TY - JOUR AU - Rankin, Deborah M. AU - Scotney, Bryan W. AU - Morrow, Philip J. AU - McDowell, Douglas R. AU - Pierscionek, Barbara K. PY - 2010 DA - 2010/07/01 TI - Dynamic iris biometry: a technique for enhanced identification JO - BMC Research Notes SP - 182 VL - 3 IS - 1 AB - The iris as a unique identifier is predicated on the assumption that the iris image does not alter. This does not consider the fact that the iris changes in response to certain external factors including medication, disease, surgery as well as longer term ageing changes. It is also part of a dynamic optical system that alters with light level and focussing distance. A means of distinguishing the features that do not alter over time from those that do is needed. This paper applies iris recognition algorithms to a newly acquired database of 186 iris images from four subjects. These images have greater magnification and detail than iris images in existing databases. Iris segmentation methods are tested on the database. A new technique that enhances segmentation is presented and compared to two existing methods. These are also applied to test the effects of pupil dilation in the identification process. SN - 1756-0500 UR - https://doi.org/10.1186/1756-0500-3-182 DO - 10.1186/1756-0500-3-182 ID - Rankin2010 ER -