Vision Research, Inc. | Phantom Ultrahigh-Speed Camera Manual
COLLECT POINTS
Collect Points: Point data (for up to 99 points-per-image) can be collected and
tracked within PCC software and imported by third party programs. This feature
creates a separate comma-separated text-delimited file for coordinates, speed
and/or acceleration.
COLLECT POINT DATA FOR TRACKING
The point data can be collected two ways:
1. Manual Track: Used to track point positions (coordinates) from one image to the
next once its starting point is defined.
2. Auto Track: Used to track point positions from one image to the next once its
starting point is defined.
‘Auto Tracking’ is done during the play of the Cine (step forward, step backward, play
forward, play reverse). It is very important that the images be in succession; ‘Auto
Tracking’ will self-disable if they are not. To avoid this from occurring, ‘Play Speed &
Options>Play Each Image’ is forced on. It will also disable itself when jumping from
the last image to the first. However, the points will remain attached to those areas
in the image, as they are stored in the user-specified ‘.ppf’ (pictures-per-frame) file.
This allows the end-user to reopen a Cine and/or picture-per-frame file to overlay
the points, or export the file to a spreadsheet.
AUTOTRACKING STEP-BY-STEP
After the measurement units, calibration and origin points have been defined:
1. Locate the first frame with the points to be tracked.
2. Create a ‘.ppf’ (picture-per-frame) file by clicking the ‘...’ button near the ‘File Path’
box under ‘Collect Points.’
3. Navigate to the folder to save the ‘.ppf’ file, enter a name and click the ‘Open’ button.
4. Specify the number of points to be collected (tracked) in the ‘PPF’ field (99 max.).
5. Enable the ‘Active’ box.
6. Click the center of the point(s) to be tracked. Ideally, the selected points should be
a small target or the edge of an object that will be in motion. Do this until all points
have been manually specified. If the ‘Auto advance to next image during collect
points’ has been enabled in the ‘Preferences>Measurements’ tab, step backward
to the image with the defined points.
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