ICEpdf
  1. ICEpdf
  2. PDF-183

Device CMYK incorrectly applied to DCTDecode image stream.

    Details

    • Type: Bug Bug
    • Status: Closed
    • Priority: Minor Minor
    • Resolution: Fixed
    • Affects Version/s: 4.0
    • Fix Version/s: 4.2
    • Component/s: Core/Parsing
    • Labels:
      None
    • Environment:
      Any

      Description

      This has bean a long standing bug with how we apply CMYK colour model to some image types. There is foot note in the 4.8.5 Masked Images section that might shed some light on the problem. The PDF in question showd the images as being very blue as as I result I suspect the colour model might be incorrectly applied.

      Here is a sample of the image dictionary that is likely responsible for the issue.

      /Intent/RelativeColorimetric
      /Subtype/Image
      /Length 64768
      /Filter/DCTDecode/
      Name/X/
      BitsPerComponent 8
      /ColorSpace/DeviceCMYK
      /Width 465
      /Height 349
      /Type/XObject
      1. _61SPB01_CMJN_20100505_S1001639.pdf
        405 kB
        Patrick Corless
      2. p4.pdf
        3.36 MB
        Patrick Corless

        Activity

        Patrick Corless created issue -
        Patrick Corless made changes -
        Field Original Value New Value
        Salesforce Case []
        Fix Version/s 4.1 [ 10227 ]
        Assignee Patrick Corless [ patrick.corless ] Mark Collette [ mark.collette ]
        Patrick Corless made changes -
        Patrick Corless made changes -
        Salesforce Case []
        Fix Version/s 4.1.1 [ 10244 ]
        Fix Version/s 4.1 [ 10227 ]
        Show
        Patrick Corless added a comment - From http://www.icefaces.org/JForum/posts/list/17351.page .
        Patrick Corless made changes -
        Attachment p4.pdf [ 12489 ]
        Patrick Corless made changes -
        Salesforce Case []
        Fix Version/s 4.2 [ 10243 ]
        Fix Version/s 4.1.1 [ 10244 ]
        Hide
        Patrick Corless added a comment -

        I'll see I I can't tweak the dark levels a little bit more.

        Show
        Patrick Corless added a comment - I'll see I I can't tweak the dark levels a little bit more.
        Patrick Corless made changes -
        Workaround Description ICEpdf 4.1.3 uses a new CYMK colour space converter. Image are still a little dark but overall image quality has be greatly improved.
        Salesforce Case []
        Priority Major [ 3 ] Minor [ 4 ]
        Patrick Corless made changes -
        Salesforce Case []
        Assignee Priority P1
        Hide
        Patrick Corless added a comment -

        The cmyk levels where tweaked a bit for 4.1.2 for a client (p4.pdf). The other image in question (_61SPB01_CMJN_20100505_S1001639.pdf) had a few images that didn't look right related to the YCCK colour model which was fixed in PDF-247.

        Closing issue.

        Show
        Patrick Corless added a comment - The cmyk levels where tweaked a bit for 4.1.2 for a client (p4.pdf). The other image in question (_61SPB01_CMJN_20100505_S1001639.pdf) had a few images that didn't look right related to the YCCK colour model which was fixed in PDF-247 . Closing issue.
        Patrick Corless made changes -
        Status Open [ 1 ] Resolved [ 5 ]
        Resolution Fixed [ 1 ]
        Ken Fyten made changes -
        Status Resolved [ 5 ] Closed [ 6 ]

          People

          • Assignee:
            Mark Collette
            Reporter:
            Patrick Corless
          • Votes:
            0 Vote for this issue
            Watchers:
            0 Start watching this issue

            Dates

            • Created:
              Updated:
              Resolved: