WorldViz PPT-E, Руководство по эксплуатации, Страница: 49 / 163

Calibration
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Chained calibration
In this method, cameras are calibrated in stages. Use this method for a physical
workspace where not all cameras can see the calibration rig simultaneously (e.g., the
room is L-shaped).
1. Follow steps 1 - 4 above.
2. If you're starting a new chained calibration, click the Reset button to clear all
previous data.
3. Click the Calibrate button at the top of the window. Each of the camera's four
indicator lights will turn green for each flash of the PPT calibration rig.
4. Cameras that are fully calibrated are now indicated with the green checkmark
icon. Cameras that show a yellow icon indicate that the camera saw all four
makers on the calibration rig but it cannot yet chain due to lack of data from a
neighboring (connecting) camera. Cameras that show a red icon indicate
cameras that saw less than four markers on the calibration rig.
5. Move the calibration rig enough so that some or all those cameras indicated as
red can now fully see the calibration rig.
6. Once all cameras are calibrated, you'll receive a quality score. Good scores are
in the range of 95-100; scores greater than 90 are still acceptable.
NOTE about chaining
Use as few calibration snapshots as possible, typically this is done by "sweeping" the
calibration rig from one end of the space to the other. If you suspect a camera
calibrated but may contain poor measurements (e.g., the rig was at the extreme
edge of the camera's view), you can easily right click on the camera to mark it as
uncalibrated, and then redo it.
Clearing calibrations
From either the Cameras panel or the 2D view, you can right-click a camera and
select Clear calibration to void a particular camera's calibration, forcing the PPT
system to re-calibrate it during the next calibration. You can also clear all or some
cameras directly in the Calibration guide.