Camera Set Up
- Created by: katieplatts
- Created on: 29-04-19 09:31
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- BIOMECHANICS CAMERA SET UP
- Adequate lighting
- Uncluttered
- Large space
- Line on the floor to replicate plane of motion and a line perpendicular
- 3, 4, 5 Triangle
- Camera perpendicular to plane of motion
- Stationary, rigid tripod
- TELEPHOTO lens can maximise image size and reduce parallax
- Setting camera far away and zooming in reduces parallax but can reduce quality of image.
- More than one camera
- Event Synchronisation
- Synchronise at time of data collection
- Gen Locking
- Synchronise at time of data collection
- Event Synchronisation
- Performer Preparation
- Markers on joint centres
- Contrast to skin colour/background
- Unhindered movement
- 2D Models
- Coordinates define body segments
- Assumes segments are rigid and fixed mass
- Assumes segments are joined in pin joints.
- Digitising
- Clear contrast of marker, clear lighting and clarity
- Frame Rate
- Number of frames per second
- Shutter Speed
- Controls time the sensor is open to light. Affect image clarity and exposure
- Faster Movements = Higher Shutter Speed
- 1/50th to 1/8000th
- Scaling
- Enables real life coordinates to be calculated when digitised
- Parallel Error
- Movement away from parallel alignment
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