Graphics Reference
In-Depth Information
Single-Point Tracking
This is the most basic form of Motion Tracking where the system follows a
single feature - a closely focused area of the image that changes location from
frame to frame. The easiest features to track are highly contrasting clusters of
pixels, where they maintain their contrast throughout their motion track path
(i.e. eyes, corners of windows, computer screen edges, light bulbs).
The image below shows two examples of tracking features, both good and
bad. The concrete has very low contrast and little for the tracking target to lock
on to, whereas the cute little girl has many great features to track.
Single-Point Tracking will often be used for applying visual effects (lens flares,
glows, and character thought bubbles).
Open
Motion Tracking.aep
and select
Pulp Mill
-
Stabilization
. We'll be using
this shot for two purposes: Single-Point Tracking exercise and Multi-Point
Tracking for Stabilization.