"Hallucinating irises" - Dealing with partial & occluded iris regions

Taihei Munemoto, Yung Hui Li, Marios Sawides

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

6 Scopus citations

Abstract

In this paper, we examine a novel image-filling algorithm to fill the occluded and partial regions of the iris. In iris recognition, these occlusions naturally appear due to eye-lids being partially closed, eye movements and eye-lashes. Additionally, specular reflections arising from the iris-camera illuminator are present and produce occlusion artifacts on the iris region. In the polar representation of iris images, additional 'nuisance' parameters include image regions containing the pupil and sclera due to inaccurate iris segmentations. Thus, for accurate iris recognition, it is important to reduce the effect of these nuisance parameters so that the performance of the iris recognition system can be maximized. Typically, a mask region (automatic or manual) is defined to ignore occluded or affected iris regions from such nuisance artifacts. However, in the feature extraction stage, especially using Gab or type extraction, the features near the edge of these artifacts are also affected due to the tail supports of these filters that overflow on occluded irises. We propose a novel method for filling in the occluded regions by synthesizing the iris pattern from this current exemplar image and show that a significant improvement on the Iris Challenge Evaluation (ICE) dataset can be made.

Original languageEnglish
Title of host publicationBTAS 2008 - IEEE 2nd International Conference on Biometrics
Subtitle of host publicationTheory, Applications and Systems
DOIs
StatePublished - 2008
EventBTAS 2008 - IEEE 2nd International Conference on Biometrics: Theory, Applications and Systems - Arlington, VA, United States
Duration: 29 Sep 20081 Oct 2008

Publication series

NameBTAS 2008 - IEEE 2nd International Conference on Biometrics: Theory, Applications and Systems

Conference

ConferenceBTAS 2008 - IEEE 2nd International Conference on Biometrics: Theory, Applications and Systems
Country/TerritoryUnited States
CityArlington, VA
Period29/09/081/10/08

Fingerprint

Dive into the research topics of '"Hallucinating irises" - Dealing with partial & occluded iris regions'. Together they form a unique fingerprint.

Cite this