A 3D gait analysis system for a
treadmill
KinemaTracer
A
treadmill enables you to,,
- Capture gait with simple hardware architecture since
the treadmill fixes the capture area.
- Assess deviation in gait patterns
since multiple steps can be captured at the same speed.
Analysis Procedure : JUST 3 STEP
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One: Capture DV movie
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Two: 3D Calculation
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Three: Analysis(Comparison)
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1.Capture
DV movie
- No need to be big
space for capturing. Just small capture volume is needed for 4
cameras.
- Simple connection
between camera and PC with IEEE1394 cable.
- No need to use
extra synchronization unit
- Just one clink to
operate for recording DV movie with 4 cameras
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Camera
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Connection
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IEEE1394
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Number of Camera
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4
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Camera Synchronization
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Automatic Synchronization
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Image Size
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VGAi640~480j
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Frame Rate
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30fps / 60fps
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Move/Image format
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MovieFAVIAStatic ImageFBMP
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Calibration
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DLTmethod, modified DLT method
(Lens distortion correction)
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Marker
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Type / Shape
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Color
Spherical
Customized marker is available for your request
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Number of Marker
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64 (included ghost marker)
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Size
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30mm
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Control@Object
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Type / Shape
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Standard one is for gait analysis
Customized one is available for your request
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2D3D calculation
- No need to pay
attention to complicated file management. Mini-database is easy to
store whole type of data.
- Powerful search
function to get your requested data.
- No need of
Preprocessing for analog capturer, detection of syclonized flame
- High speed auto
digitize function by unique algorithm.
- Auto tracking
status bar is visible. Direct jump function to the lost maker flame.
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You can recognize each cordinates of
color marker with stick picture figure.
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You can
search target data by key word conbination such as Date, Name, Sex, Infomation and so on.
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3DAnalysis(Comparison)
- Just open data
file to display analysis result.
- Easy to switch
analysis menu for your own purpose. (Template Setting)
- Comparison
function for multiple data
- Flexible Report
Form (Customized Form for your own use)
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Rich in analysis menu
(click the image to magnify)
Animation and the stick picture are arranged
when two or more data is opened. Overwritten graph can also be
displayed. You can confirm mullti data of a numeric list such as the
walking cycleson within one window screen.
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Movie 
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Swith to display one to 4 camera
view at the same time.
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Stick Picture 
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Display
stick picture by a free aspect. Virtual center of gravity can be
displayed.
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Normalized graph
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Lissajous graph
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Time series graph
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Each steps
are extracted and normalized into gait cycle data. As a result,
different gait cycle can be compared.
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Virtical and horizontal axis can be set freely.
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The marker coordinates, the speed, the
acceleration, the angle of the joint, the corner speed, and the corner
acceleration are displayed.
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Basic Analysis
- Normalization, Average, SD, and CV of Stride length, Step
length, Stance phase, Swing phase, Double support phase, Gait cycle,
Cadence, Body-sway
Basic Analysis
- XYZ ploy, Speed, Acceleration, Angle of joint, velocity
of joints, Acceleration of joints
Rendering
- Stick picture, Tracking, Super impose, Time series graph,
Lissajou graph, Normalization graph,
- Numeric list, Rendering item configuration (Template)
Comparison
- Overwrite graphs, Motion images, Parallel rendering of
stick pictures, Simultaneous playback of multiple data
Output
- XY plot, XYZ plot, Graphs, Numeric lists
Digitize
- Auto-tracking, Reverse auto-tracking, Multiple maker
auto-track, Position anticipation, Auto-interpolation,
Manual-digitize
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