METHOD FOR DETERMINING EYE LOCATION ON A FRONTAL FACE DIGITAL IMAGE TO VALIDATE THE FRONTAL FACE AND DETERMINE POINTS OF REFERENCE

摘要

A method is described for determining eye location on a frontal face digital image in order to validate the frontal face as such and determine points of reference. The method consists of the following steps: obtain a frontal face digital image that is W pixels wide and H pixels high in grayscale, where the top left vertex of the digital image is considered to be the reference source; detect each eye, starting from a search subimage of the frontal face digital image, delivering approximate coordinates if both eyes have been detected, or an arbitrary predetermined value to indicate no eye detection; locate the iris of each eye, if both eyes have been detected, starting from the approximate coordinates, validating the frontal face digital image by delivering eye positions; or, validate the frontal face digital image if one or both eyes have not been detected by submitting a search subimage defined by an area resulting from centering a square of area L in the original image, where L=0.8×W, delivering coordinates for the eyes.

主权项

1. A digital image processing method for locating eyes on a frontal face digital image, comprising the steps of:
a) obtaining a digital image of a frontal face, W pixels wide and H pixels high, grayscale, where the top left vertex of the digital image is considered as the reference source; b) detecting each eye, starting with a search subimage of the frontal face digital image, delivering approximate coordinates if both eyes have been detected, or an arbitrary predetermined value that indicates no eye detection; c) locating the iris of each eye, if both eyes have been detected, starting from the approximate coordinates, validating the frontal face on the digital image providing eye positions; or d) validating the frontal face digital image, if one or both eyes have not been detected, calculating a search subimage defined by an area resulting from centering a square of area L on the original image, where L=0.8×W, to deliver the coordinates for the eyes.