diff options
author | Thomas Mundt <tmundt75@gmail.com> | 2017-04-21 00:33:39 +0300 |
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committer | James Almer <jamrial@gmail.com> | 2017-05-02 20:09:50 +0300 |
commit | 2da5bf4c2f4cb878bad794be2b76108afbbd899d (patch) | |
tree | 509008cb5a54e60151674017dae6c88bdcd9d6a7 /doc | |
parent | 20da4135020fdf66f6060bb14926befbcc42a7dd (diff) |
avfilter/interlace: add complex vertical low-pass filter
This complex (-1 2 6 2 -1) filter slightly less reduces interlace 'twitter' but better retain detail and subjective sharpness impression compared to the linear (1 2 1) filter.
Signed-off-by: Thomas Mundt <tmundt75@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
Diffstat (limited to 'doc')
-rw-r--r-- | doc/filters.texi | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index 119e7474a5..f431274f0f 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -9158,8 +9158,21 @@ This determines whether the interlaced frame is taken from the even (tff - default) or odd (bff) lines of the progressive frame. @item lowpass -Enable (default) or disable the vertical lowpass filter to avoid twitter -interlacing and reduce moire patterns. +Vertical lowpass filter to avoid twitter interlacing and +reduce moire patterns. + +@table @samp +@item 0, off +Disable vertical lowpass filter + +@item 1, linear +Enable linear filter (default) + +@item 2, complex +Enable complex filter. This will slightly less reduce twitter and moire +but better retain detail and subjective sharpness impression. + +@end table @end table @section kerndeint @@ -13857,17 +13870,23 @@ Available value for @var{flags} is: @table @option @item low_pass_filter, vlfp -Enable vertical low-pass filtering in the filter. +Enable linear vertical low-pass filtering in the filter. Vertical low-pass filtering is required when creating an interlaced destination from a progressive source which contains high-frequency vertical detail. Filtering will reduce interlace 'twitter' and Moire patterning. +@item complex_filter, cvlfp +Enable complex vertical low-pass filtering. +This will slightly less reduce interlace 'twitter' and Moire +patterning but better retain detail and subjective sharpness impression. + +@end table + Vertical low-pass filtering can only be enabled for @option{mode} @var{interleave_top} and @var{interleave_bottom}. @end table -@end table @section transpose |