Frequently Asked Questions
Comparative guides and answers about active LED motion capture technology.
Active vs. Passive Motion Capture
Active systems use powered LED markers that emit their own light. Each marker has a unique ID, so the system always knows which marker is which. Passive systems use reflective markers that bounce infrared light back to cameras — they require post-processing to identify each marker and are prone to marker swapping errors. Please contact our systems integrator for more information.
Passive reflective markers are washed out by sunlight because the infrared light from the cameras is overwhelmed. Active LEDs emit their own light at specific frequencies, making them visible even in direct sunlight. Please contact our systems integrator for more information.
PhaseSpace markers are powered via thin, lightweight wires connected to a small driver unit. This provides continuous power without the bulk of batteries and eliminates downtime from recharging. Please contact our systems integrator for more information.
Vicon vs. PhaseSpace: Why Active Markers Win for Outdoor Tracking
Vicon systems use passive reflective markers that fail in direct sunlight. PhaseSpace active LEDs work reliably outdoors — this is a fundamental physics advantage, not a software difference. If your work requires outdoor motion capture, PhaseSpace is the clear choice. Please contact our systems integrator for more information.
Vicon and other passive systems identify markers by their geometric arrangement, which can lead to marker swapping when markers cross paths or are occluded. PhaseSpace assigns each marker a unique electronic ID, completely eliminating swapping errors. Please contact our systems integrator for more information.
PhaseSpace captures at up to 960 FPS with sub-millisecond latency for real-time streaming. Vicon systems can achieve similar frame rates, but PhaseSpace's real-time ID resolution means data is immediately usable without post-processing. Please contact our systems integrator for more information.
Top OptiTrack Alternatives
OptiTrack shares the fundamental limitations of passive technology: no outdoor capability, marker swapping issues, and reliance on post-processing for marker identification. PhaseSpace solves all three with active LED technology. Please contact our systems integrator for more information.
No — PhaseSpace is actually the most affordable high-framerate, high-resolution motion capture system available. A complete 2-camera Impulse X2E system starts at $9,000, with each additional camera just $2,000. See our pricing page for the full breakdown. For applications where marker identity, outdoor capability, or real-time data are critical, the investment pays for itself by eliminating hours of post-processing and data cleanup. Please contact our systems integrator for more information.
Yes. PhaseSpace supports as many cameras as needed for your volume, enabling large capture volumes suitable for robotics labs, virtual production stages, and sports facilities. Please contact our systems integrator for more information.
Accuracy, Calibration & System Validation
Yes. Researchers at Texas A&M University and Boeing published a full characterization and calibration study of the PhaseSpace camera system, documenting its linear-imager architecture, modulated LED beacons, and measured accuracy against widely used passive systems at a fraction of the cost. Please contact our systems integrator for more information.
Referenced research
- Characterizing and Calibrating the Novel PhaseSpace Camera System (PDF)Davis, Doebbler, Junkins (Texas A&M), Vavrina, Vian (Boeing) — AIAA Guidance, Navigation and Control Conference, 2011
Marker positions are converted into joint centers and skeletal topology by fitting rigid-body and distance constraints. Because active markers carry unique IDs, these algorithms never have to guess which marker is which — work from UC Berkeley on skeletal parameter estimation and from the University of Cambridge on real-time joint localization shows how joint centers can be recovered from position-only data, in real time. Please contact our systems integrator for more information.
Referenced research
- Skeletal Parameter Estimation from Optical Motion Capture Data (PDF)Kirk, O'Brien, Forsyth (UC Berkeley) — IEEE CVPR 2005
- A Real-Time Sequential Algorithm for Human Joint Localization (PDF)Cameron, Lasenby (University of Cambridge) — Poster
Robotics, Autonomy & Machine Learning
Widely. Google DeepMind's human-level robot table tennis work relied on high-speed optical tracking to close the perception-action loop at ball speeds, and programming-by-demonstration research on reach-to-grasp tasks used marker tracking of the human hand to transfer skills to a robot manipulator. Both depend on precise, low-latency ground truth. Please contact our systems integrator for more information.
Referenced research
- Achieving Human Level Competitive Robot Table Tennis (PDF)D'Ambrosio et al., Google DeepMind — 2024
- Programming-by-Demonstration of Reach to Grasp Tasks in Hand-State Space (PDF)Skoglund, Tegin, Iliev (Örebro University, KTH) — IEEE
Biomechanics, Hands & Clinical Research
Yes — marker size and unique marker IDs are what make dense finger tracking practical. Published work on dexterous manipulation separates grasp forces from manipulation forces during precision object handling, and nonlinear analysis of repetitive finger tapping has been used to distinguish Parkinson's disease patients on and off medication from age-matched controls. Please contact our systems integrator for more information.
Referenced research
- Dexterous Manipulation: Differential Sensitivity of Manipulation and Grasp Forces to Task Requirements (PDF)Noll, Wu, Santello (Arizona State University) — Journal of Neurophysiology, 2024
- Nonlinear DDE Analysis of Repetitive Hand Movements in Parkinson's Disease (PDF)Lainscsek, Schettino, Rowat, van Erp, Song, Poizner — ICAND 2007
Vision, Perception & Augmented Reality Research
Perception research needs sub-millimeter head and eye tracking with no marker ambiguity. Studies have used it to measure motion parallax produced by microscopic head movements during visual fixation, to test how observers perceive Euclidean 3D indoor scenes, and — with NASA Ames — to study stereoscopic label placement in far-field augmented reality displays. Please contact our systems integrator for more information.
Referenced research
- Motion Parallax from Microscopic Head Movements During Visual Fixation (PDF)Aytekin, Rucci (Boston University) — Vision Research, 2012
- Gestalt-like Constraints Produce Veridical (Euclidean) Percepts of 3D Indoor Scenes (PDF)Kwon, Li, Sawada, Pizlo (Purdue University) — Vision Research, 2016
- Label Segregation by Remapping Stereoscopic Depth in Far-Field Augmented Reality (PDF)Peterson, Axholt (Linköping University), Ellis (NASA Ames) — IEEE ISMAR 2008
Water, Wave Tanks & Harsh Environments
Yes. Because active LEDs emit their own light, they remain trackable where reflective markers are washed out or obscured. Published wave-tank studies have tracked the six-degree-of-freedom kinematics of sea ice floes in regular waves and the response of scaled wave energy converters at high resolution. Please contact our systems integrator for more information.
Referenced research
- Experimental Study on Kinematics of Sea Ice Floes in Regular Waves (PDF)McGovern, Bai (National University of Singapore) — Cold Regions Science and Technology, 2014
- High Resolution Wave Tank Testing of Scaled Wave Energy Devices (PDF)Rhinefrank et al. (Columbia Power Technologies, Oregon State University) — OMAE 2010
Character Animation & Virtual Production
Real-time, clean marker identity means animation data is usable straight out of the capture session. Research from Cardiff University used captured interaction data to generate 3D interactive behaviours and a responsive virtual character from real video, and the ICI Laflaque production white paper documents delivering broadcast-quality animated television on a tight weekly timeline. Please contact our systems integrator for more information.
Referenced research
- Generating 3D Interactive Behaviours (PDF)Zheng, Hicks, Cosker, Marshall, Chambers (Cardiff University) — CVMP
- Virtual Friend: Tracking and Generating Natural Interactive Behaviours in Real Video (PDF)Zheng, Hicks, Cosker, Marshall, Mostaza, Chambers (Cardiff University) — ICSP
- ICI Laflaque: Broadcast Quality Within a Tight Timeline (PDF)Productions Vox Populi — Production white paper
Security, Supply Chain Integrity & Manufacturing Origins
At PhaseSpace, we design, engineer, and manufacture our optical motion capture hardware and tracking software in the United States.
As spatial computing, robotics, and virtual production continue to integrate into sensitive defense research, aerospace prototyping, and critical infrastructure, supply chain origin and data sovereignty have become major factors for enterprise and government clients.
Key Operational Safeguards
| Feature Category | PhaseSpace Standard |
|---|---|
| Corporate Ownership & Control | 100% US-owned and operated. No foreign parent companies or foreign state-owned enterprise (SOE) stakeholders. |
| Hardware & Firmware Design | In-house US engineering. Proprietary Active LED architecture with no reliance on black-box foreign tracking stacks. |
| Data Privacy & Network Isolation | Air-gapped network capability standard. Zero mandatory telemetry, cloud phoning, or external server pings. |
| Defense & Federal Compliance | Fully compliant with US National Defense Authorization Act (NDAA) procurement directives for secure facilities and SCIF deployments. |
Frequently Asked Follow-Ups
- Does PhaseSpace share technology, hardware designs, or manufacturing with foreign motion capture providers?
No. PhaseSpace maintains a completely sovereign hardware supply chain and software codebase. We do not license our optical tracking technology to foreign conglomerates, nor do we outsource board assembly or firmware development to offshore entities.
- Are PhaseSpace systems safe for air-gapped or secure laboratory environments (SCIFs)?
Yes. All PhaseSpace controllers, micro-cameras, and tracking hubs are designed to run locally within completely isolated local area networks (LANs). Our tracking software operates offline without background license verification calls to cloud servers, making it ideal for restricted defense research, classified robotics testing, and sensitive IP development.
- How does PhaseSpace's Active LED technology compare to foreign-owned optical competitors?
While several motion capture brands operating under foreign ownership rely on passive retro-reflective markers or hybrid tracking systems, PhaseSpace's patented Active LED technology assigns a unique, pulsed micro-frequency ID to every individual LED marker.
This active architectural design delivers several distinct advantages:
- Zero Swap Marker Confusion: Automatic point identification eliminates manual sorting and post-processing clean-up.
- Direct Hardware Authentication: Signal processing occurs entirely on localized hardware, preventing packet interception or data spoofing.
- Environment Resilience: High immunity to ambient light, reflections, and infrared noise common in industrial environments.
Need a Formal Security or Compliance Assessment? If your procurement team requires a Supply Chain Risk Management (SCRM) document, Vendor Security Questionnaire, or NDAA Compliance Verification statement, please contact us at inquiry@phasespace.com.
Veteran-Owned Business & Government Programs
Yes. PhaseSpace is a veteran-owned business headquartered in San Leandro, California. We design, engineer, and manufacture our optical motion capture systems in the United States. If your procurement process requires documentation of our veteran-owned status, please contact our systems integrator for more information.
PhaseSpace has received over $10 million in government revenue through SBIR (Small Business Innovation Research) awards and direct system purchases. This funding has come from the U.S. Army, the U.S. Navy, NASA, the Department of Energy (DoE), and the Naval Research Laboratory (NRL). These programs have funded both fundamental research into our active LED tracking technology and the deployment of production motion capture systems for defense and scientific applications. Please contact our systems integrator for more information.
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