1 Reply Latest reply on Apr 28, 2016 3:24 PM by joaopedro1923

    GPU-version of Gaussian Blur sometimes produces visible ringing artifacts on high contrast images

    P.Stelzer Level 1



      I noticed some annoying ringing artifacts in my footage after applying the GaussianBlur() from the PrSDKGPUImageProcessingSuite.


      I assume the blur implementation is the same as in the 'Gaussian Blur' Video Effect. So I tested with that effect standalone and was able reproduce the problem.

      The ringing artifacts appear in high contrasted footage (see screenshots) and only with the GPU-version of the blur.

      Switching to software-only renderer and therefore enforcing the CPU-version of the effect removes the artifacts.


      Has anybody already noticed this issue?






      Gaussian Blur (CPU) without artifacts:



      Gaussian Blur (GPU) with artifacts: