Which statement best captures the limitation of camera-based MOCAP compared to wearable sensors?

• A. They are more portable than wearables.
• B. They are inexpensive for home use.
• C. They can be used anywhere without setup.
• D. They are often restricted to laboratory settings and cannot easily support continuous, natural-environment monitoring.

Answer: (D)

Camera-based motion capture hinges on fixed cameras tracking markers or body landmarks, which requires a controlled space with proper camera placement, lighting, and calibration. Because the system needs line of sight to all markers, it naturally confines data collection to a predefined capture volume in a lab or studio and struggles with occlusions, lighting changes, and extending into real-world environments. Wearable sensors, by contrast, travel with the person and don’t depend on cameras or visibility, making continuous, natural-environment monitoring feasible. That’s why this option best captures the main limitation: camera-based systems are typically lab-bound and not suitable for ongoing monitoring outside that setting. The other statements incorrectly portray camera mocap as more portable, cheaper for home use, or usable anywhere without setup.