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Related Experiment Video

Updated: Jun 3, 2026

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
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High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques

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Object-image-based method to construct an unweighted quality map for phase extraction and phase unwrapping.

Suping Fang1, Leijie Wang, Pengcheng Yang

  • 1State Key Laboratory of Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, 710049, China.

Applied Optics
|April 5, 2011
PubMed
Summary

A novel method constructs an unweighted quality map for phase extraction and unwrapping using object image patterns. This technique accurately identifies valid and invalid interference regions, improving phase measurement accuracy.

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Area of Science:

  • Optics and Photonics
  • Image Processing
  • Metrology

Background:

  • Phase extraction and unwrapping are crucial in interferometry.
  • Accurate quality maps are essential for reliable phase data.
  • Existing methods for quality map generation can be complex or limited.

Purpose of the Study:

  • To propose a new method for constructing an unweighted quality map.
  • To improve phase extraction and unwrapping accuracy.
  • To provide an alternative, feasible approach for quality map generation.

Main Methods:

  • Utilizing an object image pattern recorded without reference arm light.
  • Identifying homologous regions between object and interference patterns.
  • Applying neighbor window threshold filtering and boundary fitting to distinguish object/background.

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Last Updated: Jun 3, 2026

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Main Results:

  • Successfully generated an unweighted quality map.
  • Demonstrated the ability to delineate valid and invalid interference regions.
  • Validated the method's feasibility and correctness through real measurements.

Conclusions:

  • The proposed method offers a viable alternative for creating unweighted quality maps.
  • This technique enhances the reliability of phase extraction and unwrapping.
  • The approach is practical for real-world interferometric measurements.