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https://issues.apache.org/jira/browse/PDFBOX-4591?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Tilman Hausherr closed PDFBOX-4591.
-----------------------------------
Resolution: Duplicate
Closing as duplicate of PDFBOX-1752, this is the JPEG2000 ink blot bug in the
java jpeg2000 image plugin, see the two last comments in the issue on how to
fix this.
> 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
> Priority: Major
> 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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