Phase Estimation in Optical Interferometry

222 ◾ Gannavarpu Rajshekhar, Sai Siva Gorthi, and Pramod Rastogi

e local polynomial phase-modeling approach using the HAF technique

was applied. For the analysis, we used N

s

= 4 (i.e., four segments) and

M = 3, that is, cubic phase approximation. e estimated phase using the

method is shown in Figure6.12b. ese results arm that the HAF tech-

nique has good potential for phase estimation in DHI.

6.7 PHASE-DIFFERENCING OPERATOR

In the techniques discussed so far, we can observe that all relied on 1-D

processing only. In other words, we initiate the local polynomial phase-

modeling approach by considering a given column (or row) and then ...