Data quality assessment is a key issue, in order to broaden the applicability of iris biometrics
to unconstrained imaging conditions. Previous research efforts sought to use visible …

This dissertation develops an innovative approach towards less-constrained iris biometrics.
Two major contributions are made in this research endeavor:(1) Designed an award …

This paper presents an examination of a selection of images taken from the UBIRIS. v2
dataset to explore the characteristics of point-source reflections present in the images …

Efficient and robust segmentation of iris images captured in the uncontrolled environments is
one of the challenges of non-cooperative iris recognition systems. We address this problem …

The vein structure in the sclera, the white and opaque outer protective covering of the eye, is
anecdotally stable over time and unique to each person. As a result, it is well suited for use …

Eye center detection is an essential module in iris segmentation and gaze tracking. It is more
challengeable to achieve this goal using a usual web camera under natural illumination …