Locating the Iris: A First Step to Registration and Identification
نویسندگان
چکیده
This paper presents a method for locating the iris borders in images of the cornea. It uses a combination of a priori information, statistics and active contours to both find the iris borders and assess its own success or failure. When applied to 107 images from 11 different people with varying eye colours including light blue and dark brown the algorithm reports 7 images for which it failed to find the borders, one of which was a false negative. In the other 100 images, the algorithm located the iris borders with average estimated errors of 5.0 pixels for the left iris-sclera border, 3.4 pixels for the right iris-sclera border and 2.1 pixels for the pupil-iris border. There were no false positive results.
منابع مشابه
Robust Iris Recognition in Unconstrained Environments
A biometric system provides automatic identification of an individual based on a unique feature or characteristic possessed by him/her. Iris recognition (IR) is known to be the most reliable and accurate biometric identification system. The iris recognition system (IRS) consists of an automatic segmentation mechanism which is based on the Hough transform (HT). This paper presents a robust IRS i...
متن کاملGenetic Variation within Iranian Iris Species Using Morphological Traits
Iris belongs toIridaceae family and it is monocotyledon. Iris is one of the important ornamental and medicinal plants. 34 iris genotypes (14 species) collected from different provinces of Iran were planted at National Institute of Ornamental Plants (NIOP) Iran. All of the species evaluated for 15 quantitative traits and 30 qualitative traits. Results showed that the highest positive correlation...
متن کاملA two-step method for damage identification and quantification in large trusses via wavelet transform and optimization algorithm
In the present study, a two-step approach for damage prognosis in long trusses is suggested in which the first step deals with locating probable damages by wavelet transform (WT) and static deflection derived from modal data with the intention of declining the subsequent inverse problem variables. Then, in the second step, optimization based model updating method using Artificial Bee Colony (AB...
متن کاملIdentification of suitable sites for subsurface flow harvesting using underground dam (Case study: Border basins of Torbat-e-Jam County)
Every year, large amounts of the country's water resources leave the country through political borders. Subsurface water is part of these resources that flows on the dry bed of rivers and becomes inaccessible without proper exploitation. Since Iran has many common borders with neighboring countries, it is necessary to pay attention to this issue. One of the appropriate solutions to prevent the ...
متن کاملطراحی سامانه ثبت خودکشی در کشور
Objectives: The goal of the present study was to design a registration system for recording suicide in Iran, capable of designing identification pathways, registration, and report and follow-up of suicide cases and deaths due to suicide. Method: Through library assessments and surveying suicide registration systems in other countries (Denmark, India and WHO), potential methods of suicide in Ira...
متن کامل