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
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 +++
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 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
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.
>>
[...]
>&
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..
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
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
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.
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,
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'
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