RT Journal Article
T1 Noise robust linear dynamic system for phase unwrapping and smoothing
A1 Quiroga Mellado, Juan Antonio
A1 Estrada, Julio César
A1 Servín Guirado, Manuel
AB Phase unwrapping techniques remove the modulus 2 π ambiguities of wrapped phase maps. The present work shows a first-order feedback system for phase unwrapping and smoothing. This system is a fast phase unwrapping system which also allows filtering some noise since in deed it is an Infinite Impulse Response (IIR) low-pass filter. In other words, our system is capable of low-pass filtering the wrapped phase as the unwrapping process proceeds. We demonstrate the temporal stability of this unwrapping feedback system, as well as its low-pass filtering capabilities. Our system even outperforms the most common and used unwrapping methods that we tested, such as the Flynn's method, the Goldstain's method, and the Ghiglia least-squares method (weighted or unweighted). The comparisons with these methods show that our system filters-out some noise while preserving the dynamic range of the phase-data. Its application areas may cover: optical metrology, synthetic aperture radar systems, magnetic resonance, and those imaging systems where information is obtained as a demodulated wrapped phase map.
PB The Optical Society Of America
SN 1094-4087
YR 2011
FD 2011-03-14
LK https://hdl.handle.net/20.500.14352/43931
UL https://hdl.handle.net/20.500.14352/43931
LA eng
NO © 2011 Optical Society of America
DS Docta Complutense
RD 23 abr 2025