To achieve highly accurate eye tracking using the Pupil Core system, you must systematically manage the hardware positioning, software settings, and the calibration process. Pupil Capture relies on a clean, unobstructed view of the eye to fit a precise mathematical ellipse around the pupil.
Here is the comprehensive guide to setting up Pupil Capture for research-grade accuracy. Hardware Adjustment and Fit
Proper physical placement prevents data loss caused by headset slippage or poor viewing angles.
Headset Placement: Put on the Pupil Core headset, ensuring the nose bridge is stable and there is a small gap between the frame and the forehead.
Camera Articulation: Loosen the camera mount screws and physically orbit the infrared (IR) eye cameras on their ball joints.
Eye Framing: Adjust until the eye window in Pupil Capture shows a completely centered, sharp image of the participant’s eye. If you run out of range, mount the included orange arm extenders.
Stabilization: For screen-based tasks, use a chin rest or head stabilizer to minimize physical movement. Environment and Image Optimization
External light and poor video contrast are the main causes of ellipse-fitting errors. ResearchGate
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