Ballet dancers dedicate years to perfecting their posture and body alignment, which are the foundations of both performance quality and injury prevention. However, dancers often rely heavily on mirrors, instructors, or video recordings for feedback. These methods can be limited, mirrors only show one perspective, instructors can’t always give individualized attention, and video reviews require manual effort and lack real-time feedback.

 The Ballet Posture Monitor was created to address this challenge by combining mechanical, hardware, and software solutions into a single system. A smartphone mounted on a motorized car moves along a 180º arc around the dancer, capturing their movements from multiple angles. The app then analyzes posture using computer vision, providing immediate, objective feedback on a 0 - 100 scale. Dancers can select poses, track their progress through a personal dashboard, and even export detailed reports for review.

 By offering precise, consistent, and accessible posture evaluation, this project helps ballet dancers improve faster, train more independently, and minimize the risk of injuries, ultimately supporting their artistic and physical development.

The project can be divided in the following segments:

Mechanical

• A moving car that holds the smartphone (acting as the camera).
• The car runs on top of a flexible hose that serves as a 2-meter rail, bent into a 180º arc around the dancer.
• The rail ensures the camera has a controlled trajectory to capture the dancer from multiple angles.
• The car’s movement along the arc allows dynamic posture analysis rather than a static front-facing view.

Hardware

• Smartphone:
  • Functions as the main camera.
  • Provides processing power for posture recognition (via app).
• Motors:
  • Drive the car smoothly along the hose-rail.
• Microcontroller (e.g., Arduino, ESP32, etc.):
  • Controls motor speed and position.
  • Tracks the exact location of the car along the arc to synchronize posture analysis.
• Power system: Battery or power bank to supply motors and electronics.

Software