Phase unwrapping using morphologic processing

A simple method for phase unwrapping is proposed. When phase is smooth, continuous and slightly noisy, morphological processing can be used to estimate the unwrapped phase. The application of morphological processing converts the continuous (real) range [-π, π) into a discrete (integer) range. This domain transformation may allow an increase of speed performance in the unwrapping phase processing. Since the wrapped phase is modulo 2π, it is possible to delimit regions with 4-connectivity that allows the proper phase map estimation. The maximum intensity of the noise that allows a good reconstruction of the original phase map was 2.