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https://issues.apache.org/jira/browse/PDFBOX-3478?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15456465#comment-15456465
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John Hewson commented on PDFBOX-3478:
-------------------------------------
If you render at a low DPI, lines < 1px thick may disappear. This is just how
Java 2D graphics work. Workaround is to render at a higher resolution and
downscale using bicubic or some other high-quality scaling.
> Uploaded PDF Table Formatting Missing Vertical Lines
> ----------------------------------------------------
>
> Key: PDFBOX-3478
> URL: https://issues.apache.org/jira/browse/PDFBOX-3478
> Project: PDFBox
> Issue Type: Bug
> Reporter: RuhongCai
> Attachments: table_without_lines.pdf
>
>
> The attached file "table_without_lines.pdf"
> BufferedImage image= new PDFImages( "C:\\temp\\table_without_lines.pdf",
> null).getPageImage(0, 108);
> FileOutputStream outputStream = new FileOutputStream(
> "C:\\temp\\image-1.png" );
> ImageIO.write( image, "png", outputStream );
> The image "image-1.png" shows table missing Vertical Lines
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