Paper describes that a 2D signal(say video) can be projected to 1D for time series analysis by using a transformation function
Ax , Ay represents the
(x,y) coordinates of a single
trajectory A. Then,these
fx vs t can be plotted and various analysis can be performed. Going by their justification,is it logical to think that a coordinate position of an object can only be described by a single coordinate when doing time series analysis and signal compression?
Also,they mention about taking cartesian product.Why is that?