[jira] [Created] (PDFBOX-4591) Black dots and rectangles when converting from pdf to png

["Michał Pomarański (JIRA)" <ji...@apache.org>]

Michał Pomarański created PDFBOX-4591:
-----------------------------------------

             Summary: Black dots and rectangles when converting from pdf to png
                 Key: PDFBOX-4591
                 URL: https://issues.apache.org/jira/browse/PDFBOX-4591
             Project: PDFBox
          Issue Type: Bug
    Affects Versions: 2.0.16
            Reporter: Michał Pomarański
         Attachments: test-pdf.pdf

I get a weird black dots and rectangles/elipses when I'm trying to convert a pdf file to png image with pdfbox. I haven't noticed anything specific about those pdf files except that they're scanned files. I've also tried using the linux tool `convert` and with that tool I don't have any problems. Here's a sample of the code I'm using:
{code:java}
private static BufferedImage rasterizePdfBox(String ref, int pageIndex, PDFRenderer renderer, PreviewMode mode) throws IOException {
    Future<BufferedImage> result = executorService.submit(() -> {
        LOGGER.info(String.format("Generate preview for ref: %s, page: %s, mode: %s ", ref, pageIndex, mode.name()));
        return renderer.renderImageWithDPI(pageIndex - 1, mode.getDpi(), ImageType.RGB);
    });

    try {
        return result.get();
    } catch (InterruptedException | ExecutionException e) {
        LOGGER.error(String.format("Error when generating preview: %s", e.getMessage()));
        Thread.currentThread().interrupt();
        throw new IOException(e.getMessage());
    }
{code}
 

I'm attaching an example file that I have this problem with. Thanks!



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