Title :
Off-angle iris correction using a biological model
Author :
Thompson, John ; Santos-Villalobos, Hector ; Karakaya, Mahmut ; Barstow, Del ; Bolme, David ; Boehnen, Christopher
Author_Institution :
Oak Ridge Nat. Lab., Oak Ridge, TN, USA
fDate :
Sept. 29 2013-Oct. 2 2013
Abstract :
This work implements an eye model to simulate corneal refraction effects. Using this model, ray tracing is performed to calculate transforms to remove refractive effects in off-angle iris images when reprojected to a frontal view. The correction process is used as a preprocessing step for off-angle iris images for input to a commercial matcher. With this method, a match score distribution mean improvement of 11.65% for 30 degree images, 44.94% for 40 degree images, and 146.1% improvement for 50 degree images is observed versus match score distributions with unmodified images.
Keywords :
eye; image matching; iris recognition; ray tracing; transforms; biological model; commercial matcher; corneal refraction effects simulation; correction process; eye model; image preprocessing step; iris recognition; match score distribution mean improvement; off-angle iris correction; off-angle iris images; ray tracing; refractive effects removal; transforms; Cameras; Cornea; Image segmentation; Iris recognition; Ray tracing; Shape; Transforms;
Conference_Titel :
Biometrics: Theory, Applications and Systems (BTAS), 2013 IEEE Sixth International Conference on
Conference_Location :
Arlington, VA
DOI :
10.1109/BTAS.2013.6712694