Fourier MultiLab, User Manual

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Chapter 2 MultiLab Software 83
You can change the coordinate system origin and direction anytime by clicking Set
origin or Rotate origin and repeating the procedure.
3. Set Step
In the marking process, MultiLab automatically steps the video to the next frame
every time you click to add a marker.
To change the step to more then one frame at a time:
1. Click Video analysis on the menu bar and click Frame transition
to open the Frame transition dialog:
2. In the Step edit box, type in the number of frames you want
MultiLab to advance in one step
3. Click OK
4. Mark the Video
One-body motion
1. Click Play on the Video Motion Analyzer toolbar and observe
the motion
2. Decide what will be the marking point – the exact point on the
moving object that you want to mark
Tip: Try to choose a clear and sharp point that is visible throughout the entire movie
3. Click Go to first to roll the film back to the beginning
4. Click Next frame until you reach the frame with which you want
to start the capture
5. Click the marking point on the moving object
MultiLab automatically marks the point on the screen and creates two new data sets
(one for x coordinates and one for y coordinates). It then adds the point
’ s coordinates
and time to the corresponding data sets and updates both the graph and the table,
then automatically moves to the next frame
Note: You don ’ t see the mark because the display had already moved to the next
frame.