ICEpdf
  1. ICEpdf
  2. PDF-475

CMYK colour conversion is a little dark

          Details

          • Type: Bug Bug
          • Status: Closed
          • Priority: Major Major
          • Resolution: Fixed
          • Affects Version/s: 4.3.3
          • Fix Version/s: 4.3.4
          • Component/s: Core/Parsing
          • Labels:
            None
          • Environment:
            any

            Description


            The sample PDF renders without error but the green back ground is quite a bit darker then what acrobat renders. The PDF uses a fairly complex colour model but after double checking the logic I think we are looking at a standard issues with CMYK to RGB colour conversion. The conversion process tends to generate darking colours then adobe.

              

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              Patrick Corless added a comment - - edited

              Update the DeviceCMYK conversion logic to match what we are doing in the stream class for image conversion. The basic idea behind the conversion tweak is to reduce the black or Y by about a third to give a better overall colour conversion to rgb.

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              Patrick Corless added a comment - - edited Update the DeviceCMYK conversion logic to match what we are doing in the stream class for image conversion. The basic idea behind the conversion tweak is to reduce the black or Y by about a third to give a better overall colour conversion to rgb.

                People

                • Assignee:
                  Patrick Corless
                  Reporter:
                  Patrick Corless
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                  • Created:
                    Updated:
                    Resolved: