code which I am using to extract images from PDF. It works completely fine for me.

//   Required: iTextSharp.dll

using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using iTextSharp.text.pdf.parser;
using Dotnet = System.Drawing.Image;
using iTextSharp.text.pdf;

namespace PDF_Parsing {
    partial class ExtractPdfImage
    {
        string imgPath = @"c:\extractedImg.png";
        private void ExtractImage(string pdfFile)
        {
            const int pageNumber = 1;
            PdfReader pdf = new PdfReader(pdfFile);
            PdfDictionary pg = pdf.GetPageN(pageNumber);
            PdfDictionary res =               (PdfDictionary)PdfReader.GetPdfObject(pg.Get(PdfName.RESOURCES));
            PdfDictionary xobj = (PdfDictionary)PdfReader.GetPdfObject(res.Get(PdfName.XOBJECT));
            foreach (PdfName name in xobj.Keys)
            {
                PdfObject obj = xobj.Get(name);
                if (obj.IsIndirect())
                {
                    PdfDictionary tg = (PdfDictionary)PdfReader.GetPdfObject(obj);
                    string width = tg.Get(PdfName.WIDTH).ToString();
                    string height = tg.Get(PdfName.HEIGHT).ToString();
                    ImageRenderInfo imgRI = ImageRenderInfo.CreateForXObject(new   Matrix(float.Parse(width), float.Parse(height)),
                        (PRIndirectReference)obj, tg);
                    RenderImage(imgRI);
                }
            }
        }

        private void RenderImage(ImageRenderInfo renderInfo)
        {
            PdfImageObject image = renderInfo.GetImage();
            using (Dotnet dotnetImg = image.GetDrawingImage())
            {
                if (dotnetImg != null)
                {
                    using (MemoryStream ms = new MemoryStream())
                    {
                        dotnetImg.Save(ms, ImageFormat.Tiff);
                        Bitmap d = new Bitmap(dotnetImg);
                        d.Save(imgPath);
                    }
                }
            }
        }
    }
}