Theia Markerless

Theia Markerless is the leading, scientifically recognised biomechanical modelling software for markerless tracking. It was developed for use in clinics, research, sports, entertainment and engineering, and enables realistic motion analysis with minimal effort.

The integration of Theia software into the Vicon Nexus ecosystem enhances it with valuable features by enabling seamless integration of force plates, EMG data and prop tracking.

No markers. No sensors. No compromises.

Instead of markers or sensors, Theia uses video cameras and advanced AI algorithms to automatically detect and track anatomical points on the body. The software uses this information to create a complete 3D skeletal model and provides detailed biomechanical data without imposing any restrictions on the test subjects.

The system recognises multiple people simultaneously, works indoors and outdoors, and can be seamlessly integrated into existing analysis workflows, e.g. with Vicon Nexus or Contemplas.

We have specialised in the installation and integration of markerless 3D motion capture systems for over five years. Our experience shows that markerless tracking can be used to open up new areas of application.

AI-supported motion detection with over 120 anatomical keypoints
Real-time tracking & batch processing
Precise analysis of gait, running, functional movements, and much more
Ideal for large studies, clinical applications, and sports performance diagnostics

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Hardware & Software

Theia Markerless

What is Theia3D?

Theia3D uses deep learning to automatically detect and analyse human movements. The software creates precise skeletal models, calculates joint angles and segmental movements, and enables the analysis of complex motion sequences, all without the need for markers. It can be launched directly from Vicon Nexus and supports automated workflows, including batch processing and C3D export.

How does calibration work?

Calibration can be performed using a standard calibration rod or the specially developed Theia3D calibration board. The process is fully automated, reducing potential sources of error and ensuring accurate and reliable data acquisition.

How is the recording made?

Motion capture is performed using several video cameras in the test subjects’ natural environment, without the need for markers or special clothing. The test subjects wear everyday clothing and move freely. This enables realistic analysis under practical conditions.

Analysis

Theia3D automatically detects 124 key anatomical points and uses them to create precise 3D skeletal models. The software is designed for a wide range of applications, including functional motion analysis, sports performance, biomechanical research and custom commercial solutions. Evaluation is automated, and the results can be exported and further processed in various formats, including .c3d.

Markerless full-body tracking in real time with consistent recording and playback.
Instant playback of recordings and streaming from the game engine.
Simultaneous tracking of performers without markers and props with markers.
Automated gap filling and data analysis for efficient post-processing
Fully scriptable (Python/HSL) with direct retargeting to character F