UM:Predictive Tracking

From DigitalVision
Revision as of 11:06, 15 October 2014 by Alastair (talk | contribs) (Text replacement - "|Platform:" to "|UM:")

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search

Darrow-up.png     Previous Next

Predictive Tracking

ch-feature-tracker-predict-off

 

Normally, if the tracking calculation fails at some point in a shot, tracking stops. In some cases, it is apparent that the track path could simply carry on as before, the path being extrapolated based on its previous history.

 

ch-feature-tracker-path-predict-diag

 

If tracking fails because our tracked feature loses definition or goes out of camera, we can enable Predict Tracking at this point.

 

When we resume tracking, the track path is calculated such that it smoothly continues along the same path as calculated previously.

 

ch-feature-tracker-predict-ex-1

1: Tracking ...

ch-feature-tracker-predict-ex-2

2: Feature reaches edge of frame. Turn Predict Tracking ON.

ch-feature-tracker-predict-ex-3

3: Feature off camera but track path is extrapolated.

ch-feature-tracker-predict-ex-4

Track path extrapolation continues.

 

Darrow-up.png     Previous Next