Low quality iris images such as blurry, low resolution images with poor illumination create a big challenge for iris recognition systems. We propose a new iris recognition algorithm for enhancement of normalized iris images. Our algorithm is based on the logarithmic image processing (LIP) image enhancement which is used as one of the 3 stages in the enhancement process. Results from processing ...

In this paper, some successful iris recognition methods are listed and their performances are compared. Furthermore, the existing approaches, challenges and conclusion are described. The purpose of ‘Iris Recognition’ is to recognize a person from his/her iris image. Every individual has a unique iris. Iris is an important biometric method with high accuracy, performance and low error rate. Iris...

A modification of iris recognition algorithm using Hermite transform to find iris key points has been developed. The iris image mask for the areas free of eyelids, eyelashes and glares is constructed. The key points are found inside the masked iris region. The use of eye rotation compensation based on Polar Hermite Transform before iris parameterization makes the method more effective. The prop...

• ART-containing integrase inhibitors could be associated with higher incidence of TB-associated IRIS. Prospective studies are needed to better characterize the risk IRIS-TB and determine optimal ART regimen for TB-HIV coinfected patients. Tuberculosis is a immune reconstitution inflammatory syndrome (IRIS) after initiation. Data from all patients newly diagnosed tuberculosis disease uncontroll...

Managing iris prolapse After reading the article by Tint et al., we would like to share some comments and tips about dealing with iris prolapse. First, one principle we obey in iris prolapse is to maintain the anterior chamber pressure at a stable and relatively low level. The goal is to prevent recurrent prolapse and minimize damage to the iris, since we found that with each prolapse and repos...

The iris texture curve features play an important role in iris recognition. Although better performance in terms of recognition effectiveness can be attained using the recognition approach based on the wavelet transform, the iris curve singularity cannot be sparsely represented by wavelet coefficients. In view of the better approximation accuracy and sparse representation ability of the Curvele...

implantation of intraocular lens with iris-fixation is a safe, efficient and predictable surgical procedure, which empowers the refractive surgeon with singular capabilities. among their advantages are the reversibility, preservation of accommodation and a broad spectrum of ametropic correction. this lens also appears to be a valid option, with a favorable complication rate, for the treatment o...

In order to increase the accurate rates of the iris recognition, this paper proposes iris recognition method based on the combination of second generation curvelet transform and the Support Vector Machine Category correction. The images collected from iris image acquisition system are identified. First, rotation correction of iris and spot removal are carried out for collecting iris images. The...

Iris-based biometric systems identify individuals based on the characteristics of their iris, since they are proven to remain unique for a long time. An iris recognition system includes four phases, the most important of which is preprocessing in which the iris segmentation is performed. The accuracy of an iris biometric system critically depends on the segmentation system. In this paper, an ir...