View Invariant Characteristics
of Actions
•Number of instants.
–Similar actions have same number of dynamic instants.
•Sign of instant.
–Sign is defined by the angle of a instant. Turning right is ‘+’, and turning left is ‘-.’
–The sign of an instant i will remain the same if the camera view will not cross the plane containing instant i-1,i,and i+1.
-
+
+
We will show the sign of instant is view invariant in the later slides.