نتایج جستجو برای: iris taxa

تعداد نتایج: 42679  

2008
Guangzhu Xu Zaifeng Zhang Yide Ma

Iris recognition has received increasing attentions due to its distinct characteristics in recent years. An efficient approach for iris feature extraction plays a very important role in an iris recognition system. In this paper, we developed a novel method for iris feature extraction utilizing the Intersecting Cortical Model (ICM) network which is a simplified model of Pulse-Coupled Neural Netw...

2009
Yung-hui Li Marios Savvides

Iris masks are essential in iris recognition. The purpose of having a good iris mask is to indicate which part of iris texture map is useful and which part is occluded or contains noisy artifacts such as eyelashes, eyelids and specular re ections. The accuracy of the iris mask is extremely important. The performance of the iris recognition system will decrease dramatically when iris mask is ina...

2013
Osama Ouda

The fuzzy commitment scheme is one of most popular biometric cryptosystems that aim at securing cryptographic keys using biometrics. Because of the high recognition accuracy exhibited by the iris, iris-based fuzzy commitment schemes, among other modalities, provide the most practical performance rates. Unfortunately, existing iris-based fuzzy commitment schemes do not incorporate noise masks, g...

2013
Hassan Hashemi Sasan Moghimi

Purpose: To demonstrate an approach to the problems of cataract surgery in extensive iridoschisis Methods: Four eyes of 2 patients with extensive iridoschisis had cataract surgery by the same surgeon using the techniques that resembled techniques for phacoemulsification in intraoperative floppy iris syndrome (IFIS). We used low flow parameters on phacoemulsification, used super-cohesive ophthal...

Journal: :Fungal biology 2013
Christiane Baschien Clement Kin-Ming Tsui Vladislav Gulis Ulrich Szewzyk Ludmila Marvanová

Aquatic hyphomycetes play a key role in decomposition of submerged organic matter and stream ecosystem functioning. We examined the phylogenetic relationships among various genera of aquatic hyphomycetes belonging to the Leotiomycetes (Ascomycota) using sequences of internal transcribed spacer (ITS) and large subunit (LSU) regions of rDNA generated from 42 pure cultures including 19 ex-types. T...

Journal: :Asian Journal of Ophthalmology 1970

Journal: :Archives of Ophthalmology 2000

2012
Qichuan Tian Hua Qu Lanfang Zhang Ruishan Zong

Personal identification based on biometrics technology is a trend in the future. Traditional approaches, for example, keys, ID cards, username and password, are neither satisfactory nor reliable enough in many security fields, biometrics authorizations based on face, iris, fingerprint have become a hot research filed. In those methods, iris recognition is regarded as a high accuracy verificatio...

2012
Pankaj Agarkar

The Iris recognition has become as one of the promising biometrics feature in human identification system. In addition to conventional IRIS capture challenges, IRIS code searching and similarity matching of IRIS code has also become a challenging task in IRIS code VLOB (Very Large Object database). Hamming Distance (HD), a sequential similarity matching technique, proves in-efficient for VLOB I...

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...

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