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Kinematic Approaches: 2D Analysis of Movement (Considerations (2D…
Kinematic Approaches: 2D Analysis of Movement
Multiple shots
Screen by screen shots
data
2D Camera
Coordinates (like the game Battle ship)
Live markers
Computer analysis
Calibration = pixels into real world units
3 Points to make an angle (vector middle)
6 different variables to analyse your project (PCAM): angles, velocity and acceleration
Motion capture
Higher frame rate = more details
Naked eye (memory)
Photography (snapshots, strobe light)
Video capture and playback
Understand how many frames per seconds your camera has
Technique in video analysis, have multiple cameras
(angles)
Shutter speed (= Open and Closing)
1/x
Center of ball? 1/100 = high (less light) so use sports lights
Tripod/ TIPS
data errors when off 90 degrees
Data collection
Video sound = stupid (know which data is the good one) in slow-mo useless
Know what you are measuring before collecting data, make sure camera can fit the participants
Digitisation
2D v 3D Analysis and Recording
Considerations
Video camera
Have you recorded a reference frame/markers
Do you know which trial is which? (visible numbers?)
Is the frame rate appropriate for the activity?
Movement
Participant
Analysis
2D Kinematics (W6)
Participants
Video recording
Video digitising
Processing, analysing and reporting