Resolved…
Even I got the same exception of “Parameter is not valid” and after so much of
work with the help of the link provided by der_chirurg
(http://kuujinbo.info/iTextSharp/CCITTFaxDecodeExtract.aspx ) I resolved it
and following is the code:
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 PDF_ImgExtraction
{
string imgPath;
private void ExtractImage(string pdfFile)
{
PdfReader pdfReader = new PdfReader(files[fileIndex]);
for (int pageNumber = 1; pageNumber <= pdfReader.NumberOfPages; pageNumber++)
{
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);
}
}
}
}
}
}