Robust detection scheme on noise and phase jump for phase maps of objects with height discontinuities-theory and experiment

Jing Feng Weng, Yu Lung Lo

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

This paper proposes a robust noise and phase jump detection scheme for noisy phase maps containing height discontinuities. The detection scheme has two primary functions, namely to detect the positions of noise and to locate the positions of the phase jumps. Generally speaking, the removal of noise from a wrapped phase map causes a smearing of the phase jumps and therefore leads to a loss of definition in the unwrapped phase map. However, in the proposed scheme, the boundaries of the phase jump regions are preserved during the noise detection process. The validity of the proposed approach is demonstrated using the simulated and experimental wrapped phase maps of a 3D object containing height discontinuities, respectively. It is shown that the noise and phase jump detection scheme enables the precise and efficient detection of three different types of noise, namely speckle noise, residual noise, and noise at the lateral surfaces of the height discontinuities. Therefore, the proposed scheme represents an ideal solution for the pre-processing of noisy wrapped phase maps prior to their treatment using a filtering algorithm and phase unwrapping algorithm.

Original languageEnglish
Pages (from-to)3086-3105
Number of pages20
JournalOptics Express
Volume19
Issue number4
DOIs
Publication statusPublished - 2011 Feb 14

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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