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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Liveness Detection on Fingers Using Vein Pattern / Liveness Detection on Fingers Using Vein Pattern

Dohnálek, Tomáš January 2015 (has links)
Tato práce se zabývá rozšířením snímače otisků prstů Touchless Biometric Systems 3D-Enroll o jednotku detekce živosti prstu na základě žil. Bylo navrhnuto a zkonstruováno hardwarové řešení s využitím infračervených diod. Navržené softwarové řešení pracuje ve dvou různých režimech: detekce živosti na základě texturních příznaků a verifikace uživatelů na základě porovnávání žilních vzorů. Datový soubor obsahující přes 1100 snímků jak živých prstů tak jejich falsifikátů vznikl jako součást této práce a výkonnost obou zmíněných režimů byla vyhodnocena na tomto datovém souboru. Na závěr byly navrhnuty materiály vhodné k výrobě falsifikátů otisků prstů umožňující oklamání detekce živosti pomocí žilních vzorů.
12

Jádro multimodálního biometrického systému / Core of the Multimodal Biometric System

Pokorný, Karel January 2012 (has links)
The aim of this thesis is a design and realization of the core of multimodal biometric system. First part of the thesis sumarizes contemporary knowledge about biometric systems and about combination of their outputs. Second part introduces concept and implementation of multimodal biometric system, which uses weighted score combination and user-specific weights.
13

Podpora pro autentizaci pomocí otisků prstu / Support for Fingerprint Authentication

Bartoň, Jaroslav January 2009 (has links)
The goal of the thesis is the finger-print authentication support within the Linux operating system and the K Desktop Environment (KDE). Theoretical part of the thesis firstly explains main IT security terms and ways to proof the identity. Secondly it describes biometric systems and types of processed biometric characteristics. Lastly the features of finger-prints, their markants as well as types of scanners used in scanning the finger-prints and ways to analyze the scanned material have been elaborated. Practical solution part of the thesis develops and establishes finger-print management application and plugin for KDM graphics login manager.
14

ANALÝZA VÝVOJE OSÍDLENÍ A KRAJINNÉHO POKRYVU V PROSTŘEDÍ GIS NA PŘÍKLADU OBCE NOVÉ HUTĚ NA VIMPERSKU / ANALYSIS DEVELOPMENT OF SETTLEMENT AND LAND COVER IN ENVIRONMENT OF GIS ON EXAMPLE VILLAGE NOVE HUTE ON VIMPERSKO

BLAŽEK, Vojtěch January 2011 (has links)
Imaging in 3D is today very modern trend map outputs no excepting. Inside of following work is prooved range of possibilities of programme ArcScene that the serves above all to generating 3D models. These models are create on the basis adjustment map basis, imperial prints stationary land register and historical ortofoto. These adjustment including procedure are described at methodical part. On the basis of 3D models is effected analysis of land cover and settlement. Thesis paies of municipal territory Nové Hutě that the fall in Šumava microregion Vimpersko.
15

Detekce šířky papilární linie u otisku prstu / Detection of Papillary Line Width by Fingerprints

Homola, Antonín January 2011 (has links)
This work outlines a method of detection of the papillary line width in fingerprints. This method is one of the possible methods of liveness detection. The first part of the work with deals defining of the fingerprint, attacks on today's systems and possibilities to improve security. The next section detection describes of the papillary line width. During the process of resolving, the first thing to do was to start operation of the scanning device and to read the database for tests and experiments. An independent application was created on this purpose. Further, there were projected methods for detection and measuring of the papillary line width. Use of the Canny edge detector with the Sobel operator and the Gaussian filter proved the best. Then, there is described implementation of individual methods. The next part of the work describes and assesses the results of the tests. The last chapter summarizes the work and proposes further possibilities of development.

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