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

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

    XMLWordPrintableJSON

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

        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
              Votes:
              0 Vote for this issue
              Watchers:
              7 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved: