Uploaded image for project: 'PDFBox'
  1. PDFBox
  2. PDFBOX-4516

PDFBox text and images are blurry even after rendering with high DPI

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Details

    • Bug
    • Status: Closed
    • Major
    • Resolution: Fixed
    • 2.0.15, 2.0.19
    • 2.0.20, 3.0.0 PDFBox
    • Rendering
    • Oracle Java 8 update125 on both Mac OS X and centos

    Description

      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

      Attachments

        1. Screenshot-PDFBOX-1359.pdf-page17.png
          402 kB
          Tilman Hausherr
        2. PDFBOX-4815-dithered-stencil-better-72dpi.jpg
          1.34 MB
          Tilman Hausherr
        3. PDFBOX-4815-dithered-stencil-better-36dpi.jpg
          66 kB
          Tilman Hausherr
        4. PDFBOX-4815-dithered-stencil-bad-72dpi.jpg
          4.87 MB
          Tilman Hausherr
        5. PDFBOX-4815-dithered-stencil-bad-36dpi.jpg
          147 kB
          Tilman Hausherr
        6. PDFBOX-4815-dithered-stencil.pdf
          3.20 MB
          Tilman Hausherr
        7. PDFBOX-4516-output-improved.png
          22 kB
          Tilman Hausherr
        8. PDFBOX-4516-output-default.png
          10 kB
          Tilman Hausherr
        9. PDFBOX-4516-better-72dpi.jpg
          269 kB
          Tilman Hausherr
        10. PDFBOX-4516-59.png
          512 kB
          Tilman Hausherr
        11. PDFBox4516.java
          3 kB
          Tilman Hausherr
        12. PDFBOX-4516_TvT-better-72dpi.jpg
          55 kB
          Tilman Hausherr
        13. PDFBOX-4516_TvT.pdf
          38 kB
          Tilman Hausherr
        14. original.pdf
          273 kB
          Jack
        15. lowDPI.png
          19 kB
          Jack
        16. highDPI.png
          161 kB
          Jack
        17. defaultDPI.png
          58 kB
          Jack

        Issue Links

          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. PDFBOX-4527 poor conversion quality on this PDF when dpi is not high enough

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. PDFBOX-4815 Gray background preview becomes black squares

          • Major - Major loss of function.
          • Closed
          is related to

          Bug - A problem which impairs or prevents the functions of the product. PDFBOX-5378 Slow rendering due to rescaling

          • Major - Major loss of function.
          • Open

          Bug - A problem which impairs or prevents the functions of the product. PDFBOX-4917 Images are blurry after updating to 2.0.20

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. PDFBOX-4863 Bitmapped fonts are rendered very blurry

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. PDFBOX-4930 Font thickness issue when we use PDFBox for generating images from PDF

          • Major - Major loss of function.
          • Closed

          Activity

            People

              tilman Tilman Hausherr
              jiangyurong609 Jack
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              Dates

                Created:
                Updated:
                Resolved: