使用itextsharp从pdf中删除嵌入式图像

Question

There are several examples of removing or resizeing images using itextsharp on the net, but i'm unable to find exemples of removing inline images.

I´m using the following code to remove XObject images:

         PdfWriter writer = st.Writer;
            PdfDictionary pg = reader.GetPageN(1);
            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.IsDictionary())
                    {
                        PdfDictionary tg = (PdfDictionary)PdfReader.GetPdfObject(obj);
                        PdfName type = (PdfName)PdfReader.GetPdfObject(tg.Get(PdfName.SUBTYPE));
                        //PdfName type = (PdfName)PdfReader.GetPdfObject(tg.Get(PdfName.SUBTYPE));



                        if (PdfName.IMAGE.Equals(type))
                        {
                            int xrefIdx = ((PRIndirectReference)obj).Number;
                            PdfObject pdfObj = reader.GetPdfObject(xrefIdx);
                            PdfStream str = (PdfStream)(pdfObj);
                            byte[] bytes = PdfReader.GetStreamBytesRaw((PRStream)str);
                            iTextSharp.text.Image img = iTextSharp.text.Image.GetInstance((PRIndirectReference)obj);

                            string filter = tg.Get(PdfName.FILTER).ToString();

                            if (filter == "/DCTDecode")
                            {
                                PdfReader.KillIndirect(obj);
                                Stream stBrasao2 = File.OpenRead(pasta_recurso + "brasao.jpg");
                                iTextSharp.text.Image img2 = iTextSharp.text.Image.GetInstance(stBrasao2);


                                writer.AddDirectImageSimple(img2, (PRIndirectReference)obj);
                                break;
                            }
                        }
                    }
                }
            }

Is there any way to adapt this to remove inline images rather than XObject images?

Thanks.

Answer 1

The code wont remove inline images, with iText such task is done as Bruno Lowagie pointed out in the comments. In the end my solution was to parse the pdf with PDFSharp before IText. I´m using PDFSharp to read the pdf stream read the bytes, remove the bytes from image and then output a file for iText.