Patent ID: 9119570
Filing Date: 2015-09-01
Classification: A61B,G06K,G06T

Abstract:
1. A method for monitoring the movement of eyeball, comprises the following steps: collecting an image frame of pupil; extracting a pupil pixel set (S) according to a predetermined threshold; extracting a boundary value of the pupil pixel set; setting a center point based on the boundary value and dividing the pupil pixel set into a first quadrant set (S 1 ), a second quadrant set (S 2 ), a third quadrant set (S 3 ) and a fourth quadrant set (S 4 ), wherein pixels of the first quadrant set (S 1 ) and the third quadrant set (S 3 ) form a straight line, and the pixels of the second quadrant set (S 2 ) and the fourth quadrant set (S 4 ) also form a straight line; calculating the coordinate of crosspoints of the two straight lines and traversing points in the four quadrants, wherein the crosspoints form a pupil center coordinate set (S 5 ); and calculating an average value of horizontal and vertical directions according to the pupil center coordinate set (S 5 ), wherein the average value is a center point position of the pupil.