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Iris recognition as a biometric method after cataract surgery

BACKGROUND: Biometric methods are security technologies, which use human characteristics for personal identification. Iris recognition systems use iris textures as unique identifiers. This paper presents an analysis of the verification of iris identities after intra-ocular procedures, when individua...

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Autores principales: Roizenblatt, Roberto, Schor, Paulo, Dante, Fabio, Roizenblatt, Jaime, Belfort, Rubens
Formato: Texto
Lenguaje:English
Publicado: BioMed Central 2004
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC333428/
https://www.ncbi.nlm.nih.gov/pubmed/14748929
http://dx.doi.org/10.1186/1475-925X-3-2
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author Roizenblatt, Roberto
Schor, Paulo
Dante, Fabio
Roizenblatt, Jaime
Belfort, Rubens
author_facet Roizenblatt, Roberto
Schor, Paulo
Dante, Fabio
Roizenblatt, Jaime
Belfort, Rubens
author_sort Roizenblatt, Roberto
collection PubMed
description BACKGROUND: Biometric methods are security technologies, which use human characteristics for personal identification. Iris recognition systems use iris textures as unique identifiers. This paper presents an analysis of the verification of iris identities after intra-ocular procedures, when individuals were enrolled before the surgery. METHODS: Fifty-five eyes from fifty-five patients had their irises enrolled before a cataract surgery was performed. They had their irises verified three times before and three times after the procedure, and the Hamming (mathematical) distance of each identification trial was determined, in a controlled ideal biometric environment. The mathematical difference between the iris code before and after the surgery was also compared to a subjective evaluation of the iris anatomy alteration by an experienced surgeon. RESULTS: A correlation between visible subjective iris texture alteration and mathematical difference was verified. We found only six cases in which the eye was no more recognizable, but these eyes were later reenrolled. The main anatomical changes that were found in the new impostor eyes are described. CONCLUSIONS: Cataract surgeries change iris textures in such a way that iris recognition systems, which perform mathematical comparisons of textural biometric features, are able to detect these changes and sometimes even discard a pre-enrolled iris considering it an impostor. In our study, re-enrollment proved to be a feasible procedure.
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spelling pubmed-3334282004-02-08 Iris recognition as a biometric method after cataract surgery Roizenblatt, Roberto Schor, Paulo Dante, Fabio Roizenblatt, Jaime Belfort, Rubens Biomed Eng Online Research BACKGROUND: Biometric methods are security technologies, which use human characteristics for personal identification. Iris recognition systems use iris textures as unique identifiers. This paper presents an analysis of the verification of iris identities after intra-ocular procedures, when individuals were enrolled before the surgery. METHODS: Fifty-five eyes from fifty-five patients had their irises enrolled before a cataract surgery was performed. They had their irises verified three times before and three times after the procedure, and the Hamming (mathematical) distance of each identification trial was determined, in a controlled ideal biometric environment. The mathematical difference between the iris code before and after the surgery was also compared to a subjective evaluation of the iris anatomy alteration by an experienced surgeon. RESULTS: A correlation between visible subjective iris texture alteration and mathematical difference was verified. We found only six cases in which the eye was no more recognizable, but these eyes were later reenrolled. The main anatomical changes that were found in the new impostor eyes are described. CONCLUSIONS: Cataract surgeries change iris textures in such a way that iris recognition systems, which perform mathematical comparisons of textural biometric features, are able to detect these changes and sometimes even discard a pre-enrolled iris considering it an impostor. In our study, re-enrollment proved to be a feasible procedure. BioMed Central 2004-01-28 /pmc/articles/PMC333428/ /pubmed/14748929 http://dx.doi.org/10.1186/1475-925X-3-2 Text en Copyright © 2004 Roizenblatt et al; licensee BioMed Central Ltd. This is an Open Access article: verbatim copying and redistribution of this article are permitted in all media for any purpose, provided this notice is preserved along with the article's original URL.
spellingShingle Research
Roizenblatt, Roberto
Schor, Paulo
Dante, Fabio
Roizenblatt, Jaime
Belfort, Rubens
Iris recognition as a biometric method after cataract surgery
title Iris recognition as a biometric method after cataract surgery
title_full Iris recognition as a biometric method after cataract surgery
title_fullStr Iris recognition as a biometric method after cataract surgery
title_full_unstemmed Iris recognition as a biometric method after cataract surgery
title_short Iris recognition as a biometric method after cataract surgery
title_sort iris recognition as a biometric method after cataract surgery
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC333428/
https://www.ncbi.nlm.nih.gov/pubmed/14748929
http://dx.doi.org/10.1186/1475-925X-3-2
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