Modified detection scheme for locating phase jumps and reducing detection errors.

Area of Science:

• Optical metrology
• Image processing

Background:

• Phase unwrapping and filtering are crucial for accurate phase measurements.
• Existing noise and phase jump detection schemes often miss corresponding pixel positions or introduce errors.

Purpose of the Study:

• To develop an improved detection scheme for phase jump and noisy pixels.
• To enhance the accuracy and reliability of phase unwrapping algorithms.

Main Methods:

• A modified detection scheme was developed based on a previously published method.
• The scheme generates noise and phase jump maps to identify problematic pixels.
• The modified approach ensures detection of both 2π-high and 0-low phase jump positions.

Main Results:

• The modified scheme successfully identifies both 2π-high and corresponding 0-low phase jump positions.
• Detection errors, including repeated or noise-induced pixels, are significantly reduced.
• Robustness was confirmed through numerical simulations and experimental validation.

Conclusions:

• The modified detection scheme offers improved accuracy for identifying phase jump and noisy pixels.
• This advancement contributes to more reliable phase unwrapping and filtering in optical measurements.