Patent ID: 11915521
Assignee: TOBII AB
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A method for processing a gaze signal in an eye tracking system, the method comprising:
receiving a first image of a user's eye captured at a first point in time and a second image of the user's eye captured at a second point in time subsequent to the first point in time;
determining, based on the first image and the second image, whether eye movement of the user's eye is in fixation or not, wherein the determining comprises ascertaining that a pixel has changed on condition that a difference between a value of the pixel in the first image and a value of the corresponding pixel in the second image is above a first predetermined threshold, and
wherein the determining further comprises ascertaining that the eye movement of the user's eye is in fixation on condition that an accumulated number of changed pixels of the images is below a second predetermined threshold;
on condition that the eye movement of the user's eye is in fixation, applying a filter on the gaze signal, wherein the filter is adapted to decrease variance in the gaze signal.