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Theia Axiom - v2025
Theia Axiom - v2025
  • Theia3D Documentation
    • What's New
    • Theia3D Documentation
    • Welcome to Theia3D
    • Keyboard Shortcuts
    • Getting Started
      • System Requirements
      • Installation
      • License Activation
      • Startup Window
      • Theia3D Basics
      • Camera Setup Tips
      • Tutorial Videos
    • Data Collection
      • Data Collection Principles
      • Recording Intrinsic Lens Calibrations
      • Recording Extrinsic Chessboard Calibrations
      • Recording Extrinsic Object Calibrations
    • Theia3D Interface
    • Theia3D Dropdown Menus
      • File Menu
      • Analyze Menu
      • Display Menu
      • Results Menu
      • Calibration Menu
        • Check Calibration
        • Lens Calibration
        • Chessboard Calibration
        • Object Calibration
        • Adjust Calibration
      • Tools Menu
        • Check Synchronization
        • Organize Videos
        • Format Sony Multicam
        • Assign Calibration Files
        • Modify People IDs
        • Toggle Views
        • Display Video Metadata
        • Enhance Videos
      • Settings Menu
        • Settings Menu
        • Analysis Preferences
        • Rendering Preferences
        • Setup Preferences
      • Help Menu
    • Theia Model Description
      • Default Model Description
      • Full Body Model Description
      • Separate Arm and Head Model Description
    • Data Formats
      • Video Data
      • Calibration Files
      • Theia3D Workspaces
      • C3D Files
      • FBX Files
      • JSON Files
      • Video Overlays
    • Theia3D Batch
      • Theia3D Batch Interface
      • Setting Up a Batch
      • File Menu
      • Help Menu
      • Settings
      • Trials
      • Preferences
      • Batch Processing Outputs
    • Camera System Requirements
    • Sony Camera Package
      • Components
      • System Setup
      • Data Collection
  • Troubleshooting
    • Troubleshooting Documentation
    • Error Messages
      • License Errors
        • License Activation Failed
      • Organize Data Errors
        • Input directory has no mp4 or avi files
      • Load Video Data Errors
        • Videos not formatted properly
        • Only [#] videos found
        • Videos are not the same length
        • Unsupported video codec detected
        • Invalid video
      • Load Calibration File Errors
        • Unable to load calibration
        • Required camera parameter groups not present
      • Load Workspace Errors
        • Selected folder does not contain a valid Theia workspace
        • Incompatible workspace
      • Calibration Errors
        • Camera extrinsics optimization step 3 failed
        • Unable to detect chessboard in overlapping frames for all cameras
        • Too few chessboards detected (<25)
        • Field of view coverage insufficient (<60%)
      • Movement Trial Processing Errors
        • Track people not complete
        • Abnormally high tracking errors
    • Visible Issues
      • Coordinate system is out of place in one camera view
      • Coordinate system is in different positions and/or orientations in all camera viewse
      • Coordinate system is in an incorrect but consistent position and/or orientation in all views
      • Skeleton is consistently outside the body
      • Skeleton is momentarily incorrect
      • Skeleton is incomplete
      • Skeleton is completely missing
      • Skeleton is jittery
    • Sony Troubleshooting
      • Initialization Issues
      • Unstable Connection
    • Other Issues
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On this page
  • GPU Selection‍
  • Person Detector Size
  • Joint Detector Size
  • Listen Mode

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  1. Theia3D Documentation
  2. Getting Started

Startup Window

PreviousLicense ActivationNextTheia3D Basics

Last updated 16 days ago

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Theia3D application startup window.

The startup window appears if Select GPUs on launch is enabled in the Theia3D .

GPU Selection‍

Select which graphics card(s) to use when running Theia3D.

Person Detector Size

Select which person detector to use when running Theia3D, and set the Skip frames count.

  • Small: fastest, may be slightly less accurate than Default or Large.

  • Default: recommended.

  • Large: slowest, may be slightly more accurate than Default or Small (currently disabled).

Skip frames sets the frame interval used during the analysis process to identify and track people. Default is 1, Maximum is 5. Increasing the Skip Frames value will speed up the analysis. The Skip frames value should not be used for fast movements recorded at relatively low frame rates, or movements with multiple closely-interacting individuals, as the person identification may be affected.

Joint Detector Size

Select which joint detector to use when running Theia3D.

  • Small: fastest, may be slightly less accurate than Large (currently disabled).

  • Large: (default) slowest, may be slightly more accurate than Small.

  • Add Hands: (available as a license add-on by special request) Include hand model, which improves hand tracking through localization. Requires camera views that are positioned specifically to capture the hands and upper body. Please reach out to support@theiamarkerless.com for more information.

Listen Mode

Available as a license add-on by special request.

Listen Mode allows a directory to be selected where data is saved during data collection. The selected directory will be actively monitored for new, unprocessed data which will be automatically analyzed as it is detected. This allows data to be processed during an active data collection session, enabling all processing to be completed by the end of the collection session.

setup preferences