Difference between revisions of "Calibration Squares"

(Custom Calibration Square)
(Coordinate System (Motive 1.7+))
 
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During [[Calibration]] process, a calibration square is used to define global coordinate axes as well as the ground plane for the capture volume.
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[[Main Page|Main page]] → [[Calibration]] → [[Calibration Squares]]
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==Custom Calibration Square==
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During [[Calibration]] process, a calibration square is used to define global coordinate axes as well as the ground plane for the capture volume. Each calibration square has different vertical offset value. When defining the ground plane, Motive will recognize the square and ask user whether to change the value to the matching offset.
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=Custom Calibration Square=
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{|class="wikitable" style = "margin: auto; width: 60%;"
 
{|class="wikitable" style = "margin: auto; width: 60%;"
 
|+Calibration Squares
 
|+Calibration Squares
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* Short arm: Positive x
 
* Short arm: Positive x
 
* Vertical offset: 11.5 mm
 
* Vertical offset: 11.5 mm
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* Marker size: 9.5 mm (diameter)
 
|-
 
|-
 
|[[Image:calibrationSquareCS200.jpg|200 px]]
 
|[[Image:calibrationSquareCS200.jpg|200 px]]
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* Short arm: Positive x
 
* Short arm: Positive x
 
* Vertical offset: 19 mm
 
* Vertical offset: 19 mm
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* Marker size: 14 mm (diameter)
 
|-
 
|-
 
|[[Image:Calib_Square.jpg|200 px]]
 
|[[Image:Calib_Square.jpg|200 px]]
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* Short arm: Positive x
 
* Short arm: Positive x
 
* Vertical offset: 45 mm
 
* Vertical offset: 45 mm
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* Marker size: 19 mm (diameter)
 
|-
 
|-
 
|[[File:Motive1.7Ori.png|200 px]]
 
|[[File:Motive1.7Ori.png|200 px]]
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|}
 
|}
  
==Coordinate System==
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=Coordinate System (Motive 1.7+)=
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For Motive 1.7 or higher, Right-Handed Coordinate System is used as the standard, across internal and exported formats and data streams. As a result, Motive 1.7 now interprets the L-Frame differently than previous releases:
 
For Motive 1.7 or higher, Right-Handed Coordinate System is used as the standard, across internal and exported formats and data streams. As a result, Motive 1.7 now interprets the L-Frame differently than previous releases:
  
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</table>
 
</table>
  
 
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If you wish to obtain the same coordinate system conventions as in the old releases (Motive 1.6 and earlier), you can simply rotate the L-Frame 180° around the Y-axis before setting the ground plane:
The simplest method to account for this change is to '''rotate the L-Frame 180° during calibration''' (rotating "around the Y axis"). If the L-Frame is not rotated during calibration, Motive will display inverted global coordinates when comparing the same data in Motive 1.7 and Motive 1.6 and earlier:
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<center>[[File:Motive1.7Coordinate-LFrameImplications.png|400px]]    [[File:Motive1.6Coordinate-LFrameImplications.png|400px]]</center>
 
<center>[[File:Motive1.7Coordinate-LFrameImplications.png|400px]]    [[File:Motive1.6Coordinate-LFrameImplications.png|400px]]</center>

Latest revision as of 19:47, 27 February 2017

Main pageCalibrationCalibration Squares

During Calibration process, a calibration square is used to define global coordinate axes as well as the ground plane for the capture volume. Each calibration square has different vertical offset value. When defining the ground plane, Motive will recognize the square and ask user whether to change the value to the matching offset.

Custom Calibration Square[edit]


Calibration Squares
Square Type Descriptions
CalibrationSquareCS100.jpg CS-100: Used to define a ground plane in a small, precise motion capture volumes.
  • Long arm: Positive z
  • Short arm: Positive x
  • Vertical offset: 11.5 mm
  • Marker size: 9.5 mm (diameter)
CalibrationSquareCS200.jpg CS-200:
  • Long arm: Positive z
  • Short arm: Positive x
  • Vertical offset: 19 mm
  • Marker size: 14 mm (diameter)
Calib Square.jpg CS-400: Used for general for common mocap applications. Contains knobs for adjusting the balance as well as slots for aligning with a force plate.
  • Long arm: Positive z
  • Short arm: Positive x
  • Vertical offset: 45 mm
  • Marker size: 19 mm (diameter)
Motive1.7Ori.png Legacy L-frame square: Legacy calibration square designed before changing to the Right-hand coordinate system.
  • Long arm: Positive z
  • Short arm: Negative x

Coordinate System (Motive 1.7+)[edit]


For Motive 1.7 or higher, Right-Handed Coordinate System is used as the standard, across internal and exported formats and data streams. As a result, Motive 1.7 now interprets the L-Frame differently than previous releases:

Motive 1.6 and earlier

L-Frame long (marked Z) "leg" interpreted as -Z, L-Frame short (unlabeled) leg interpreted as +X

Motive 1.7+

L-Frame long (marked Z) "leg" interpreted as +Z, L-Frame short (unlabeled) leg interpreted as -X

Motive 1.6 L-Frame
Motive 1.7 L-Frame

If you wish to obtain the same coordinate system conventions as in the old releases (Motive 1.6 and earlier), you can simply rotate the L-Frame 180° around the Y-axis before setting the ground plane:

Motive1.7Coordinate-LFrameImplications.png Motive1.6Coordinate-LFrameImplications.png