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The noise-induced phase inconsistency impact on the interferometric phase information content is studied. Phase inconsistencies, or residues, hinder a correct unwrapping of the phase signal. The probability of noise-induced phase inconsistencies is obtained as a function of the signal-to-noise ratio. Moreover, a two-dimensional noise-residue filter, intended to be applied as a preprocessing step before phase unwrapping, is proposed. This method is based on the observation that the noise mainly creates adjacent phase inconsistencies in interferometric phase images. A local analysis leads to a set of rules to be applied to reduce noise-induced phase inconsistencies. The filter performances are tested on noisy synthetic and real phase data.

Additional information

Authors: NICO G, European Commission, Joint Research Centre, Space Applications Institute, Ispra (IT)
Bibliographic Reference: Article: Journal of the Optical Society of America, Vol. 17 (2000) No. 11, pp. 1-13
Availability: Journal of the Optical Society of America
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