avfilter: add erosion, dilation, deflate & inflate filter

Signed-off-by: Paul B Mahol <onemda@gmail.com>

1 files changed, 90 insertions, 0 deletions

diff --git a/doc/filters.texi b/doc/filters.texi
index 9f7b976d2a..2679090067 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -3718,6 +3718,24 @@ Set whether or not chroma is considered in the metric calculations. Default is
 @code{1}.
 @end table
 
+@section deflate
+
+Apply deflate effect to the video.
+
+This filter replaces the pixel by the local(3x3) average by taking into account
+only values lower than the pixel.
+
+It accepts the following options:
+
+@table @option
+@item threshold0
+@item threshold1
+@item threshold2
+@item threshold3
+Allows to limit the maximum change for each plane, default is 65535.
+If 0, plane will remain unchanged.
+@end table
+
 @section dejudder
 
 Remove judder produced by partially interlaced telecined content.
@@ -3904,6 +3922,33 @@ A number representing position of the first frame with respect to the telecine
 pattern. This is to be used if the stream is cut. The default value is @code{0}.
 @end table
 
+@section dilation
+
+Apply dilation effect to the video.
+
+This filter replaces the pixel by the local(3x3) maximum.
+
+It accepts the following options:
+
+@table @option
+@item threshold0
+@item threshold1
+@item threshold2
+@item threshold3
+Allows to limit the maximum change for each plane, default is 65535.
+If 0, plane will remain unchanged.
+
+@item coordinates
+Flag which specifies the pixel to refer to. Default is 255 i.e. all eight
+pixels are used.
+
+Flags to local 3x3 coordinates maps like this:
+
+    1 2 3
+    4   5
+    6 7 8
+@end table
+
 @section drawbox
 
 Draw a colored box on the input image.
@@ -4759,6 +4804,33 @@ value.
 
 @end table
 
+@section erosion
+
+Apply erosion effect to the video.
+
+This filter replaces the pixel by the local(3x3) minimum.
+
+It accepts the following options:
+
+@table @option
+@item threshold0
+@item threshold1
+@item threshold2
+@item threshold3
+Allows to limit the maximum change for each plane, default is 65535.
+If 0, plane will remain unchanged.
+
+@item coordinates
+Flag which specifies the pixel to refer to. Default is 255 i.e. all eight
+pixels are used.
+
+Flags to local 3x3 coordinates maps like this:
+
+    1 2 3
+    4   5
+    6 7 8
+@end table
+
 @section extractplanes
 
 Extract color channel components from input video stream into
@@ -6356,6 +6428,24 @@ Default value is @code{none}.
 Swap luma/chroma/alpha fields. Exchange even & odd lines. Default value is @code{0}.
 @end table
 
+@section inflate
+
+Apply inflate effect to the video.
+
+This filter replaces the pixel by the local(3x3) average by taking into account
+only values higher than the pixel.
+
+It accepts the following options:
+
+@table @option
+@item threshold0
+@item threshold1
+@item threshold2
+@item threshold3
+Allows to limit the maximum change for each plane, default is 65535.
+If 0, plane will remain unchanged.
+@end table
+
 @section interlace
 
 Simple interlacing filter from progressive contents. This interleaves upper (or