Am 24.12.2020 um 13:51 schrieb Paul B Mahol:
On Thu, Dec 24, 2020 at 12:25 PM Michael Koch <[email protected]>
wrote:
Am 24.12.2020 um 10:42 schrieb thongtm2:
I have a fisheye camera (360 degrees in horizontal & 180 degrees in
vertical). Is it possible to use v360 filter to dewarp circular fisheye
images to single perspective images (flatten fisheye images)? I've tried
many options but the results were not as I expected. Below command is
one of
them:
ffplay fisheye_video.mp4 -vf
v360=fisheye:ih_fov=360:iv_fov=180:flat:yaw=120:pitch=0:roll=0
There are several problems in your command line.
1. As Paul has already pointed out, ih_fov and iv_fov must have the same
value for fisheye input. In your case both must be 180.
2. It also makes sense to specify the output field of view h_fov and
v_fov and the output size w and h, because the default values aren't
known (unless you look in the source code).
3. The command line is better readable if you don't omit the names of
the options. I mean "output=flat". The names can be omitted if the
options are specified exactly in the correct order. Your command line
may work as it is, but it would be better if "flat" or "output=flat" is
the second option.
This should work:
v360=input=fisheye:output=flat:ih_fov=180:iv_fov=180:h_fov=90:v_fov=60:w=900:h=600:pitch=-60
I may be mistaken, but OP input looks to be 360 fisheye, I havent actually
tried.
May be. As I understood it, he has a normal fisheye lens which is
pointing up to the sky. Then he has 360° around the horizon (which is
the edge of the image circle) and the image diameter is 180°.
Michael
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