Hi guys,
I have read through the mailing list and found some interesting code of
Bruno lowagie on how to extract images from existing pdfs.
I just need the image for further processing and it does work, but not
on all pdfs I have tested.
Actually I am only interested in one image of the pdf, and there is only
1 max. 2 images in the file, although there are more exported. That
isn't a problem because I'll find it easily by the size or actually
converting it internally to an Image and catching an exception which
indicates it isn't a supported image.....
I prepared 2 files for you - on is working the other on isn't:
http://web46131.server46.mivitec.net/public_data/3980491.pdf - this one
isn't working
http://web46131.server46.mivitec.net/public_data/3287348.pdf - this one
is working like a charm
Here is the code I use to extract the images:
import com.lowagie.text.pdf.*;
import java.awt.*;
import java.io.File;
import java.io.FileOutputStream;
public class ExtractPDFImage {
public static void main(String[] args) throws Exception {
PdfReader reader;
String path = "D:\\TEMP\\";
int fileCount = 0;
File dir = new File(path);
for (File file : dir.listFiles()) {
if (file.isFile() && file.canRead()) {
reader = new
PdfReader(file.getAbsolutePath());
fileCount++;
for (int i = 0; i < reader.getXrefSize();
i++)
{
PdfObject pdfobj =
reader.getPdfObject(i);
if (pdfobj != null) {
if (pdfobj.isStream()) {
PdfStream stream =
(PdfStream) pdfobj;
PdfObject pdfsubtype =
stream.get(PdfName.SUBTYPE);
if (pdfsubtype != null) {
// PDF Subtype OK
if
(pdfsubtype.toString().equals(PdfName.IMAGE.toString())) {
//image
found
byte[] img =
PdfReader.getStreamBytesRaw((PRStream) stream);
FileOutputStream out = new FileOutputStream(new File(path + "jpg\\" +
fileCount + "_" + i + ".jpg"));
out.write(img);
out.flush();
out.close();
}
}
}
}
}
}
}
}
}
I have no clue whats the difference in those files that don't work -
because the production-process is always the same!
Thank you very much for you help, yours Rene
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