Fast modulation measurement profilometry based on phase-shifting and modulation ratio

Area of Science:

• Optics and Photonics
• Metrology and Measurement Science
• Computer Vision and Image Processing

Background:

• Traditional profilometry techniques struggle with shadows and occlusions.
• Vertical measurement approaches offer a potential solution to these limitations.

Purpose of the Study:

• To develop a fast modulation measurement profilometry system for rapid 3D surface reconstruction.
• To address limitations of existing methods by mitigating shadow and occlusion issues.

Main Methods:

• A system integrating a high-speed camera, projector, and beam splitter was designed.
• Vertical and horizontal gratings with phase-shifting were projected onto moving objects.
• Modulation ratio was calculated from captured fringe data to map object height.

Main Results:

• The system successfully reconstructed the 3D surface profile of measured objects.
• Experimental results validated the feasibility and speed of the proposed method.
• The technique effectively mitigated issues related to shadows and occlusions.

Conclusions:

• The proposed fast modulation measurement profilometry is a viable technique for rapid 3D surface reconstruction.
• This method offers an effective solution for overcoming measurement challenges posed by shadows and occlusions.
• The system's performance demonstrates its potential for industrial and scientific applications.