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v3.1
v3.1
  • OptiTrack Documentation
  • WHAT'S NEW
    • What's New in Motive 3.1
  • QUICK START GUIDES
    • Quick Start Guide: Getting Started
    • Quick Start Guide: Prime Color Camera Setup
    • Quick Start Guide: Precision Capture
    • Quick Start Guide: Tutorial Videos
    • Quick Start Guide: Active Marker Tracking
    • Quick Start Guide: Outdoor Tracking Setup
  • HARDWARE
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        • Adjusting Global Origin for Tracking Bars
    • Prepare Setup Area
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    • Ethernet Camera Network Setup
      • General Overview and Specs
      • Windows 10 Network Settings
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        • Transforming Coordinate System: Global to Local
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  • MOTIVE
    • Installation and License Activation
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    • Calibration
      • Continuous Calibration
      • Continuous Calibration (Info Pane)
      • Calibration Squares
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  • PLUGINS
    • OptiTrack Blender Plugin
      • OptiTrack Blender Plugin
    • OptiTrack Unreal Engine Plugin
      • Unreal Engine: OptiTrack Streaming Client Plugin
      • Unreal Engine: OptiTrack Live Link Plugin
        • Quick Start Guide: Real-Time Retargeting in Unreal Engine with Live Link Content
        • Unreal Editor for Fortnite (UEFN): OptiTrack Plugin for Live Link Hub
        • Unreal Engine: Live Link Camera Stream Setup
        • Live Link Content: Active Puck Static Meshes
      • Unreal Engine: MotionBuilder Workflow
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    • OptiTrack Unity Plugin
      • Unity: HMD Setup
    • OptiTrack OpenVR Driver
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      • Autodesk Maya: OptiTrack Insight VCS Plugin
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      • Autodesk MotionBuilder Plugin
      • Autodesk MotionBuilder: OptiTrack Skeleton Plugin
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    • OptiTrack Peripheral API
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      • Houdini 19 Integration
  • ACTIVE COMPONENTS
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      • Information for Assembling the Active Tags
      • Manus Glove Setup
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  • SYNCHRONIZATION
    • Synchronization Hardware
      • External Device Sync Guide: eSync 2
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    • Synchronization Setup
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  • VIRTUAL PRODUCTION
    • Unreal Engine: OptiTrack InCamera VFX
    • Entertainment Marker Sets
    • PrimeX 41
  • MOVEMENT SCIENCES
    • Movement Sciences Hardware
      • General Motive Force Plate Setup
      • AMTI Force Plate Setup
      • Bertec Force Plate Setup
      • Kistler Force Plate Setup
      • Delsys EMG Setup
      • NI-DAQ Setup
      • Multiple Device Setup
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    • For Visual3D Users
    • Prime Color Camera Setup
      • Prime Color Setup: Required Components
      • Prime Color Setup: Hardware Setup
      • Prime Color Camera Setup: Camera Settings
      • Prime Color Camera Setup: Prime Color FS Calibration
      • Prime Color Setup: Data Recording / Export
      • Prime Color Camera Setup: FAQ / Troubleshooting
      • Prime Color Camera Setup: Windows Network Settings
  • VIRTUAL REALITY
    • VR Plugins
      • VR Unreal Engine
        • OptiTrack Unreal Engine Plugin
        • Unreal Engine: OptiTrack Live Link Plugin
          • UE5.1 Live Link Retarget External Workaround
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      • VR Unity
        • OptiTrack Unity Plugin
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        • OptiTrack OpenVR Driver
    • VR HMD Setup
      • Unreal Engine: HMD Setup
      • Unity: HMD Setup
      • Manually Calibrating the HMD Pivot Point
      • Sync Configuration with an HTC Vive System
    • SlimX 13
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      • Active Finger Marker Set
    • Synchronization Hardware
      • External Device Sync Guide: eSync 2
      • External Device Sync Guide: OptiHub2
  • ANIMATION
    • Autodesk Maya
      • Autodesk Maya: OptiTrack Insight VCS Plugin
    • Autodesk MotionBuilder
      • Autodesk MotionBuilder Plugin
      • Autodesk MotionBuilder: OptiTrack Skeleton Plugin
      • Autodesk MotionBuilder: OptiTrack Optical Plugin
      • Autodesk MotionBuilder: OptiTrack Insight VCS Plugin
      • Autodesk MotionBuilder: Timecode Data
  • ROBOTICS
    • MoCap4ROS2 Setup
    • OptiTrack Robot Applications
    • Outdoor Tracking Setup
  • DEVELOPER TOOLS
    • Developer Tools Overview
    • Camera SDK
      • Class: cCameraModule
      • Class: cUID
    • Motive API
      • Motive API: Quick Start Guide
      • Motive API Overview
      • Motive API: Function Reference
      • Motive API Camera Calibration
    • NatNet SDK
      • NatNet 4.1
      • NatNet: Class/Function Reference
      • NatNet: Creating a Managed (C sharp) Client Application
      • NatNet: Creating a Native (C++) Client Application
      • NatNet: Data Types
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      • NatNet: Remote Requests/Commands
      • NatNet: Sample Projects
      • NatNet: Unicast Data Subscription Commands
      • Latency Measurements
    • Peripheral API: Glove Devices
  • SKELETON MARKER SETS
    • Full Body
      • Baseline (41)
      • Core (50)
      • Biomech (57)
      • Conventional (39)
    • Full Body + Fingers
      • Baseline + Passive Fingers (49)
      • Baseline + Active Fingers (57)
      • Core + Passive Fingers (54)
      • Core + Active Fingers (62)
    • Upper
      • Baseline Upper (25)
      • Conventional Upper (27)
    • Lower
      • Baseline Lower (20)
      • Helen Hayes Lower (19)
      • Conventional Lower (16)
    • Hand and Fingers
      • Left/Right Hand (4) Active
      • Left/Right Hand (10) Active + Passive
      • Active Finger Marker Set
    • Glove Device Setup
      • Manus Glove Setup
      • StretchSense Glove Setup
    • Rizzoli Marker Sets
    • Entertainment Marker Sets
    • Rigid Body Skeleton Marker Set
  • GENERAL TROUBLESHOOTING
    • Licensing Troubleshooting
    • Windows 11 Optimization for Realtime Applications
    • Network Troubleshooting
    • Troubleshooting Q&A
    • Running Motive on High DPI Displays
    • Firewall Settings
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  • Vertical Offset
  • Coordinate System (Motive 1.7+)

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  1. MOTIVE
  2. Calibration

Calibration Squares

PreviousContinuous Calibration (Info Pane)NextMarkers

Last updated 3 months ago

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During 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.

Square Type
Descriptions

CS-200:

  • Long arm: Positive z

  • Short arm: Positive x

  • Vertical offset: 19 mm

  • Marker size: 14 mm (diameter)

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)

Legacy L-frame square: Legacy calibration square designed before changing to the Right-hand coordinate system.

  • Long arm: Positive z

  • Short arm: Negative x

Custom Calibration square: Position three markers in your volume in the shape of a typical calibration square (creating a ~90 degree angle with one arm longer than the other). Then select the markers to set the ground plane.

  • Long arm: Positive z

  • Short arm: Negative x

When creating a custom ground plane, you can use Motive to help you move the markers to create approximately 90 degree between the 3 markers. This is of course contingent on how good your calibration is, however, this will still give you a fairly accurate starting point when setting your ground plane.

Vertical Offset

Motive accounts for the vertical offset when using a standard OptiTrack calibration square, setting the origin at the bottom corner of the calibration square rather than the center of the marker.

When using a custom calibration square, measure the distance between the center of the marker and the lowest tip at the vertex of the calibration square. Enter this value in the Vertical Offset field in the Calibration pane.

The Vertical Offset property can also be used to place the ground plane at a specific elevation. A positive offset value will set the plane below the markers, and a negative value will set the plane above the markers.

Coordinate System (Motive 1.7+)

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:

The Vertical Offset is the distance between the center of the markers on the and the actual ground and is a required value in setting the global origin.

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)

calibration square
Calibration
Vertical offset of the CS-400 calibration square.
Ground plane marker is offset from the global origin after calibration.
Motive 1.7+ L-Frame long (marked Z) "leg" interpreted as +Z, L-Frame short (unlabeled) leg interpreted as -X