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https://issues.apache.org/jira/browse/PDFBOX-1223?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tilman Hausherr updated PDFBOX-1223:
------------------------------------
Labels: colorspaces convertToImage overprintcontrol rendering transparency
transparent (was: colorspaces convertToImage overprintcontrol rendering
transparent)
> Strange color issues with convertToImage method
> -----------------------------------------------
>
> Key: PDFBOX-1223
> URL: https://issues.apache.org/jira/browse/PDFBOX-1223
> Project: PDFBox
> Issue Type: New Feature
> Components: Rendering
> Affects Versions: 1.6.0
> Reporter: Jimi Hullegård
> Assignee: Andreas Lehmkühler
> Labels: colorspaces, convertToImage, overprintcontrol,
> rendering, transparency, transparent
> Fix For: 2.0.0
>
> Attachments: case1.pdf, case1.png, case2.pdf, case2.png, case3.pdf,
> case3.png, case4.png
>
>
> 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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