US 10,891,479 B2
Image processing method and system for iris recognition
Istvan Andorko, Galway (IE); Alexandru Drimbarean, Galway (IE); and Peter Corcoran, Claregalway (IE)
Assigned to FotoNation Limited, Galway (IE)
Filed by FotoNation Limited, Galway (IE)
Filed on Nov. 8, 2019, as Appl. No. 16/679,041.
Application 16/679,041 is a continuation of application No. 15/948,199, filed on Apr. 9, 2018, granted, now 10,474,894.
Application 15/948,199 is a continuation of application No. 15/192,186, filed on Jun. 24, 2016, granted, now 9,940,519, issued on Apr. 10, 2018.
Prior Publication US 2020/0074174 A1, Mar. 5, 2020
Int. Cl. H04N 5/33 (2006.01); G06K 9/00 (2006.01); G06K 9/20 (2006.01); G06T 7/73 (2017.01); G06K 9/46 (2006.01); G06T 7/11 (2017.01); G06T 7/33 (2017.01)
CPC G06K 9/00617 (2013.01) [G06K 9/00604 (2013.01); G06K 9/2027 (2013.01); G06K 9/4604 (2013.01); G06T 7/11 (2017.01); G06T 7/337 (2017.01); G06T 7/74 (2017.01); H04N 5/33 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An image processing method for iris recognition of a predetermined subject, comprising:
acquiring through an image sensor, a probe image illuminated by an infra-red (IR) illumination source;
determining whether ambient light exceeds a threshold;
when ambient light is determined to not exceed the threshold,
increasing IR illumination until a probe image acquired through the image sensor comprises one or more eye regions and is overexposed until skin portions of the image are saturated;
identifying one or more iris regions within one or more eye regions of the probe image; and
when ambient light is determined to exceed the threshold, identifying one or more iris regions within one or more eye regions of the probe image, the probe image being overexposed until skin portions of the probe image are saturated; and
analyzing the one or more identified iris regions to detect whether they belong to the predetermined subject.