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3D PROCEDURES: 3D Kinematic Calibration and filming (1) Calibratrion (How…
3D PROCEDURES: 3D Kinematic Calibration and filming
Steps to follow
Set up
Cameras
2D view
3D view
Marker/ Intensity/ Video
Use sidebar to adjust the camera settings
1) Calibratrion
How to calibrate
Calibration kit
The calibration case contains a folded L-shaped tool, one or two carbon fiber wands with reflective markers affixed to them, and a wand handle
Before calibrating
Start by making sure that there are no markers within the cameras' view
Setting the origin point
The longer side of the L-frame will define the X axis of the lab, whereas the shorter side will define the Y-axis
Calibrating
Viewing the calibration results
Understand the calibration results
Get a wide range area with the wand
Use the software
9 camera comp.
2 dots will calibrate the camera
You can increase calibration to 2 min
You should get on the screen: "Calibration 0 hours old"
2) "Nice walk"
3) Do analysis track
There shouldn't be a white dot on the screen, so move the object that is causing that
4) L-frame setup
Board to end
Side bar
Record data
Label data
How to prepare your subject
Before your subject arrives
Clothing considerations
Gathering the supplies
Preparing the markers
Marker sets
Checking your subject's clothing
Placing EMG electrodes
SENIAM guidelines
EMG manufacturer's documentation and relevant scientific papers and books for further guidance on how to place electrodes effectively
Placing motion capture markers
Clusters
Individual markers
Volume = Box (Graph)
You have 1 minute to get the area
How close we get from the 2 dots should be at least < than 2 mm error (SD)
Manipulations
MODEL
Static (1st)
about 86 markers
Dynamic
Movement
50-80 markers
SOFTWARE
Label the markers
Look at the marker %
it's good to get 100%
Then you get the GRAPH
Calculation 4 points
Magnitude
Position
Angles
Acceleration
How to record a measurement
1) Place markers
2) Record
3) Label the markers
4) Create an AIM model
5) Define a rigid body