[jira] [Created] (PDFBOX-4886) Regression: Images get blurry when rendering with 304 DPI (works fine with 2.0.19)

["Emmeran Seehuber (Jira)" <ji...@apache.org>]

Emmeran Seehuber created PDFBOX-4886:
----------------------------------------

             Summary: Regression: Images get blurry when rendering with 304 DPI (works fine with 2.0.19)
                 Key: PDFBOX-4886
                 URL: https://issues.apache.org/jira/browse/PDFBOX-4886
             Project: PDFBox
          Issue Type: Bug
          Components: Rendering
    Affects Versions: 2.0.20
            Reporter: Emmeran Seehuber
         Attachments: FlowerBompA6.pdf, image-2020-06-15-15-29-32-611.png, image-2020-06-15-15-29-33-208.png

There seems to be a regression when rendering a PDF to an high DPI image with PDFBox 2.0.20. Everything worked fine with PDFBox 2.0.19.

See the attached [^FlowerBompA6.pdf] file. The rendering is done using

{{}}{{PDFRenderer pdfRenderer = new PDFRenderer(doc);}}
{{BufferedImage bufferedImage = pdfRenderer.renderImageWithDPI(0, 304, ImageType.RGB);}}

 

I've build a small project to reproduce this problem:

[https://github.com/rototor/pdfbox-render-blurry]

Checkout this repository and run mvn clean test. You find a blurry rendering of the PDF as result in the target/test folder.

!image-2020-06-15-15-29-32-611.png!

Then change the PDFBox Version in the pom.xml to 2.0.19 and run mvn clean test again.
 The rendering of the flowers are now sharp.

!image-2020-06-15-15-29-33-208.png!

A test driver in a project of mine compares the resulting file sizes after exporting the image as JPGs. Because of the blurring the resulting file is way smaller then it used to be...

 



--
This message was sent by Atlassian Jira
(v8.3.4#803005)

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@pdfbox.apache.org
For additional commands, e-mail: dev-help@pdfbox.apache.org