نتایج جستجو برای: hplc fingerprint

تعداد نتایج: 47176  

2005

Fingerprint identification and verification are one of the most significant and reliable identification methods. It is impossible that two people have the same fingerprint. Automatics identification of humans based on fingerprint requires the input fingerprint to be match with a large number of fingerprints in the database. Generally, the fingerprint recognition systems are unable to solve the ...

1999
Xudong Jiang Wei Yun Yau

The performance of an automatic fingerprint verification approach relies heavily on the quality of the fingerprint image. Enhancement of the fingerprint image is then a crucial step in automatic fingerprint verification. This paper discusses the fingerprint image processing methods for automatic verification and proposes an adaptive oriented low pass filter to enhance the fingerprint image qual...

Journal: :JAMA dermatology 2013
Chew Kek Lee Choong Chor Chang Asmah Johar Othman Puwira Baba Roshidah

OBJECTIVES To determine the prevalence of fingerprint verification failure and to define and quantify the fingerprint changes associated with fingerprint verification failure. DESIGN Case-control study. SETTING Referral public dermatology center. PATIENTS The study included 100 consecutive patients with clinical hand dermatitis involving the palmar distal phalanx of either thumb and 100 a...

2006
Chaohong Wu Sergey Tulyakov Venu Govindaraju

Fingerprint image quality is an important factor in the performance of Automatic Fingerprint Identification Systems(AFIS). It is used to evaluate the system performance, assess enrollment acceptability, and evaluate fingerprint sensors. This paper presents a novel methodology for fingerprint image quality measurement. We propose limited ring-wedge spectral measure to estimate the global fingerp...

Journal: :IEEE Trans. Pattern Anal. Mach. Intell. 1998
Lin Hong Yifei Wan Anil K. Jain

A critical step in automatic fingerprint matching is to automatically and reliably extract minutiae from the input fingerprint images. However, the performance of a minutiae extraction algorithm relies heavily on the quality of the input fingerprint images. In order to ensure that the performance of an automatic fingerprint identification/verification system will be robust with respect to the q...

2017
Balasubramanian Raman Sanjeev Kumar Partha Pratim Roy Debashis Sen

Automatic Fingerprint Identification System (AFIS) uses fingerprint segmentation as its pre-processing step. A fingerprint segmentation step divides the fingerprint image into foreground and background. An AFIS that uses a feature extraction algorithm for person identification will tend to fail if it extracts spurious features from the noisy background area. So fingerprint image segmentation pl...

Journal: :IET Biometrics 2015
Ram P. Krish Julian Fiérrez Daniel Ramos-Castro Javier Ortega-Garcia Josef Bigün

In this study, the authors present a hierarchical algorithm to register a partial fingerprint against a full fingerprint using only the orientation fields. In the first level, they shortlist possible locations for registering the partial fingerprint in the full fingerprint using a normalised correlation measure, taking various rotations into account. As a second level, on those candidate locati...

2013
Ankit Sharma Vinod Kumar Surabhi Jain

Fingerprint recognition is the most effective biometric to provide authentication. Fingerprint images are captured using an optical fingerprint scanner. The fingerprint images are then marked for unique points like bifurcation or ridge termination called minutiae. In this paper, we have surveyed fingerprints of 40 subjects and proposed a new factor in fingerprint image captured from the optical...

2014
Atul S. Chaudhari Girish K. Patnaik Sandip S. Patil

Biometric system is essentially a pattern recognition system which recognizes a person by determining the authenticity of a specific physiological (e.g., fingerprints, face, retina, iris) or behavioral (e.g., gait, signature) characteristic possessed by that person. Among all the presently employed biometric techniques, fingerprint identification systems have received the most attention due to ...

2014
Dongmei Wang Fengyuan He Zhenjiang Lv Dengwu Li

The present study was performed to investigate the variation of phytochemical composition, antioxidant activity and High Performance Liquid Chromatography (HPLC) fingerprinting profiles of three Pyrola species. Thirteen samples (eight P. decorata, three P. calliantha and two P. renifolia) were collected from different regions in China. The tannin, hyperoside and quercetin contents of all sample...

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