Dear Mr Leonard,
So you mean my code is right, but i need use JAI for saving this Image
object into picture file ?
Thanks and Regards,
Candra
Leonard Rosenthol wrote:
>
> Your solution will ONLY work for RGB and CMYK data that is compressed
> using DCTDecode filter.
>
> Any other filter or colorspace won't work. You will need to use JAI
> (or similar) to recode the image data.
>
> Leonard
>
>
> On Oct 26, 2007, at 7:02 AM, Candra Gunawan wrote:
>
>>
>> Dear Mr Bruno,
>> i'm trying to convert image from PDF to Pict File
>>
>> PdfReader reader = new PdfReader(srcFile);
>> int total_number_of_pictures = 0;
>> for (int i = 0; i < reader.getXrefSize(); i++) {
>> PdfObject pdfobj = reader.getPdfObject(i);
>> if (pdfobj != null) {
>> if (pdfobj.isStream()) {
>> PdfStream pdfdict = (PdfStream)
>> pdfobj;
>> PdfObject pdfsubtype = pdfdict
>> .get(PdfName.SUBTYPE);
>> if (pdfsubtype == null) {
>> continue;
>> }
>> if (!pdfsubtype.toString().equals(
>> PdfName.IMAGE.toString())) {
>> continue;
>> }
>> System.out.println
>> ("total_number_of_pictures: "+
>> total_number_of_pictures);
>>
>> System.out.println("height:"+pdfdict.get(PdfName.HEIGHT));
>> System.out.println("width:"+
>> pdfdict.get(PdfName.WIDTH));
>>
>> System.out.println("bitspercomponent:"+pdfdict.get
>> (PdfName.BITSPERCOMPONENT));
>> byte[] barr =
>> PdfReader.getStreamBytesRaw((PRStream)pdfdict);
>> java.awt.Image im =
>> Toolkit.getDefaultToolkit().createImage(barr);
>>
>> BufferedImage img = new
>> BufferedImage(300,300,BufferedImage.TYPE_INT_ARGB);
>>
>> Graphics graph = img.getGraphics();
>> graph.drawImage(im,100,100,null);
>>
>> FileOutputStream os = new
>> FileOutputStream("test"+total_number_of_pictures+".jpg");
>> ImageIO.write(img,"JPEG",os);
>> os.close();
>>
>>
>> total_number_of_pictures++;
>> }
>> }
>> }
>>
>> this is my code, but the result is blank pict (black), is my code
>> is wrong ?
>> which one is wrong ?
>> Thanks
>>
>>
>>
>>
>> Bruno Lowagie (iText) wrote:
>>>
>>> Gunawan Candra wrote:
>>>> How can I get raw ByteStream for image in PDF ?
>>>
>>> So you have an existing PDF and you want to grab the bytes
>>> of an Image? OK, then you could find some inspiration in
>>> the iText toolbox: http://itexttoolbox.sourceforge.net/
>>>
>>> There's a plug-in called ImageXRefViewer and if you look
>>> at its execute() method, you'll discover one way to get
>>> the PDF object that has the stream with the image bytes:
>>> http://itexttoolbox.svn.sourceforge.net/viewvc/itexttoolbox/main/
>>> src/com/lowagie/tools/plugins/ImageXRefViewer.java?
>>> revision=110&view=markup
>>>
>>>> How can I get the type of raw bytestream (JPEG/ TIFF/ PNG/) for
>>>> image in
>>>> PDF ?
>>>
>>> Hmm... it's not because you add an image of a certain type to
>>> a PDF that this image will keep that same type.
>>> Maybe you should read the PDF reference (available as a free
>>> download on adobe.com) to have a better understanding about
>>> images in PDF.
>>>
>>>> Can i-text convert / grab image from PDF file ?
>>>
>>> Grab: yes; convert: it depends.
>>> See my first answer, find out how ImageXRefViewer works.
>>>
>>>> Can i-text resize image (I mean, resize the physically file) from
>>>> PDF ?
>>>
>>> No; iText doesn't reduce the quality/filesize of images;
>>> you'll need something like JAI to do this.
>>> br,
>>> Bruno
>>>
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>>
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>> tf4690732.html#a13425013
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>>
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>
>
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