An algorithm to automatically detect facial features from color images has been developed. First, face region is located using skin-color information. Then, the iris candidates are extracted from the intensity valleys created from the detected face. Next, the costs for each pair of iris candidates are computed to determine the real pair of irises. Mouth region and corners are detected using col...

Introduction: Human eye colour as a physical trait is based on the developmental biology and genetic determinants of the structure known as the iris, which is part of the uveal tract of the eye. Prediction of human visible characteristics (EVCs) by genotyping informative SNPs in DNA as biological witness opens up a new avenue in the forensic genetic. Variation of iris color rely on the amounts...

OBJECTIVES To determine the role of sympathetic innervation and the effect of topical prostaglandin therapy on iris color in pigmented rabbits. METHODS Twelve Dutch-belted rabbits underwent unilateral superior cervical ganglionectomy (SCGx) at age 1 to 3 months. A second group of 11 rabbits underwent bilateral SCGx at age 1 month and were treated once or twice daily for 6 to 9 months with 1 d...

Biometrics refers to the automatic identification of an individual based on his/her physiological and behavioral traits. Multimodal person authentication system is more effective and more challenging. The fusion of multiple biometric traits helps to minimize the system error rate. Here Iris and Palmprint fusion at Matching Score level is performed. The feature extraction in spatial domain using...

PURPOSE To estimate the magnitude of genetic correlations among five general textural characteristics of the human iris. METHODS Color photographs of iris were available from 100 monozygotic and 99 dizygotic twin pairs. Comparative scales were constructed based on ratings of the subjects' left iris. To explore the genetic and environmental covariation among frequency of Fuchs' crypts, frequen...

PURPOSE To evaluate the relationship between retinal vascular caliber (RVC), iris color, and age-related macular degeneration (AMD) in elderly Irish nuns. METHODS Data from 1233 participants in the cross-sectional observational Irish Nun Eye Study were assessed from digital photographs with a standardized protocol using computer-assisted software. Macular images were graded according to the m...

A system has been developed that automatically extracts the iris region from photographs, computes the iris color in CIE u ́v ́ diagram color space, and corrects the color based on a standard calibration target. This system has advantages over previous manual methods in that it (1) is much less time-consuming because it is fully automatic, (2) corrects for the variability inherent in a film-based...

This paper explores the possibility of using multispectral iris information to enhance the recognition performance of an iris biometric system. Commercial iris recognition systems typically sense the iridal reflection pertaining to the near-infrared (IR) range of the electromagnetic spectrum. This work examines the iris information represented in the visible and IR portion of the spectrum. It i...

Th is article p resents a robust method for detecting iris features in frontal face images based on circular Hough transform. The software of the applicat ion is based on detecting the circles surrounding the exterio r iris pattern from a set of facial images in d ifferent color spaces. The circular Hough transform is used for this purpose. First an edge detection technique is used for finding ...