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https://issues.apache.org/jira/browse/PDFBOX-5553?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17649949#comment-17649949
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Tilman Hausherr commented on PDFBOX-5553:
-----------------------------------------
>From SampledImageReader.java:
{code}
final int invert = colorSpace instanceof PDIndexed || decode[0] < decode[1] ? 0
: -1;
{code}
The image has both, it is indexed *and* has an "inverted" decode. So unless the
specification sees this differently (I'll look tomorrow), we should invert
twice, i.e. not invert at all.
> PDFRenderer resulting image has black background
> ------------------------------------------------
>
> Key: PDFBOX-5553
> URL: https://issues.apache.org/jira/browse/PDFBOX-5553
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 2.0.27
> Reporter: Joseph Jezerinac
> Priority: Major
> Attachments: black-background.pdf
>
>
> Using the attached PDF as the pdf, the resulting png has a black ground using
> the code below. Opening this PDF in reader or chrome etc., the background is
> white.
> {code:java}
> PDDocument pdDocument = PDDocument.load(pdf,
> MemoryUsageSetting.setupMixed(1024 * 1024 * 56));
> try { BufferedImage image = new
> PDFRenderer(pdDocument).renderImageWithDPI(0, 300, ImageType.RGB);
> ImageIO.write(image, "png", new File("bad-black-background.png"));
> } finally {
> pdDocument.close();
> } {code}
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