A Topology-Based Stereo Matching Method for One Shot 3D Measurement Using Coded Spot-Array Structured Light

Area of Science:

• Computer Vision
• Optical Metrology
• 3D Reconstruction

Background:

• Accurate 3D measurement is crucial for various applications.
• Structured light techniques offer robust 3D reconstruction.
• Existing methods often require multiple captures or complex calibration.

Purpose of the Study:

• To propose a topology-based stereo matching method for 3D measurement.
• To enable single-shot 3D reconstruction using coded structured light.
• To address challenges of missing coded spots in structured light patterns.

Main Methods:

• A coded spot-array structured light pattern with unique topological coding was designed.
• Rectangle templates were used to locate encoded spots, even when missing.
• An interpolation method was developed to reconstruct missing spots.

Main Results:

• The proposed method achieved exact and unique decoding of each spot.
• Successful establishment of stereo matching relations was demonstrated.
• High-accuracy 3D reconstruction was achieved with a single-shot approach.

Conclusions:

• The topology-based stereo matching method provides an effective solution for 3D measurement.
• The technique is robust to missing spots and enables efficient single-shot reconstruction.
• This method advances the field of structured light-based 3D measurement.