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| -rw-r--r-- | doc/filters.texi | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index b15087c0e1..b0ea2ca2ca 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -4629,6 +4629,29 @@ The coordinates of the current sample. The width and height of the image. @end table +@subsection Examples + +@itemize +@item +High-pass: +@example +fftfilt=dc_Y=128:weight_Y='squish(1-(Y+X)/100)' +@end example + +@item +Low-pass: +@example +fftfilt=dc_Y=0:weight_Y='squish((Y+X)/100-1)' +@end example + +@item +Sharpen: +@example +fftfilt=dc_Y=0:weight_Y='1+squish(1-(Y+X)/100)' +@end example + +@end itemize + @section field Extract a single field from an interlaced image using stride |