Hi,
planning to buy a Phantom Vision, although I get a bit scared of the things I read about battery problems, range problems and run-aways....
I know the footage will not be as good / stable as using a gopro/real gimbal, so I looked around to see how to improve on things a bit already...
I have downloaded some of the movies on youtube and tried various options.
Since the PV lens has a lot of distortion, any stabilizing will in most cases result in a wobble, or banana effect as someone named it.
My guess is that if you can transform the image to a perfect linear image, and after doing that, stabilize, the wobble will be much less, or even gone.
I don't have the PV yet, but I tried to find lens correction parameters of the video output by extracting some stills from rotating PV and stitching them with PTGui, and using paramaters from PTGui in this (free) de-fishing plugin in for Avisynth / VirtualDub:
http://forum.doom9.org/showthread.php?t=152860
What this does you can see in this Youtube Movie:
http://www.youtube.com/watch?v=B5fci53CD1A
Is used these parameters, but they are not perfect (need to have the PV and determine under controlled conditions):
ConvertToRGB32(matrix="PC.601").Defish(a=0.014490606, b=-0.075227731, c=-0.063813568, scaling="fitxy").ConvertToYUY2(matrix="PC.601") ## Vision Defished 2
Original:
De- Fished:
As you can se a lot of pixels (and field of view) get lost in the de-fishing process after filling the frame (no black borders), but your horizons will be straight, as other geometrical shapes.
Maybe this of use to you.
Ok, now to find a good US dealer willing to ship to Asia...
planning to buy a Phantom Vision, although I get a bit scared of the things I read about battery problems, range problems and run-aways....
I know the footage will not be as good / stable as using a gopro/real gimbal, so I looked around to see how to improve on things a bit already...
I have downloaded some of the movies on youtube and tried various options.
Since the PV lens has a lot of distortion, any stabilizing will in most cases result in a wobble, or banana effect as someone named it.
My guess is that if you can transform the image to a perfect linear image, and after doing that, stabilize, the wobble will be much less, or even gone.
I don't have the PV yet, but I tried to find lens correction parameters of the video output by extracting some stills from rotating PV and stitching them with PTGui, and using paramaters from PTGui in this (free) de-fishing plugin in for Avisynth / VirtualDub:
http://forum.doom9.org/showthread.php?t=152860
What this does you can see in this Youtube Movie:
http://www.youtube.com/watch?v=B5fci53CD1A
Is used these parameters, but they are not perfect (need to have the PV and determine under controlled conditions):
ConvertToRGB32(matrix="PC.601").Defish(a=0.014490606, b=-0.075227731, c=-0.063813568, scaling="fitxy").ConvertToYUY2(matrix="PC.601") ## Vision Defished 2
Original:
De- Fished:
As you can se a lot of pixels (and field of view) get lost in the de-fishing process after filling the frame (no black borders), but your horizons will be straight, as other geometrical shapes.
Maybe this of use to you.
Ok, now to find a good US dealer willing to ship to Asia...