Strange color issues with convertToImage method
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Key: PDFBOX-1223
URL: https://issues.apache.org/jira/browse/PDFBOX-1223
Project: PDFBox
Issue Type: Bug
Affects Versions: 1.6.0
Reporter: Jimi Hullegård
While testing PDFBox I noticed a few strange color issues when converting the
first page of an pdf to an image using the method convertToImage on a PDPage.
An example pdf and resulting png is attached for each case.
- Case 1: Most of the colors seem to get inverted.
- Case 2: The green color of the area in the top right is paler the the
original, and the text under the logo at the bottom right is quite "pixely"
- Case 3: The blue area under the text is missing
- Case 4: The red area should be semi-transparent (so the rose stem can be seen
behind it), not solid.
I compared all resulting images with how the pdf looks in Foxit Reader 5.1 on
Windows 7.
This is the code I used:
---------
PDFParser parser = new PDFParser(new FileInputStream(pdfInputFile));
parser.parse();
PDDocument document = parser.getPDDocument();
List<PDPage> pages = (List<PDPage>)document.getDocumentCatalog().getAllPages();
if (pages.size() > 0) {
PDPage page = pages.get(0);
BufferedImage image = page.convertToImage(BufferedImage.TYPE_INT_RGB,
300);
ImageIO.write(image, "png", pngOutputFile);
}
---------
If there is some change I can do in my code or some configuration to improve
some of these issues, then I would love to hear about it. As a comparison,
Ghost4j (with Ghostscript underneath) can handle these cases better. Even the
text under the logo in case 2 was less "pixely", with the same resolution.
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