Single-shot calibration method based on Fourier transform profilometry.

Area of Science:

• Optics and Photonics
• Computer Vision
• Metrology

Background:

• Structured light systems are crucial for 3D reconstruction and measurement.
• Traditional calibration methods for structured light systems are often time-consuming and complex.
• Existing methods typically require capturing numerous fringe patterns.

Purpose of the Study:

• To introduce a novel, simplified, and time-efficient calibration method for structured light systems.
• To reduce the number of captured patterns required for accurate calibration.
• To enhance the practicality of structured light system calibration.

Main Methods:

• A single composite fringe pattern combining vertical and horizontal components was developed.
• Bidirectional phase retrieval was performed using Fourier transform profilometry (FTP).
• A single-shot pattern capture approach was employed for calibration.

Main Results:

• The proposed method significantly simplifies the calibration process.
• Calibration time is substantially reduced compared to conventional techniques.
• Experimental results show high accuracy and robustness, comparable to traditional methods.
• The method successfully retrieves bidirectional phase information from a single pattern.

Conclusions:

• The novel single-shot calibration method offers a faster and simpler alternative for structured light systems.
• Fourier transform profilometry (FTP) is effectively utilized for efficient phase retrieval.
• This technique maintains high accuracy and robustness, making it suitable for practical applications.