CIFilter Problems Under Leopard

  • Is anyone else having trouble with CIFilters producing "poor" images
    when running under Leopard?

    For example, I have an image scaling routine that first applies a
    CILanczosScaleTransform, then applies a CIUnsharpMask filter to
    sharpen up the scaled down image. The CIUnsharpMask filter produces
    black lines around the image. Removing the CIUnsharpMask filter fixes
    the problem.

    I have similar results with other filters such as brightness,
    contrast, exposure, etc. All of these filters seemed to work perfectly
    under Tiger.
  • Hi Robert,

    I have no difference in image quality using simple color adjusting
    filters. I am not sure how the UnsharpMask filter kernel looks like,
    but is it possible that the filter increases the image size according
    to its input radius and such? GaussianBlur is doing that for sure.

    another good source of information, where you could post your request
    is the Quartz-Dev mailinglist at <quartz-dev...>

    Cheers
    Volker

    Am 13.11.2007 um 05:49 schrieb Robert McCullough:

    > Is anyone else having trouble with CIFilters producing "poor"
    > images when running under Leopard?
    >
    > For example, I have an image scaling routine that first applies a
    > CILanczosScaleTransform, then applies a CIUnsharpMask filter to
    > sharpen up the scaled down image. The CIUnsharpMask filter produces
    > black lines around the image. Removing the CIUnsharpMask filter
    > fixes the problem.
    >
    > I have similar results with other filters such as brightness,
    > contrast, exposure, etc. All of these filters seemed to work
    > perfectly under Tiger.
previous month november 2007 next month
MTWTFSS
      1 2 3 4
5 6 7 8 9 10 11
12 13 14 15 16 17 18
19 20 21 22 23 24 25
26 27 28 29 30    
Go to today