Simple, flexible calibration of phase calculation-based three-dimensional imaging system.

Area of Science:

• Optics and Photonics
• Computer Vision
• Metrology

Background:

• Phase-based 3D imaging systems require accurate calibration to establish the relationship between phase data and depth information.
• Current calibration methods often involve complex laboratory setups with translation stages or gauge blocks, limiting their practicality.

Purpose of the Study:

• To introduce a novel, simple, and flexible calibration method for phase-based 3D imaging systems.
• To overcome the limitations of existing calibration techniques by eliminating the need for specialized laboratory equipment.

Main Methods:

• The proposed method utilizes a checkerboard pattern to determine the internal parameters of a Charge-Coupled Device (CCD) camera.
• A white plate with discrete markers of known separation is employed to acquire phase and depth data for each pixel.
• This allows for the direct establishment of the phase-to-depth relationship.

Main Results:

• Experimental results demonstrate the reliability of the proposed method in accurately mapping phase data to depth information.
• Performance evaluation confirms the simplicity and flexibility of the new calibration technique.
• The method successfully builds an accurate relationship between phase maps and depth data.

Conclusions:

• The developed calibration method offers a practical and efficient solution for phase-based 3D imaging.
• It simplifies the calibration process, making it more accessible and adaptable.
• The technique ensures accurate phase-to-depth mapping for improved 3D reconstruction.