blickposition

Blickposition refers to the point in space or on a display where a person is looking at a given moment. In eye-tracking research, it is usually expressed as 2D coordinates on a screen or as 3D directions when head pose is considered. It is estimated from images of the eyes and reflections on the cornea.

Most modern devices use infrared video-based tracking, detecting the pupil center and a corneal reflection (glint) to compute gaze direction. A calibration procedure aligns eye measurements with known screen points, after which gaze coordinates are reported in a chosen reference frame.

Gaze coordinates can be reported as screen-based (x, y in pixels or percentages) or in world coordinates for head-mounted systems. Data may include raw gaze vectors, fixations, and saccades, often analyzed as scanpaths or heatmaps.

Applications span psychology, usability testing, marketing research, and VR/AR. Blickposition helps infer attention, information processing, and user behavior by examining where observers look and for how long.

Limitations include calibration drift, head movement, blinks, glasses, and lighting, which can affect accuracy. Privacy concerns and the need for informed consent are important when collecting gaze data.