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Related Experiment Video

Updated: Feb 5, 2026

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
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RGB Colour Encoding Improvement for Three-Dimensional Shapes and Displacement Measurement Using the Integration of

Luis Felipe-Sesé1, Ángel Jesús Molina-Viedma2, Elías López-Alba3

  • 1Department of Mechanical Engineering, Campus Científico Tecnológico de Linares, University of Jaén, 23700 Linares, Spain. lfelipe@ujaen.es.

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|September 20, 2018
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Summary

Researchers improved fringe projection plus digital image correlation (FP + DIC) for accurate 3D measurements. Innovations in color pattern encoding, using multisensor cameras or laser illumination, significantly reduced measurement uncertainty by up to 50%.

Keywords:
3D displacements3D shapedigital image correlationexperimental mechanicsfringe projection

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Area of Science:

  • Experimental Mechanics
  • Optical Measurement Techniques

Background:

  • Three-dimensional digital image correlation (3D-DIC) is a leading full-field optical technique for shape and displacement analysis.
  • Fringe projection combined with 2D digital image correlation (FP + DIC) offers a cost-effective alternative to 3D-DIC, avoiding stereoscopic system limitations.

Purpose of the Study:

  • To present innovations in FP + DIC experimentation for enhanced accuracy.
  • To improve the color pattern encoding for more precise measurements.

Main Methods:

  • Implementation of a multisensor camera system.
  • Utilization of laser structural illumination.
  • Analysis and evaluation of both proposed alternatives for FP + DIC.

Main Results:

  • Improvements in both three-dimensional and in-plane displacement measurements were achieved.
  • Laser structural illumination proved particularly effective for low-uncertainty 2D displacement measurements.
  • Uncertainty in measurements was reduced by up to 50% compared to prior FP + DIC methods.

Conclusions:

  • Innovations in color pattern encoding significantly enhance the accuracy of FP + DIC.
  • Laser structural illumination is a key advancement for high-precision 2D displacement measurements using FP + DIC.
  • The developed techniques offer a more accurate and potentially lower-uncertainty method for experimental mechanics.