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From "Tilman Hausherr (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PDFBOX-4516) PDFBox text and images are blurry even after rendering with high DPI
Date Thu, 18 Apr 2019 17:40:00 GMT

    [ https://issues.apache.org/jira/browse/PDFBOX-4516?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16821342#comment-16821342
] 

Tilman Hausherr commented on PDFBOX-4516:
-----------------------------------------

Here's some code and its output. It shows the best possible rendering hints and the smallest
two lines are still bad.

> PDFBox text and images are blurry even after rendering with high DPI
> --------------------------------------------------------------------
>
>                 Key: PDFBOX-4516
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-4516
>             Project: PDFBox
>          Issue Type: Bug
>          Components: Rendering
>    Affects Versions: 2.0.15
>         Environment: Oracle Java 8 update125 on both Mac OS X and centos
>            Reporter: Jack
>            Priority: Critical
>              Labels: bug
>         Attachments: PDFBOX-4516-59.png, PDFBOX-4516-output-default.png, PDFBOX-4516-output-improved.png,
PDFBox4516.java, defaultDPI.png, highDPI.png, lowDPI.png, original.pdf
>
>
> I tried to render image with different DPI, found PDFBOX performs poorly on the input
pdf file, I have to put a very high DPI to get a reasonable good image. Could anyone pls help
take a look?  Thanks



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