[PDFBOX-5816] PDFRenderer.renderImage creates black line clouds on the text

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 2.0.30, 2.0.31
• Component/s: PDModel, Rendering
• Labels: JPEG2000 JPXDecode JPXFilter
• Environment: Java 8

Language

Java

• Assignee: Unassigned
• Reporter: ExSp
• Created: 08/May/24 13:09
• Updated: 08/May/24 14:14
• Resolved: 08/May/24 13:34

Description

For some PDF files, the PDFRenderer.renderImage method creates an image with black line clouds on the text that are not visible in the original PDF. Unfortunately, the files contain personal data, so I cannot make them available for examination. The attached screenshots hopefully give a first impression of the problem. Is there any way for me to narrow down the problem or analyze the PDF so that I can provide more information?

The source code does something like this:

try (PDDocument document = PDDocument.load(pdfData)) {
  PDFRenderer pdfRenderer = new PDFRenderer(document);
  int pageCount = document.getNumberOfPages();
  for (int pageIndex = 0; pageIndex < pageCount; ++pageIndex) {
    PDPage page = document.getPage(pageIndex);
    BufferedImage pageImage = pdfRenderer.renderImage(pageIndex);
...
  }
}

Issue Links

• duplicates: PDFBOX-1752 Rendering PDF containing Jpeg2000 fails