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https://issues.apache.org/jira/browse/PDFBOX-4918?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tilman Hausherr updated PDFBOX-4918:
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Attachment: sample_bilevel_raster-21.png
> PDFRenderer.renderImageWithDPI DPI parameter ignored in 2.0.20
> ---------------------------------------------------------------
>
> Key: PDFBOX-4918
> URL: https://issues.apache.org/jira/browse/PDFBOX-4918
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 2.0.20
> Environment: x64 windows. several 64-bit Java 8 JREs
> Reporter: chris laws
> Priority: Major
> Attachments: 2.0.0.png, 2.0.1.png, 2.0.10.png, 2.0.11.png,
> 2.0.12.png, 2.0.13.png, 2.0.14.png, 2.0.15.png, 2.0.16.png, 2.0.17.png,
> 2.0.18.png, 2.0.19.png, 2.0.2.png, 2.0.20.png, 2.0.3.png, 2.0.4.png,
> 2.0.5.png, 2.0.6.png, 2.0.7.png, 2.0.8.png, 2.0.9.png,
> sample_bilevel_raster-21.png, sample_bilevel_raster.pdf
>
>
> org.apache.pdfbox.rendering.PDFRenderer.renderImageWithDPI method no longer
> correctly renders pixels in a raster graphic PDF at the resolution requested.
> PDFRenderer pdfRenderer = new PDFRenderer(PDDocument.load(new
> File("sample_bilevel_raster.pdf")));
> BufferedImage bi = pdfRenderer.renderImageWithDPI(0, 300, ImageType.RGB);
> javax.imageio.ImageIO.write(bim, "PNG", new File("my png filename));
> I tested this with all Pdfbox 2 releases (2.0.0 - 2.0.20) and found this bug
> only affecting 2.0.20. 2.0.0-2.0.19 produced correct output.
> it appears v20 renders onto a destination image of the correct size but the
> source image is set at 72 DPI causing the destination pixels to be
> extrapolated gray-scale.
> This is reproducible with any bi-level raster PDF I used. See attached input
> and output files.
>
>
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