PUPIL DETECTION DEVICE

摘要

There is provided a pupil tracking device including an active light source, an image sensor and a processing unit. The active light source emits light toward an eyeball alternatively in a first brightness value and a second brightness value. The image sensor captures a first brightness image corresponding to the first brightness value and a second brightness image corresponding to the second brightness value. The processing unit identifies a brightest region at corresponding positions of the first brightness image and the second brightness image as an active light image.

主权项

1. A pupil tracking device, comprising:
an active light source configured to emit light toward an eyeball alternatively in a first brightness value and a second brightness value; an image sensor configured to capture a first brightness image corresponding to the first brightness value and a second brightness image corresponding to the second brightness value; and a processing unit electrically coupled to the image sensor and the active light source, and configured to
calculate a differential image between the first brightness image and the second brightness image, andidentify a darkest region in the differential image as an active light image associated with the active light source when the darkest region in the differential image corresponds to a brightest region in the first brightness image or the second brightness image.