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doc/filters: correct name for guided filter

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Note input requirements and reword option sub description.
This commit is contained in:
Gyan Doshi
2021-05-13 19:05:12 +05:30
parent f119d7526e
commit c122a6c10d
1 changed files with 6 additions and 5 deletions
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doc/filters.texi
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@ -12957,8 +12957,10 @@ greyedge=difford=1:minknorm=0:sigma=2
@end itemize
@section guided filter
@section guided
Apply guided filter for edge-preserving smoothing, dehazing and so on.
This filter requires two inputs of same resolution and pixel format.
The second input serves as the reference.
The filter accepts the following options:
@table @option
@ -12975,10 +12977,9 @@ Set filter mode. Can be @code{basic} or @code{fast}.
Default is @code{basic}.
@item sub
Set subsampling ratio.
Allowed range is 1 to 64.
Default is always 1 for @code{basic} value of @var{mode} option,
and 4 for @code{fast} value of @var{mode} option.
Set subsampling ratio for @code{fast} mode.
Allowed effective range is 2 to 64. Default is 4.
No subsampling occurs in @code{basic} mode.
@item planes
Set planes to filter. Default is first only.