Study on a novel algorism of phase unwrapping for interferogram processing

2010 ◽  
Author(s):  
Jun-hong Su ◽  
Wen-bo Wan ◽  
Li-hong Yang ◽  
Jun-qi Xu
Keyword(s):  
Phase Unwrapping ◽  
Interferogram Processing

Phase unwrapping based on the phase‐gradient‐jump connections

2017 ◽  
Vol 53 (10) ◽  
pp. 683-685 ◽  
Author(s):  
Tao Zhang ◽  
Xiaolei Lv ◽  
Jiang Qian ◽  
Jun Hong ◽  
Ye Yun
Keyword(s):  
Phase Unwrapping ◽  
Phase Gradient

The PHU‐NET: A robust phase unwrapping method for MRI based on deep learning

2021 ◽  
Author(s):  
Hongyu Zhou ◽  
Chuanli Cheng ◽  
Hao Peng ◽  
Dong Liang ◽  
Xin Liu ◽  
...  
Keyword(s):  
Deep Learning ◽  
Phase Unwrapping

scholarly journals Combined Reduced Phase Dual-Directional Illumination Digital Holography and Speckle Displacements for Shape Measurement

2019 ◽  
Vol 2019 ◽  
pp. 1-6
Author(s):  
Davood Khodadad
Keyword(s):  
Phase Difference ◽  
Digital Holography ◽  
Relative Phase ◽  
Groove Depth ◽  
Phase Unwrapping ◽  
Shape Measurement ◽  
Phase Ambiguity ◽  
Holographic Method ◽  
Height Range ◽  
Phase Differences

We present a digital holographic method to increase height range measurement with a reduced phase ambiguity using a dual-directional illumination. Small changes in the angle of incident illumination introduce phase differences between the recorded complex fields. We decrease relative phase difference between the recorded complex fields 279 and 139 times by changing the angle of incident 0.5° and 1°, respectively. A two cent Euro coin edge groove is used to measure the shape. The groove depth is measured as ≈300  μm. Further, numerical refocusing and analysis of speckle displacements in two different planes are used to measure the depth without a use of phase unwrapping process.

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