National Repository of Grey Literature 11 records found  1 - 10next  jump to record: Search took 0.00 seconds. 
Digital Audio Steganography
Kabelka, Petr ; Malaník, Petr (referee) ; Strnadel, Josef (advisor)
The field of steganography deals with concealing information with the goal of hiding their very existence. The goal of this work is to create a summary of existing digital audio steganography methods and implement some of them. This work presents easily extensible and usable multiplatform library for audio steganography written in the Python programming language and a program that uses it. At the end of this work are the implemented methods compared against each other and against the published methods. Because it is hard to find concrete implementations of various published methods, the presented library enables almost anyone to easily use the implemented steganographic methods and to continue working on research in this field without the need to reimplement all of them.
Finger Position Tracking in 3D Space
Hegr, Miloš ; Šimek, Václav (referee) ; Malaník, Petr (advisor)
The aim of this work is to create a universal system for measuring data describing position in 3D space. This paper provides a theoretical overview of position description in 3D space and shows the possibilities of position reconstruction from sensor data. It gives a closer look at the RingOne hardware device, and finally proposes and implements a system for finger position reconstruction using this device. This system consists of the firmware for the RingOne device, a C language library allowing easy communication with the measuring device and a protocol defining the way data is transmitted and how the measuring device is configured. This work is also complemented by a modified Spacenavd driver for easy presentation of the measured data.
Hybrid Application for Calibration of Camera Lenses
Dovhalenko, Dmytro ; Malaník, Petr (referee) ; Šimek, Václav (advisor)
The goal of this bachelor’s thesis is to design and implement a tool for correction of image distortion caused by the physical curvature of a fisheye camera lens. The theoretical part is concerned with available solutions analysis in order to find an image distortion correction tool that uses modern technologies. The technologies are analyzed and described to find alternative points of view resulting in a way to change software delivery process and deliver a tool in the form of a web application. The thesis takes into account the necessity to deliver a tool that can be developed and deployed in a context of corporate environment. It focuses on the issue of generating settings for hardware-accelerated image correction since it is used more frequently in the real world than its software counterpart. The practical part analyzes various usage scenarios, suitable architecture design as well as user environment design. To achieve this, hybrid web technologies in combination with OpenCV library in the form of a web assembly, as well as other modern tools such as SSO authentication and browser’s built-in storage are used. This thesis will benefit mostly customers in need of modern image distortion calibration solutions. It proves that it is possible to use hybrid web applications to deliver native application alternative that simultaneously increases user comfort. The thesis also provides data important for transformation of native applications into hybrid web applications.
Embedded System for Detecting Human Aggression
Hlavienka, Boris ; Malaník, Petr (referee) ; Strnadel, Josef (advisor)
This bachelor thesis focuses on design and implementation of detection system based on aggresion recognition through combinations of physiological changes such as heart rate, voice intensity and skin resistance. The goal is to implement the system on embedded device and test efficency of such system through an experiment. This paper carries out analysis of individual types and expressions of aggresion, on the basis of which they are then chosen methods of its detection. The final product is then tested using an experiment on a group of voulenteers, who were exposed to various stimuli with the aim of inducing aggressive behavior. The findings may be put to use in the field of aggression prevention and safety protection in various environments as well as medicine.
Probe for Determining the Surface Condition of Small Diameter Barrels
Procházka, Adam ; Goldmann, Tomáš (referee) ; Malaník, Petr (advisor)
This thesis focuses on the analysis of methods for measuring surface profiles, as well as the design and implementation of a device for their measurement. The implemented device utilizes non-contact triangulation profilometry techniques to determine the surface profile by projecting a laser line onto the surface and capturing the projected shape at a non-zero observation angle. It alse collects information about the surface’s image texture under LED illumination. In addition to data on image texture and profile, data on the position of the captured images is also collected using a sensor measuring the device’s distance from the end of the barrel. The work also includes the design and implementation of custom control modules for the chosen LED and laser diode. The output from the device is presented in a user application. The device is designed to function in tubes with diameters from 40 millimeters.
Liveness Detection of Human Hand from Multispectral Images
Lebedeva, Polina ; Malaník, Petr (referee) ; Sakin, Martin (advisor)
This bachelor thesis focuses on the detection of the liveness of a human hand from multispectral images. The main objective is to design and implement an algorithm for recognizing live hands and spoofs based on the analysis of hand images illuminated by specific wavelengths. The work describes various techniques for extracting important features from images, their processing, and methods for determining liveness
Car Movement Measurent on Carrera Racing Tracks
Šíma, Vojtěch ; Malaník, Petr (referee) ; Rydlo, Štěpán (advisor)
The aim of this bachelor thesis is to design a measuring device that allows to measure quantities such as speed, acceleration and centripetal force while the car is moving on the Carrera racetrack. An embedded system will be created for measurement, where the main result is a printed circuit board that was created and mounted according to a schematic design composed of currently available electronic components. As the board moves along the race track, data is then recorded based on the implemented program, which is stored on a memory medium and later processed for a suitable visual presentation. Based on this data, it is then possible to analyse how the model behaves when moving on the autotrack and which factors have an effect on this movement.
Biometric System Security Using Blockchain Technology
Žiška, Marek ; Drahanský, Martin (referee) ; Malaník, Petr (advisor)
 Táto práca analyzuje existujúce protokoly používané na dosiahnutie konsenzu v blockchain technológiách, popisuje koncepty biometrických systémov, identifikuje ich bezpečnostné hrozby, predstavuje existujúce riešenia zabezpečenia biometrických systémov. Na základe týchto zistení navrhuje decentralizovanú verziu biometrického systému, ktorý využíva váhovaný protokol PBFT a blockchain na zlepšenie bezpečnosti ``Feature Extractor'' a ``Matcher'' modulov klasického biometrického systému. Blockchain je charakterizovaný ako systém zaznamenávania informácií, ktorý zaisťuje bezpečnosť, nemennosť a transparentnosť v distribuovanej sieti. Priame využitie blockchainu na zabezpečenie citlivých údajov, akými sú aj biometrické údaje, sa nepredpokladá ako najvhodnejšie využitie, no jeho integrácia v rámci procesov jednotlivých komponentov biometrických systémov sa javí ako dobrá možnosť. Nášmu návrhu sa podarilo zmierniť priame útoky na zabezpečované komponenty a útoky na kanály, ktoré ich spájajú, a na kanál, ktorý spája ``Matcher'' s externou aplikáciou.
Firmware for Testing Platform JaQT
Veverka, Jiří ; Drahanský, Martin (referee) ; Malaník, Petr (advisor)
This bachelor thesis is about the JaQT (Just a Quick Test) platform which was developed for simple and fast software-hardware testing. The theoretical part of this thesis is describing used MCU, control board, peripherals and interfaces. The USB protocol and its CDC ACM class which is used for interfacing the device to enable communication with the board is described in this part as well. In the practical part is described how the JaQT was implemented, debugged, tested, used and evaluated.
Manipulator Control for Acquisition of the Eye Retina
Malaník, Petr ; Dvořák, Michal (referee) ; Drahanský, Martin (advisor)
To use the image of the retina for biometric or medical purposes, it is necessary that the image is of the highest quality and ideally covers the largest possible area. It is therefore necessary to move the sensing device to the most suitable position while ensuring its stability. A laboratory handling platform is used for this purpose. The platform is moved by stepper motors. A control board equipped with a microcontroller has been developed for their control, which allows very fine movements. The theoretical accuracy of the manipulator is up to 20 nm. Since it is necessary for sensing, to have proper retina illumination, the control system also includes adjustable illumination elements in the infrared and visible spectrum. The resulting system allows scanning of the retina of the eye from multiple angles and thereby effectively increase the area on which it is possible to further look for diseases or biometric features.

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