Analysis of Runner Biomechanics

1
Analysis of Runner Biomechanics

• Using Edge Detection and Image Processing
  Techniques to Determine Pronation Levels
• Asa Kusuma

2
The Problem Determining Pronation

• Pronation Ankle rolling inward on impact
• Over-pronation major cause of running injuries
• Hard to determine with the eye, subtle

3
Pronation and Runners

• Every runner should pronate a moderate amount
• Too much pronation
• Strains achilies tendon
• Puts pressure on Tibia
• Strains inner knee
• Not enough pronation
• Supination
• Puts pressure on Fibula
• Strains IT Band

Overpronation
Supination
4
The Setup
2nd Quarter
5
Light
Light
Light
Ruler
2nd Camera
2nd Quarter
6
Tape
Background
7
How the Setup Works

• Camera
• Takes 20 Frames per second
• Produces 2 relevant images
• Before impact
• At impact
• Light
• Ensures universal lighting
• Ruler
• To measure distance from runner to camera
• Horizontal Tape
• Keeps runner in the same position relative to the
  camera
• Background
• Helps with edge detection

8
Method Edge Shift

• Get 2 Images, before and after impact
• Edge Detect
• Isolate the inner edge of foot/leg
• Find average x coordinate of edge
• Equalize image edges
• Compare x coordinates of edges

9
Equalizing images

• Equalized

• Not equalized

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11
Determining Relative Factors

• Camera
• Whats the resolution of the camera?
• Whats the FPS of the image capture
• Shift Method
• How much shifting constitutes over-pronation?

12
4th Quarter Plan

• Create Calibration Program
• Collects data from multiple runs on runners of
  different pronation degrees
• Uses data to calibrate relative factors
• Automatically adjust for camera resolution
• Implement GUI
• Further improve edge detection