< Previous | Contents | Manuals Home | Boris FX | Next >
If your planar tracker goes off course and wanders away, or switches to a somewhat different version of the search pattern, here's a checklist to examine.
shot prediction mode—should it be set to hand-held, ie is it a bouncy shot?
search size— (very common!) if the search size is too small, sporadic bumps in the shot will often cause loss of track, or a pattern that inexplicably changes to a somewhat different version.
obscuring objects—if other significant objects come between the camera and the tracked object, they should be masked out, see Masking.
poor contrast—if the pattern has little monochrome contrast, you may need to switch to specific channel or full RGB processing, see Channel Selection.
pattern has only fine detail—if the search pattern is mainly fine lines such as text, you may need to switch to High Detail mode.
rotation—if the shot suddenly "goes dutch" and spins, or an object being tracked spins rapidly around the axis facing it, increase the rotation rate search parameter.
zoom shots—the default scaling change parameter is intended for slow changes. If there is a crash zoom, increase the scaling rate search parameter.
If the tracker mini-view shows an interior that slowly shifts in some direction over the length of the shot
the tracked surface isn't flat (a recessed door, say). The interior may need to be masked out (see Masking)
the field of view defined by the main frame corners isn't correct. The corner locations should be adjusted, possibly by adjusting the Own FOV spinner.
©2023 Boris FX, Inc. — UNOFFICIAL — Converted from original PDF.