[FFmpeg-trac] #9947(undetermined:new): Misbehaving Curves Filter

FFmpeg trac at avcodec.org
Tue Sep 27 19:00:50 EEST 2022

#9947: Misbehaving Curves Filter
             Reporter:  kesh         |                    Owner:  (none)
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  unspecified  |               Resolution:
             Keywords:  curves       |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
Comment (by kesh):

 IMHO, it appears that
 PCHIP 1-D monotonic cubic interpolation] produces a curve much like GIMP.
 Here is the PCHIP curve of the presented case over the FFmpeg curve:


 Based on what I've seen online, this interpolation algorithm may very well
 be what Photoshop uses.
Ticket URL: <https://trac.ffmpeg.org/ticket/9947#comment:3>
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