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diff --git a/doc/filters.texi b/doc/filters.texi index c243caee20..0e10946cca 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -8131,6 +8131,35 @@ tblend=all_mode=grainextract @subsection Commands This filter supports same @ref{commands} as options. +@anchor{blockdetect} +@section blockdetect + +Determines blockiness of frames without altering the input frames. + +Based on Remco Muijs and Ihor Kirenko: "A no-reference blocking artifact measure for adaptive video processing." 2005 13th European signal processing conference. + +The filter accepts the following options: + +@table @option +@item period_min +@item period_max +Set minimum and maximum values for determining pixel grids (periods). +Default values are [3,24]. + +@item planes +Set planes to filter. Default is first only. +@end table + +@subsection Examples + +@itemize +@item +Determine blockiness for the first plane and search for periods within [8,32]: +@example +blockdetect=period_min=8:period_max=32:planes=1 +@end example +@end itemize + @anchor{blurdetect} @section blurdetect |