You're making progress! What you are still missing the processing of /Filter. When /Filter == /DCTDecode then you can leave the data "unfiltered" and treat it as a JPEG, due to a special case in PDF. However, for all other values of /Filter, you need to DECODE the data and then treat that as the image data. You may need to use something such as JAI to then convert that information into a usable image format.
Leonard -----Original Message----- From: ChristinaD [mailto:christina.an...@rediffmail.com] Sent: Thursday, December 03, 2009 4:49 AM To: itext-questions@lists.sourceforge.net Subject: Re: [iText-questions] Extract PDF embedded images using iText Hi Leo, below is my pdfstream{/Filter=/DCTDecode, /Type=/XObject, /Length=52803, /BitsPerComponent=8, /Height=375, /ColorSpace=/DeviceRGB, /Subtype=/Image, /Width=500} byte[] imagedata= PdfReader.getStreamBytesRaw((PRStream) stream); int width = Integer.parseInt((stream.get(PdfName.WIDTH)).toString()); int height = Integer.parseInt((stream.get(PdfName.HEIGHT)).toString()); int bpc = Integer.parseInt((stream.get(PdfName.BITSPERCOMPONENT)).toString()); int components = 3; Image img = Image.getInstance(width, height, components, bpc, imagedata); Facing proble: * Getting 0 dpi : img.getDpiX() * Tried to write this image in document then not getting the proper image like original. img.scalePercent(20.0f); document.add(img); * Below code is working fine with the jpeg images embedded in pdf document. Image img = Image.getInstance(imagedata); Leonard Rosenthol-3 wrote: > > PDF images are NOT in a standard format - they are "arrays of color > values" in a specific colorspace with a certain number of bits per > component and potentially processed with one or more "filters". Details > are described in ISO 32000-1. > > As such, you will need to extract the image stream into some "image > processing library" that knows what to do with the various structures and > then can also, possibly, save them out to various image formats. JAI is > probably a good place to look. > > -----Original Message----- > From: java.geek [mailto:java.g...@rediffmail.com] > Sent: Sunday, November 29, 2009 9:12 AM > To: itext-questions@lists.sourceforge.net > Subject: [iText-questions] Extract PDF embedded images using iText > > > Hi All, I am trying to extract images from pdf document using iText > library. > > I am able to create the instance of only JPEG format(*.jpg, *.jpeg, > *.jpe). > **** Image imageObject = Image.getInstance(image); **** > Not other format images are embedded in PDF document. > > > public void extractImagesInfo(){ > try{ > PdfReader chartReader = new > PdfReader("MyPdf.pdf"); > for (int i = 0; i < chartReader.getXrefSize(); i++) { > PdfObject pdfobj = chartReader.getPdfObject(i); > if (pdfobj != null && pdfobj.isStream()) { > PdfStream stream = (PdfStream) pdfobj; > PdfObject pdfsubtype = stream.get(PdfName.SUBTYPE); > //System.out.println("Stream subType: " + pdfsubtype); > if (pdfsubtype != null && > pdfsubtype.toString().equals(PdfName.IMAGE.toString())) { > byte[] image = PdfReader.getStreamBytesRaw((PRStream) > stream); > Image imageObject = Image.getInstance(image); > System.out.println("Resolution" + imageObject.getDpiX()); > System.out.println("Height" + imageObject.getHeight()); > System.out.println("Width" + imageObject.getWidth()); > > } > } > } > }catch(Exception e){ > e.printStackTrace(); > } > > } > -- > View this message in context: > http://old.nabble.com/Extract-PDF-embedded-images-using-iText-tp26562385p26562385.html > Sent from the iText - General mailing list archive at Nabble.com. > > > ------------------------------------------------------------------------------ > Let Crystal Reports handle the reporting - Free Crystal Reports 2008 > 30-Day > trial. Simplify your report design, integration and deployment - and focus > on > what you do best, core application coding. Discover what's new with > Crystal Reports now. http://p.sf.net/sfu/bobj-july > _______________________________________________ > iText-questions mailing list > iText-questions@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/itext-questions > > Buy the iText book: http://www.1t3xt.com/docs/book.php > Check the site with examples before you ask questions: > http://www.1t3xt.info/examples/ > You can also search the keywords list: > http://1t3xt.info/tutorials/keywords/ > > ------------------------------------------------------------------------------ > Let Crystal Reports handle the reporting - Free Crystal Reports 2008 > 30-Day > trial. Simplify your report design, integration and deployment - and focus > on > what you do best, core application coding. Discover what's new with > Crystal Reports now. http://p.sf.net/sfu/bobj-july > _______________________________________________ > iText-questions mailing list > iText-questions@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/itext-questions > > Buy the iText book: http://www.1t3xt.com/docs/book.php > Check the site with examples before you ask questions: > http://www.1t3xt.info/examples/ > You can also search the keywords list: > http://1t3xt.info/tutorials/keywords/ > > -- View this message in context: http://old.nabble.com/Extract-PDF-embedded-images-using-iText-tp26562385p26623379.html Sent from the iText - General mailing list archive at Nabble.com. ------------------------------------------------------------------------------ Join us December 9, 2009 for the Red Hat Virtual Experience, a free event focused on virtualization and cloud computing. Attend in-depth sessions from your desk. Your couch. Anywhere. http://p.sf.net/sfu/redhat-sfdev2dev _______________________________________________ iText-questions mailing list iText-questions@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/itext-questions Buy the iText book: http://www.1t3xt.com/docs/book.php Check the site with examples before you ask questions: http://www.1t3xt.info/examples/ You can also search the keywords list: http://1t3xt.info/tutorials/keywords/ ------------------------------------------------------------------------------ Join us December 9, 2009 for the Red Hat Virtual Experience, a free event focused on virtualization and cloud computing. Attend in-depth sessions from your desk. Your couch. Anywhere. http://p.sf.net/sfu/redhat-sfdev2dev _______________________________________________ iText-questions mailing list iText-questions@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/itext-questions Buy the iText book: http://www.1t3xt.com/docs/book.php Check the site with examples before you ask questions: http://www.1t3xt.info/examples/ You can also search the keywords list: http://1t3xt.info/tutorials/keywords/
