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An improved video-based computer tracking system for soft biomaterials testing.

J Downs1, H R Halperin, J Humphrey

  • 1Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, MD 21205.

IEEE Transactions on Bio-Medical Engineering
|September 1, 1990
PubMed
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This study introduces an enhanced video-based system for real-time tracking of planar markers. The improved system achieves a 30-Hz frame rate, offering faster and more informative data collection for material testing.

Area of Science:

  • Engineering
  • Biophysics
  • Materials Science

Background:

  • Accurate tracking of small markers is crucial for analyzing material deformation.
  • Existing video-based tracking systems often suffer from limitations in speed or data output.

Purpose of the Study:

  • To develop and present an improved video-based computer system for on-line tracking of planar markers.
  • To enhance the speed and information yield of marker tracking for material analysis.

Main Methods:

  • Utilized a Charge-Coupled Device (CCD) camera, microcomputer, video frame grabber, and custom software.
  • Implemented a two-step, correlation-based search procedure for marker tracking.
  • Integrated the system for collecting strain data during biaxial stretching tests on soft tissues.

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Main Results:

  • The system successfully tracks up to four markers at a 30-Hz video frame rate.
  • Demonstrated the system's capability in collecting strain data from planar soft tissues.
  • Achieved a higher frame rate and greater information yield compared to previously reported systems.

Conclusions:

  • The presented video-based system offers a significant improvement for real-time marker tracking.
  • The system is suitable for precise strain data collection in biomechanical and material science applications.
  • This technology advances the capabilities for analyzing dynamic behavior in soft materials.