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Vision processing for realtime 3-D data acquisition based on coded structured light.

S Y Chen1, Y F Li, Jianwei Zhang

  • 1College of Information Engineering, Zhejiang University of Technology, 310014 Hangzhou, China. sy@ieee.org

IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society
|February 14, 2008
PubMed
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This study introduces a novel color-encoded structured light system for real-time 3-D surface measurement of dynamic scenes. By using a single image, it overcomes limitations of traditional systems requiring multiple captures.

Area of Science:

  • Computer Vision
  • 3-D Reconstruction
  • Optical Metrology

Background:

  • Structured light vision systems excel at 3-D surface measurement but are limited to static scenes.
  • Capturing multiple images for 3-D scene recovery restricts applications to stationary objects.

Purpose of the Study:

  • To enable real-time 3-D surface data acquisition for dynamic scenes using a single image.
  • To improve the efficiency of 3-D reconstruction in computer vision applications.

Main Methods:

  • A uniquely color-encoded pattern projection principle is proposed.
  • A color matrix is designed using special code sequences and state transitions.
  • A computer-controlled color projector generates unique color patterns for local analysis.

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Main Results:

  • The proposed method allows for 3-D measurement from a single image.
  • Unique indexing of light codes ensures accurate identification of each light grid.
  • The system demonstrates efficient 3-D data acquisition for dynamic scenes.

Conclusions:

  • The developed vision system facilitates real-time 3-D surface acquisition of dynamic scenes.
  • Unique color encoding significantly enhances reconstruction efficiency.
  • This approach expands the applicability of structured light systems.