Frequency selection in absolute phase maps recovery with two frequency projection fringes

In a recent published work we proposed a technique to recover

the absolute phase maps of two fringe patterns with different spatial

frequencies. It is demonstrated that a number of selected frequency pairs

can be used for the proposed approach, but the published work did not

provide a guideline for frequency selection. In addition, the performance of

the proposed technique in terms of its anti-noise capability is not addressed.

In this paper, the rules for selecting the two frequencies are presented based

on theoretical analysis of the proposed technique. Also, when the two

frequencies are given, the anti-noise capability of technique is formulated

and evaluated. These theoretical conclusions are verified by experimental

results.