Convert a PDF file to image

Question

I wanted to convert PDF document into image. I was using Ghost4j.

Problem: Ghost4J needs gsdll32.dll file at runtime, and I do not

Answer 1

The way over PDFBox is a good way to avoid native bindings. Try to use the PDFImageWriter from the PDFBox, i did the same with it in a few lines and it worked perfectly. You have to extract the PDFDocument and use the writer with it.

PDFImageWriter.write(doc, "png", null, , Integer.MAX_VALUE, "picture");

For all pages.

PDFImageWriter.write(doc, "png", null, 0, 0, "picture");

See: PDFImageWriter Javadoc

Answer 2

Probably you have try to convert corrupted PDF file. I've the same errors when the PDF file contains JPXEncoded streams.

Answer 3

You can easily convert PDF into image using PDFBox. renderImageWithDPI method of PDFRenderer class of PDFBox is used to convert pdf to image.

PDDocument doc=PDDocument.load(new File("filepath/sample.pdf"));
PDFRenderer pdfRenderer = new PDFRenderer(doc);
BufferedImage bffim = pdfRenderer.renderImageWithDPI(pageNo, 300, ImageType.RGB);
        String fileName = "image-" + page + ".png";
        ImageIOUtil.writeImage(bim, fileName, 300);

Answer 4

You can try to use NonSequentialParser to avoid errors with some PDF files (with incremental updates):

PDDocument doc = PDDocument.loadNonSeq(new File("/document.pdf"));

Answer 5

 try {           
                PDDocument document = PDDocument.load(PdfInfo.getPDFWAY());
                if (document.isEncrypted()) {
                    document.decrypt(PdfInfo.getPASSWORD());
                }
                if ("bilevel".equalsIgnoreCase(PdfInfo.getCOLOR())) {
                    PdfInfo.setIMAGETYPE( BufferedImage.TYPE_BYTE_BINARY);
                } else if ("indexed".equalsIgnoreCase(PdfInfo.getCOLOR())) {
                    PdfInfo.setIMAGETYPE(BufferedImage.TYPE_BYTE_INDEXED);
                } else if ("gray".equalsIgnoreCase(PdfInfo.getCOLOR())) {
                    PdfInfo.setIMAGETYPE(BufferedImage.TYPE_BYTE_GRAY);
                } else if ("rgb".equalsIgnoreCase(PdfInfo.getCOLOR())) {
                    PdfInfo.setIMAGETYPE(BufferedImage.TYPE_INT_RGB);
                } else if ("rgba".equalsIgnoreCase(PdfInfo.getCOLOR())) {
                    PdfInfo.setIMAGETYPE(BufferedImage.TYPE_INT_ARGB);
                } else {
                    System.exit(2);
                }
                PDFImageWriter imageWriter = new PDFImageWriter();
                boolean success = imageWriter.writeImage(document, PdfInfo.getIMAGE_FORMAT(),PdfInfo.getPASSWORD(),
                        PdfInfo.getSTART_PAGE(),PdfInfo.getEND_PAGE(),PdfInfo.getOUTPUT_PREFIX(),PdfInfo.getIMAGETYPE(),PdfInfo.getRESOLUTION());
                if (!success) {
                    System.exit(1);
                }
                document.close();

        } catch (IOException | CryptographyException | InvalidPasswordException ex) {
            Logger.getLogger(PdfToImae.class.getName()).log(Level.SEVERE, null, ex);
        }
public class PdfInfo {
    private static String PDFWAY;    
    private static String OUTPUT_PREFIX;
    private static String PASSWORD;
    private static int START_PAGE=1;
    private static int END_PAGE=Integer.MAX_VALUE;
    private static String IMAGE_FORMAT="jpg";
    private static String COLOR="rgb";
    private static int RESOLUTION=256;
    private static int IMAGETYPE=24;
    private static String filename;
    private static String filePath="";
}

Answer 6

For the error:

org.apache.pdfbox.util.PDFStreamEngine processOperator INFO: unsupported/disabled operation

You need to include fontbox-1.7.1 jar in the class path apart from Apache pdfbox jar which will fix your issue as PDFBox internally uses fontbox-1.7.1