National Repository of Grey Literature 198 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Connection of algorithms for removal of influence of skin diseases on the process for fingerprint recognition
Heidari, Mona ; Derawi, Mohammad (referee) ; Gomez-Barrero, Marta (referee) ; Drahanský, Martin (advisor)
Tato práce se zaměřuje na datové struktury, zpracování obrazu a metody počítačového vidění pro detekci a rozpoznávání nemocí ve snímcích otisků prstů. Počet vyvinutých biometrických systémů a dokonce i používaných biometrických charakteristik se zvyšuje. Všeobecně platí, že otisk prstu jednotlivce je jedinečný a zůstává relativně neměnný po celý život. Struktura papilárních linií se však může měnit nemocemi a může být poškozena kožními chorobami. Vzhledem k tomu, že jsou systémy do značné míry závislé na struktuře papilárních linií jednotlivce, která pozitivně ovlivňuje jejich identitu, lidé trpící kožními nemocemi mohou být diskriminováni, protože jejich papilární linie mohou být narušeny. Vliv kožních onemocnění je důležitým, ale často opomíjeným faktorem v biometrických systémech založených na otiscích prstů. Jedinec trpící kožním onemocněním, které postihuje konečky prstů nemusí být schopen používat určité biometrické systémy. Shromáždění databáze otisků prstů, ovlivněných kožními nemocemi, je náročný úkol. Je nákladný a časově náročný, vyžaduje také pomoc lékařských odborníků a ochotné účastníky trpící různými kožními nemocemi na bříšcíeh prstů. Surová databáze otisků prstů s onemocnénímí byla nejprve analyzována, aby poskytla pevný základ pro budoucí výzkum. Pro každé konkrétní onemocnění jsou nalezeny společné znaky mezi všemi snímky otisků prstů postižených nemocí a je definován obecný popis každého onemocnění a jeho vlivů. Poté automaticky přiřadíme označení na základě kombinace známého stavu obrazu otisku prstu. Navrhované řešení je integrováno s různými algoritmy zaměřenými na knihovny pro zpracování obrazu a metody počítačového vidění pro detekci objektů. Je vyhodnoceno na poškozených souborech dat otisků prstů a popisuje současný stav implementace pomocí navržených technik. Současný stav techniky pro implementaci detekce onemocnění využívá analýzu textury a detekci prvků porovnáváním hodnot intenzity pixelů v malém okolí v obraze. Vzhledem ke složitosti jednotlivých vzorů nemocí vede kombinace algoritmů analýzy textury k lepším výsledkům detekce. Kombinace Gray Level Co-occurrence Matrix (GLCM), Local Binary Pattern (LBP), pole orientací a matematické morfologie může detekovat poškození v obrazech otisků prstů. Kombinace těchto funkcí umožňuje identifikovat změny v textuře a tvaru toku papilárních linií otisků prstů způsobené nemocemi. Tyto techniky zachycují různé aspekty textury a tvaru poškození v obrazech otisků prstů a vedou k identifikaci změn v textuře způsobených nemocemi. V průběhu detekčního procesu jsou použity matematické morfologické operace pro zlepšení strukturálních detailů tím, že odstraňují malé nesrovnalosti v obraze a zjednodušují tvar objektů, což usnadňuje jejich identifikaci a izolaci, rozšiřováním hranic objektů v obraze nebo vyplněním mezer a propojením rozlomených částí objektů. To vede k lepší detekci a rozpoznání objektů.Na konci procesu detekce je použita koherence, která ukazuje hodnocení kvality polí obrazu otisku prstu na tři typy: zdravý, poškozený a pozadí.
Localization system for mobile robot B2
Korytár, Lukáš ; Věchet, Stanislav (referee) ; Krejsa, Jiří (advisor)
The master’s thesis implements localization and navigation routines for mobile robot B2 in order to operate autonomously in an environment described by a road map only. The ROS framework was used for developing new software. The research part describes possible approaches to localization problem and summarizes ROS packages with localization and navigation software. The following part includes communication with the robot’s sensor modules and data processing from LIDAR, IMU and camera. The localization package robot_localization based on Kalman filter is implemented and setting of the navigation stack navigation is proposed, aiming to robot’s autonomous outdoor navigation. Implemented functions were tested in park environment and they are evaluated in this master's thesis too.
Spectral Analysis of EEG Signal
Miklenda, Petr ; Orság, Filip (referee) ; Kupková, Karolína (advisor)
This bachelor thesis is focused at the EEG signal analysis using the Fast Fourier Transform. The theoretical part consist of EEG signal description, its creation and selected method for signal analysis. The practical part presents program for recording data from EEG headset and displaying the Fourier spectrum.
Musical multi effects analysis
Masár, Igor ; Kubásek, Radek (referee) ; Friedl, Martin (advisor)
This work deals with guitar effect and guitar sound in general. Most widely used effects are described as well as their output time courses are simulated. There is a comparison of analog and digital effects. There is also explained the principal of guitar multiefects, described all parts of guitar efect chain and determined key parameters, which has the main impact on quality of final sound. It is used to describe a methodology for measuring multi-effects and the results obtained by this measurement. The last part deals with psychoacoustic measurements.
Use of Mobile Device Sensors in a Car
Aron, Lukáš ; Široký, Vít (referee) ; Žák, Pavel (advisor)
This thesis analyses the use of an accelerometer commonly present in a mobile device for the measuring of vibration in a vehicle. Such measurements are used to map the quality of the road surface. The signal from the accelerometer and the current travelling speed of the vehicle are evaluated according to a threshold function. This function allows for a determination of whether the signal reported by the device signifies a pot-hole or another type of defect on the road surface. If the defect is determined to pose a threat to a vehicle travelling at higher speeds, then this fact is saved into the memory of the device. The second part of this thesis deals with the design of an internet and a mobile application, which is able to collect all measured data processes using cluster analysis and then shares the results with other participating devices. Tha practical results is that a map of road surface defect is thus created, which is then displayed to road users. This thesis deals with theory of mobile device sensors, including signal processing, as well as the design creation of the internet and mobile application.
Control of low-cost prosthetic limb using EMG sensors
Šafran, Jindřich ; Brablc, Martin (referee) ; Rajchl, Matej (advisor)
This Bachelor thesis is about the general design, construction and model assembling of the prosthetic arm. Its programming and controlling of the robotic part are also included. The thesis is divided into five chapters. In the first chapter, the anatomy of forearm is analysed and described. Its anatomical structure is the theoretical base on which the final model is designed and constructed. Following, second chapter, comprises the analysis of prosthetic mechanisms according to the historical development up until today. And this chapter also contains the production of the designed forearm-hand-model itself. The third chapter describes the EMG diagnostic method and the process of manufacturing of each compartment of controller device used for controlling the mechanism of the designed model. Next, chapter number four contains gaining and processing of the data from testing of the measuring device. In the last fifth chapter, the programming of the made forearm-hand-model in various development environments is described. All the results and gained knowledge, are evaluated and described in the conclusion of the Bachelor thesis.
Realization of electronic laboratory model for practical education of signal processing and identification methods
Gamba, Jaromír ; Bastl, Michal (referee) ; Brablc, Martin (advisor)
This thesis deals with design of electronic laboratory model for teaching mechatronic subjects. The main part of the model consists of a RLC-circuit embedded in PCB. Other parts of PCB and data acquisition card mediate communication with Matlab environment. In the thesis the progress of design process, simulation, manufacture and model testing is described. The results are functioning educational model and several educational tasks, for which the solution are presented.
Sensors signal processing methods of the autonomous vehicle
Kostiha, Petr ; Vopařil, Jan (referee) ; Kučera, Pavel (advisor)
This bachelor thesis deals with autonomous vehicles and ways of perception their surrounding environment. The thesis contains description of the sensors, which autonomous car uses to draw the surroundings. Furthermore, the thesis is focused on working of the sensors and primarily on signal processing methods which sensors generates.
Audio Interface for Signal Procesor Using IEEE 1394 Bus
Staroň, Martin ; Přinosil, Jiří (referee) ; Schimmel, Jiří (advisor)
The scope of bachelor’s thesis is a design of the connection between the Freescale digital signal processor DSP56300 family and the DFM Audio DICE II iKit interface by way of the TDM bus. The DICE II iKit interface uses serial IEEE1394 FireWire bus that transmits an audio stream from a host computer. This signal receives the DICE II iKit interface that converts audio data from IEEE1394 FireWire to the TDM bus. The signal processor that process the sended audio data in a real time is connected to this TDM bus. The theoretical part of this work describes the theory of the digital signal processor, in detail DSP56300 Freescale family. After that there is a basic specification of the IEEE1394 FireWire bus. The theoretical part of this bachelor‘s thesis is ended by a description the TDM bus, the I2S interface and the AudifiedDSP Solution system. A connection of the signal processor and the DICE II interface was solved in the practical part, included the debbuging and the operating of the hadle subroutine for the duplex communication. The results of this thesis is might utilise for the duplex communication between the signal processor and aplication software working on the host computer.
Radar-Based Speed Measurement for Sport Events
Radoš, Daniel ; Polok, Lukáš (referee) ; Maršík, Lukáš (advisor)
The Bachelor thesis is dedicated to speed measurement focused on sport events. In introduction of this thesis, basic principles of radar and their dividing are mentioned. Following part of thesis is dedicated to continuous wave radar, using Doppler effect and also principle of sequential signal processing, followed by resultant speed calculation of measured object. Ultimately, selected methods are implemented and tested using real data. In the end, the implemented application is evaluated and the possible continuation of this work is stated.

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