What is a limitation of camera-based motion capture systems that wearable sensors help address?

• A. They work well outside labs without setup.
• B. They are inexpensive and easy to deploy in any setting.
• C. They provide continuous monitoring without laboratory constraints.
• D. They require controlled lab settings and are less practical for long-term monitoring.

Answer: (D)

Camera-based motion capture systems rely on fixed cameras, careful setup, and markers that must have a clear line of sight in a controlled environment. Any occlusion, lighting change, or miscalibration can disrupt the data, making long recording sessions and use outside a lab impractical. Wearable sensors solve this by placing sensors directly on the body, so motion is captured without relying on cameras or a predefined capture space, enabling data collection in real-world settings and over extended periods. This is why the limitation being addressed is the requirement for a controlled lab setup and the impracticality of long-term monitoring with camera systems.