ICEpdf
  1. ICEpdf
  2. PDF-306

YCCK2BGRA colour conversion is too dark.

          Details

          • Type: Bug Bug
          • Status: Closed
          • Priority: Major Major
          • Resolution: Fixed
          • Affects Version/s: 4.2.1
          • Fix Version/s: 4.2.2
          • Component/s: Core/Parsing
          • Labels:
            None
          • Environment:
            any

            Description

            This PDF came in from a client. The file in question has several jpeg images that show up too dark. At first look it appears the fudge we use to converst a YCCK colour space to RGB is a little off and produces an image that is too dark. I have to do a little more investigation but we should be able to fix this.

              Activity

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              Patrick Corless created issue -
              Arran Mccullough made changes -
              Field Original Value New Value
              Salesforce Case [5007000000Gu96k]
              Repository Revision Date User Message
              ICEsoft Public SVN Repository #24886 Thu Jun 23 12:24:41 MDT 2011 patrick.corless PDF-306 revisited YCCK2BGRA algorthm to try and lighten up resulting image.
              Files Changed
              Commit graph MODIFY /icepdf/trunk/icepdf/core/src/org/icepdf/core/pobjects/Stream.java
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              Patrick Corless added a comment -

              Altered the YCCK to BGRA conversion to more closely match the adobe conversion for CCIR Rec. 601-1 standard. I removed the our Y tweak in favour of just leaving Y alone. Still kept to custom mods which make the resulting images a bit blue.

              The image in question is still not as dark as adobe but the correct contrast and images shapes can be seen.

              Show
              Patrick Corless added a comment - Altered the YCCK to BGRA conversion to more closely match the adobe conversion for CCIR Rec. 601-1 standard. I removed the our Y tweak in favour of just leaving Y alone. Still kept to custom mods which make the resulting images a bit blue. The image in question is still not as dark as adobe but the correct contrast and images shapes can be seen.
              Patrick Corless made changes -
              Status Open [ 1 ] Resolved [ 5 ]
              Resolution Fixed [ 1 ]
              Ken Fyten made changes -
              Status Resolved [ 5 ] Closed [ 6 ]

                People

                • Assignee:
                  Patrick Corless
                  Reporter:
                  Patrick Corless
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                  Dates

                  • Created:
                    Updated:
                    Resolved: