Real-Time and High-Resolution 3D Face Measurement via a Smart Active Optical Sensor

Area of Science:

• Optics and Photonics
• Computer Vision
• Metrology

Background:

• Traditional active optical sensing methods like Fourier transform profilometry are limited by zero frequency, impacting 3D measurement accuracy and range.
• The phase-shifting technique, commonly used to mitigate zero frequency, requires multiple fringe patterns, hindering real-time applications.

Purpose of the Study:

• To introduce a novel smart active optical sensor capable of removing zero frequency using a single composite pattern.
• To evaluate the feasibility and precision of this new method for 3D face reconstruction and measurement.

Main Methods:

• Development of a smart active optical sensor utilizing a composite pattern combining phase-shifting fringes and carrier frequencies.
• Application of the composite pattern to remove zero frequency with a single fringe pattern capture.
• Validation through model face reconstruction and human face measurement, incorporating texture mapping for natural appearance.

Main Results:

• The proposed composite pattern effectively removes zero frequency in a single shot.
• The novel method demonstrates comparable precision to traditional phase-shifting techniques without performance degradation.
• Successful 3D digital face reconstruction with natural appearance was achieved using texture mapping.

Conclusions:

• The smart active optical sensor with a composite pattern offers an efficient and precise solution for 3D measurements.
• This approach overcomes the real-time limitations of traditional phase-shifting methods.
• The technique is validated for accurate and visually realistic 3D face reconstruction.