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Solving problems related to two-dimensional force systems is an essential aspect of mechanics and engineering. By applying the principles of vector analysis and force equilibrium, one can determine the effect of multiple forces acting on an object in a two-dimensional space.
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Related Experiment Video

Updated: Dec 11, 2025

Comparison of Kinetic Characteristics of Footwork during Stroke in Table Tennis: Cross-Step and Chasse Step
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iKarate: Karate Kata Guidance System.

Bassel Emad1, Omar Atef1, Yehya Shams1

  • 1Faculty Of Computer Science, Misr International University (MIU), Cairo, Egypt.

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|August 25, 2020
PubMed
Summary
This summary is machine-generated.

This study introduces a smart coaching system for martial arts, using Infrared (IR) cameras and Fast Dynamic Time Warping (F-DTW) to analyze Karate movements. The system accurately identifies incorrect moves and provides feedback for performance improvement.

Keywords:
Body GesturesClassificationComputer VisionHuman Activity RecognitionHuman Motion AnalysisKinectMotion DetectionSignal Analysis

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Area of Science:

  • Human Motion Analysis
  • Sports Science
  • Artificial Intelligence in Sports

Background:

  • Incorrect execution of martial arts techniques is common.
  • Automated feedback systems can improve training efficacy.
  • Smart coaching offers a novel approach to skill acquisition.

Purpose of the Study:

  • To develop and evaluate a smart coaching system for martial arts.
  • To accurately classify Karate movements and identify errors.
  • To provide actionable feedback for performance enhancement.

Main Methods:

  • Utilized Infrared (IR) camera sensors for motion capture.
  • Implemented Fast Dynamic Time Warping (F-DTW) for movement classification.
  • Developed a database for storing and processing movement data.
  • Focused on the first seven movements of Karate Kata 1 (Hein Shodan).

Main Results:

  • Achieved 91.07% accuracy in classifying martial arts movements.
  • Successfully identified common mistakes for each analyzed move.
  • Generated detailed reports for user performance analysis.

Conclusions:

  • The developed smart coaching system is effective for analyzing and improving martial arts performance.
  • IR cameras and F-DTW provide a robust method for human motion analysis in sports.
  • This technology has the potential to revolutionize martial arts training.