Changes

[2] cuevas et al 2002

[2] cuevas et al 2002

[3] ge et al 2001

[3] ge et al 2001

== Regularized Phase Tracking Algorithms==

== Regularization Algorithms==

The regularization method was created for the specific purpose of automatically demodulating "noisy" fringe patterns without any further unwrapping of the phase.  Regularization algorithms involve evaluating the estimated phase field with a cost function against the actual pattern and then imposing the smoothness criterion.  This method is repeated for each pixel on the phase field, until a global minimum is reached in the cost function.

The regularization technique for fringe pattern analysis involves using a cost function to find the difference between an estimated function and the observed interferogram and

 

Variations of the regularization method involve demodulating certain points in the low frequency region of the fringe pattern.  This point can then be used to seed the estimated phase field.  The algorithm then follows a somewhat analogously to crystal growing.

 

A drawback to this method arises from the fact "that a low-pass filtering a a binary threshold operation are required."

 

== Phase-Locked Loop Algorithm ==

== Phase-Locked Loop Algorithm ==