Graphics Programs Reference
In-Depth Information
This tab offers several controls that can help reach a better solve.
•
FocalLengthType:
If you know anything about the focal length that was
used when shooting, you can enter it here.
•
FilmBackSize:
Thisisthesizeofthesensorusedforcapturingtheimage.
The sensor can be the size of the camera's back in a film camera, or the
size of the CCD in a digital camera. If exact scale doesn't matter in the
end result of your track—that is, if you don't need to match to a specific
real-world scale—then a ratio such as 4:3 or 2:1 will be enough, depend-
ing on your format.
•
CameraMotion:
This property is similar to the Track Validation property
in the Tracking tab. If you know that the camera is a free (moving) one
rather than a nodal (stationary tripod) one, choose it here so that the solve
knows what it's looking for.
I know this shot was taken with a Panasonic HVX-200 camera. I know the zoom
didn't change, but I don't know what the focal length was. Aside from what you
see with your own eyes, this kind of information is not always available. This is
one of the reasons VFX supervisors go on set—to jot down all this kind of in-
formation.
Search WWH ::
Custom Search