Add a parameter (boolean) r to switch the area from
rectangular (r=0) to circular(r=1) delogo.
Signed-off-by: Jörg Habenicht
---
libavfilter/vf_delogo.c | 7 ---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/libavfilter/vf_delogo.c b/libavfilter/vf_delogo.c
index bfbf8e6f4c.
Dear list,
I made a patch for the delogo filter. With this I can create a circular
or elliptic zone to apply the delogo algorithm. The borders are defined with
x,y,w,h parameter just like the rectangular area definition. To become
circular I added an additional parameter 'r'=0/1 defaulting to '0'
Added a description of the elliptic formed delogo algorithm. Placed it
outside the doxygen function comment.
Signed-off-by: Jörg Habenicht
---
libavfilter/vf_delogo.c | 24
1 file changed, 24 insertions(+)
diff --git a/libavfilter/vf_delogo.c b/libavfilter/vf_delogo.c
Use the corrected x,y,w,h values with boundaries and clipping to
calculate the points inside the ellipse.
Signed-off-by: Jörg Habenicht
---
libavfilter/vf_delogo.c | 28 ++--
1 file changed, 26 insertions(+), 2 deletions(-)
diff --git a/libavfilter/vf_delogo.c b/libavfi
Dear list,
sorry for the previous posting. I noticed the lines got mangled. So here
is a new try to get the patches right.
Old text:
I made a patch for the delogo filter. With this I can create a circular or
elliptic zone to apply the delogo algorithm. The borders are defined with
x,y,w,h parame
Use the corrected x,y,w,h values with boundaries and clipping to
calculate the points inside the ellipse.
Signed-off-by: Jörg Habenicht
---
libavfilter/vf_delogo.c | 28 ++--
1 file changed, 26 insertions(+), 2 deletions(-)
diff --git a/libavfilter/vf_delogo.c b/libavfil
Added a description of the elliptic formed delogo algorithm. Placed it
outside the doxygen function comment.
Signed-off-by: Jörg Habenicht
---
libavfilter/vf_delogo.c | 24
1 file changed, 24 insertions(+)
diff --git a/libavfilter/vf_delogo.c b/libavfilter/vf_delogo.c
i
Add a parameter (boolean) r to switch the area from
rectangular (r=0) to circular(r=1) delogo.
Signed-off-by: Jörg Habenicht
---
libavfilter/vf_delogo.c | 7 ---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/libavfilter/vf_delogo.c b/libavfilter/vf_delogo.c
index bfbf8e6f4c..
Changed the delogo area to a definition of a superellipse. See here
https://en.wikipedia.org/wiki/Superellipse
Changed the meaning of the parameter 'r'.
'r' = 0.0 resolves to a rectangular area.
0 <'r' < 1 resolves to a star with concave sides.
'r' = 1.0 resolves to a rhombus.
1 < 'r' < 2 resolves
Dear list,
with help from Michael I extended the ellipse area to a superellipse.
The user parameter 'r' has changed to become a float value.
Values 0 < r < 1 the area looks like a four edge star.
Value r = 1 the area get a rhombus.
Values 1 < r < 2 the area is a rhombus with concave sides.
Value
Changed the type of the parameter 'r' from int to float. To be able to
flex the area as superellipse from rounded rectangle ('r' > 2.0) to a
concave shaped star ('r' < 1.0).
Check the input value to be 'r' >= 0.0, else error exit
Signed-off-by: Jörg Habenicht
---
libavfilter/vf_delogo.c | 21 +++
Changed the delogo area to a definition of a superellipse. See here
https://en.wikipedia.org/wiki/Superellipse
Changed the meaning of the parameter 'r'.
'r' = 0.0 resolves to a rectangular area.
0 <'r' < 1 resolves to a star with concave sides.
'r' = 1.0 resolves to a rhombus.
1 < 'r' < 2 resolves
Changed the type of the parameter 'r' from int to float. To be able to
flex the area as superellipse from rounded rectangle ('r' > 2.0) to a
concave shaped star ('r' < 1.0).
Check the input value to be 'r' >= 0.0, else error exit
Signed-off-by: Jörg Habenicht
---
libavfilter/vf_delogo.c | 21 +++
Version 2 of the pathset. One test "if (isnan(yf))" was missing.
Corrected in this version
with help from Michael I extended the ellipse area to a superellipse.
The user parameter 'r' has changed to become a float value.
Values 0 < r < 1 the area looks like a four edge star.
Value r = 1 the area
Hi
Am 06.02.25 um 18:12 schrieb Michael Niedermayer:
> Hi Jörg
>
> On Tue, Feb 04, 2025 at 08:53:58PM +0100, Jörg Habenicht via ffmpeg-devel
> wrote:
>> Add a parameter (boolean) r to switch the area from
>> rectangular (r=0) to circular(r=1) delogo.
>>
[...]
>&
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