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Analysis of the phase unwrapping algorithm
Applied Optics, 1982Several workers have recently proposed digital techniques for high-resolution imaging through the turbulent atmosphere. The basic concept of these algorithms is to calculate and average phase angles of a series of image Fourier transforms to suppress the unwanted atmospheric effects on image resolution.
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Temporal Phase Unwrapping Based on Unequal Phase-Shifting Code
IEEE Transactions on Image Processing, 2023In fringe projection profilometry (FPP) based on temporal phase unwrapping (TPU), reducing the number of projecting patterns has become one of the most important works in recent years.
Hai-Hua An +3 more
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Phase-Shifting Temporal Phase Unwrapping Algorithm for High-Speed Fringe Projection Profilometry
IEEE Transactions on Instrumentation and Measurement, 2023Fringe projection profilometry based on temporal phase unwrapping (TPU) without error propagation has been widely used to measure the 3-D shape of the complex scene.
Hai-Hua An +3 more
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Pixel-Wise Phase Unwrapping With Adaptive Reference Phase Estimation for 3-D Shape Measurement
IEEE Transactions on Instrumentation and Measurement, 2023Phase unwrapping plays an important role in phase-based 3-D shape measurement. This article proposes an effective pixel-wise phase unwrapping method without requiring additional fringe patterns.
Yuwei Wang +4 more
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Robust phase unwrapping via non-local regularization.
Optics Letters, 2023Phase unwrapping is an indispensable step in recovering the true phase from a modulo-2π phase. Conventional phase unwrapping methods suffer from error propagation under severe noise.
Liheng Bian +4 more
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Absolute Phase Unwrapping for Objects With Large Depth Range
IEEE Transactions on Instrumentation and Measurement, 2023This article presents a method for unwrapping the phase using only the geometric constraints and photometric information of the structured light system, which can cope with objects in a large depth range without the need for additional image acquisition ...
Jian Yu, F. Da
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An Improved Phase Unwrapping Algorithm
Proceedings of the 2020 4th International Conference on Electronic Information Technology and Computer Engineering, 2020InSAR technology plays an increasingly important role in detecting subsidence, while phase unwrapping is one of the most important steps in the InSAR process whose efficiency will directly affect digital elevation model. There has been no universal algorithm for phase unwrapping because the gradient between adjacent phases, such as noise, may be ...
Xiaomao Chen, Zhongyuan Wen, Qi Wu
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Deep Learning-Based Branch-Cut Method for InSAR Two-Dimensional Phase Unwrapping
IEEE Transactions on Geoscience and Remote Sensing, 2022Two-dimensional (2-D) phase unwrapping (PU) is a critical processing step for many synthetic aperture radar (SAR) interferometry (InSAR) applications. As is well known, the traditional 2-D PU is an ill-posed inverse problem, which means that regardless ...
Lifan Zhou +3 more
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PU-GAN: A One-Step 2-D InSAR Phase Unwrapping Based on Conditional Generative Adversarial Network
IEEE Transactions on Geoscience and Remote Sensing, 2022Two-dimensional phase unwrapping (PU) is a classical ill-posed problem in synthetic aperture radar interferometry (InSAR). The traditional algorithmic model-based 2-D PU methods are limited by the Itoh condition, which is from the PU researchers ...
Lifan Zhou +3 more
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Curtain-type phase unwrapping algorithm
Optical Engineering: The Journal of SPIE, 2022. A curtain-type phase unwrapping algorithm is proposed. First, the 2 × 2 closed curve method is used to find out the residual point of the wrapped phase to form the residual template, and the Otsu threshold method is used to binary the modulation of ...
Cai Xu +5 more
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