Am 13.09.2015 um 16:04 schrieb Troy Smith:
Hi,
The code I sent is a quick example from a larger code base. In the larger
code base we do a lot of image manipulation. For example, the image is
loaded into memory and the pixels are analzed. This code handles 70 pages
without increasing the heapsize.
So, I can increase the heapsize, but I was wondering if there is something
not working well with pdfbox given we hit the heaps pace limit on the first
page.
It is by design... the huge image has to be loaded in memory. See
screenshot below, page 1 is harmless, but page 2 is 12301 * 8296 in RGB
so that would take at least 306,147,288 bytes, but likely more. Now that
number is used several times, due to some internal copying by PDFBox and
by Java itself.
I could also get it to work with 2.2GB. Then I tried PDFToImage and
resolution 300, this worked with 2.2GB too.
Tilman
Thanks.
Troy
On Sep 13, 2015 1:29 AM, "Tilman Hausherr" <[email protected]> wrote:
Am 13.09.2015 um 04:54 schrieb Troy Smith:
Hi,
I'm trying to create an image for each page of a pdf. I'm getting an out
of heap space error, usually when creating the image of the second page.
The code I'm using is below. I may be doing something braindead, but I'm
not seeing it. Any advice or thoughts?
I'm able to display it with -Xmx4g option in PDFDebugger. Your code may
require even more, because you're also creating a 300dpi image.
Page 2 is huge. It has an image that has a size of almost 5MB compressed.
Tilman
A link to a .pdf that produces this problem:
https://www.dropbox.com/s/osw235wyvqp0kxi/test.pdf?dl=0
I'm using pdfbox-app-2.0.0-20150911.224202-1643.jar.
Best regards,
Troy
import java.awt.image.BufferedImage;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import javax.imageio.ImageIO;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.rendering.PDFRenderer;
import org.apache.pdfbox.rendering.ImageType;
public class ImageTest{
public static void main( String [] args ) throws Exception{
String pdfFile = args[0];
PDDocument doc;
String imageDocPrefix = pdfFile.substring(0,pdfFile.length()-4);
File pdfF = new File(pdfFile);
BufferedImage bim;
String name;
File out;
try{
doc = PDDocument.load(pdfF);
PDFRenderer pdfRenderer = new PDFRenderer(doc);
for (int page = 0; page < doc.getNumberOfPages(); ++page){
System.out.println("Testing..." + page);
bim = pdfRenderer.renderImageWithDPI(page, 300, ImageType.RGB);
name = imageDocPrefix +"_"+ String.format("%04d",page) +".png";
out = new File(name);
ImageIO.write(bim, "PNG", out);
}
doc.close();
}
catch(Exception e){
System.err.println("error writing images from pdf:" + pdfFile + ":" + e);
}
}
}
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