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Phase unwrapping algorithm for a segmented phase based on iterative pseudo-phase inpainting.

Nianfeng Wang, Jun Ma, Hui Ding

|September 1, 2022

Summary

This summary is machine-generated.

This study introduces an iterative pseudo-phase inpainting algorithm (IPPI) to solve segmented phase unwrapping problems. The IPPI effectively connects phase islands and reduces errors, ensuring accurate results even with significant noise.

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Area of Science:

Optics and Photonics
Image Processing

Background:

Phase-shifting techniques are widely used for quantitative phase measurements.
Segmented phase unwrapping presents a significant challenge in these techniques, often leading to inaccuracies.
Existing methods may require processing the effective phase area, potentially compromising result authenticity.

Purpose of the Study:

To introduce a novel algorithm for solving the intractable problem of segmented phase unwrapping.
To develop a method that connects disconnected phase regions (phase islands) accurately.
To provide a robust solution for phase unwrapping in the presence of severe noise.

Main Methods:

An iterative pseudo-phase inpainting algorithm (IPPI) is proposed.
Image inpainting techniques are employed to connect pseudo-phases across phase islands.
A reference pseudo-phase is generated using numerical carrier frequency and 2D Fourier transform to aid error reduction.
The algorithm avoids processing the effective area of the wrapped phase.

Main Results:

The IPPI successfully connects phase islands by realizing pseudo-phases.
Iterative inpainting reduces error points in the pseudo-phases.
The method preserves the authenticity of the wrapped phase's effective area.
Simulated and experimental results demonstrate high precision and robustness against severe noise.

Conclusions:

The iterative pseudo-phase inpainting algorithm (IPPI) offers an effective solution for segmented phase unwrapping.
The method is precise and robust, applicable to noisy and segmented phase data.
IPPI ensures the integrity of the original phase information by not processing the effective area.