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Improvement of the regularized phase tracking technique for the processing of nonnormalized fringe patterns
Ricardo Legarda-Sáenz1, Wolfgang Osten, Werner Jüptner
1Bremen Institute für Angewandte Strahltechnik, Germany. rlegarda@bias.de
Applied Optics
|September 13, 2002
Summary
A new Regularized Phase Tracking (RPT) technique improves fringe pattern demodulation by adding a modulation term. This enhancement allows RPT to process non-normalized fringe patterns effectively.
Area of Science:
- Optics and Photonics
- Image Processing
- Signal Processing
Background:
- Fringe pattern analysis is crucial for optical metrology.
- Regularized Phase Tracking (RPT) is an established technique for demodulating fringe patterns.
- Existing RPT methods often require normalized fringe patterns, limiting their applicability.
Purpose of the Study:
- To present an improved Regularized Phase Tracking (RPT) technique.
- To enhance RPT's capability to demodulate non-normalized fringe patterns.
- To introduce a novel term for modeling fringe pattern modulation within the RPT framework.
Main Methods:
- The study introduces a modified RPT algorithm.
- A new term is incorporated to model fringe pattern modulation.
- The improved technique is tested on diverse fringe pattern examples.
Main Results:
- The enhanced RPT technique successfully demodulates non-normalized fringe patterns.
- The added modulation term improves the robustness of the RPT method.
- Demonstrated effectiveness across various fringe pattern types.
Conclusions:
- The improved RPT technique offers a significant advancement for fringe pattern analysis.
- This method expands the applicability of RPT to a wider range of fringe patterns.
- The enhanced RPT is a powerful tool for optical measurement and imaging.