ICEpdf
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  2. PDF-249

IText 5.03 incorrectly specifying CCITTFax image K value

          Details

          • Type: Bug Bug
          • Status: Closed
          • Priority: Major Major
          • Resolution: Fixed
          • Affects Version/s: 4.1.2
          • Fix Version/s: 4.1.3
          • Component/s: Core/Parsing
          • Labels:
            None
          • Environment:
            any

            Description

            Recently we've been seeing quite a few malformed PDF documents generated with iText. In this particular case the CCITTFax image is encoded with the wrong K value and as a result we don't decode the image using the correct algorithm.

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              Patrick Corless added a comment -

              Added a try catch around the code that matches a K value to a ccittfax algorithm. If an error occurs while decoding the image the fall back code will try the T6 algorithm as a last resort. The PDF in question has the wrong K value but using T6 renders the image. This fix is a work around for the iText encoding issue.

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              Patrick Corless added a comment - Added a try catch around the code that matches a K value to a ccittfax algorithm. If an error occurs while decoding the image the fall back code will try the T6 algorithm as a last resort. The PDF in question has the wrong K value but using T6 renders the image. This fix is a work around for the iText encoding issue.

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                • Assignee:
                  Patrick Corless
                  Reporter:
                  Patrick Corless
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                  Dates

                  • Created:
                    Updated:
                    Resolved: