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Watermarking of static images
Bambuch, Petr ; Burda, Karel (referee) ; Číka, Petr (advisor)
The thesis deals with the security of static images. The main aim is to embed the watermark into the original data so effectively, to avoid removal of the watermark with the use of simple and fast attacks methods. With developing of the watermarking techniques the technique of attacks are improved and developed also. The main aim of the attacks is to remove and devalue the hidden watermark in the image. The goal of the thesis is to check current techniques of static image watermarking and implement two methods of watermarking, which are to be tested for robustness against attacks.
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Jiří Wolf Measurement of the properties of ultrasound system
Wolf, Jiří ; Čížek, Martin (referee) ; Kolář, Radim (advisor)
This diploma thesis deals with the displaying process evaluation from the resolution capabilities of the ultra-sonic probe point of view. As a part of the thesis a method for measuring the response from point spread function (PSF) and method for measuring the response from linear spread function LSF were designed. Collected data were processed in the Matlab environment. Basic evaluation parameters of the space resolution capabilities were set and used – axial, lateral and traversal resolution.
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ECG Signal Compression Based on Wavelet Transform
Ondra, Josef ; Hrubeš, Jan (referee) ; Kozumplík, Jiří (advisor)
Signal compression is daily-used tool for memory capacities reduction and for fast data communication. Methods based on wavelet transform seem to be very effective nowadays. Signal decomposition with a suitable bank filters following with coefficients quantization represents one of the available technique. After packing quantized coefficients into one sequence, run length coding together with Huffman coding are implemented. This thesis focuses on compression effectiveness for the different wavelet transform and quantization settings.
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Moving object detection
Škuta, Pavel ; Petyovský, Petr (referee) ; Richter, Miloslav (advisor)
The aim of this these was devise a automatic system applications, monitoring entering of motors vechitles with in automaric collection of trafic data. Automatic system allows identify of mooving vechitlses in slow speed and searching of the area registration number. Theoretical analysis of possible kind solving problems detection moving vechitles and their localization. From possible solutions was selected solution by camera systems. Was take a pictures of vechitles, whitch is as true of the real scene. On the pictures was testing of algorithm for detecting of area registraction number of vechitles. Designed system is possible to use for automatic monitoring mooving entering vechitles.
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Control Design of Brushless DC Motors in Matlab / Simulink or LabView
Svozílek, Marek ; Matyáš, Pavel (referee) ; Karakhalil, Mourad (advisor)
In my work I deal with Model PI and PID controller for BLDC motors. In the beginning, you'll meet the DC motors and their mathematical model. Then I will focus on BLDC motors and their mathematical model. Mathematical models are used for BLDC motors using PI and PID controllers. The construction of these models is used Matlab / Simulink. After programming model followed by comparison, from which it is apparent that it is best to use a PID controller.
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Present-day Programming Method of Microcontroller
Medla, Eduard ; Matyáš, Pavel (referee) ; Zuth, Daniel (advisor)
This bachelor thesis is dedicated to modern methods of programming microcontrollers. In this work are examined some programming languages, various programming environments and graphic editors. In every methods of programming are explained their advantages and disadvantages. Here are two examined methods of loading program to microcontroller, so called flashing. Choosed method is programming language C, which was used to programme two-state regulator with hysteresis in environment AVR Studio 6.2.
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Realization of basic motion of robotic snake
Hadámek, Tomáš ; Šulc, Dalibor (referee) ; Krejsa, Jiří (advisor)
This thesis deals with the realization of robotic snake motion on planar surface. Control electronics had to be developed together with the power source management in order to implement motion control of already available mechanical subsystem of robotic snake. The first part of the thesis is focused on the analysis of existing mechanical subsystem, evaluation of possible solutions and design of control hardware. Second part summarizes particular motions of robotic snake and is further extended by the analysis of existing mathematical descriptions of snake motion, details regarding mathematical model development and implementation and simulation of the motion. The last part is devoted to the realization of robotic snake motion with real hardware. Working physical model of robotic snake represents the key outcome of this thesis. The robot is capable of several types of motion and can be used for further research and development.
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Computer support realization of symbolic models in MATLAB
Valová, Alena ; Věchet, Stanislav (referee) ; Březina, Tomáš (advisor)
The aim of the bachelor's thesis is description of the functions tf (transfer function), ss (state space) and ss2ss (similarity transformation) that occurs in the programming language Matlab in the Control System Toolbox, and their subsequent implementation in the environment of programming language Matlab using the Symbolic Math Toolbox. This thesis is focused to implementation of algorithms that can solve these functions symbolically. By connection and reunification programs, functions can be converted from one form to another. The library is useful for teaching automation.
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Vibration Harvester for Aircraft Applications
Rubeš, Ondřej ; Vetiška, Vojtěch (referee) ; Hadaš, Zdeněk (advisor)
This thesis is focused on modification of a design proposal of a vibration energy harvester for autonomous aircraft applications. Vibration energy harvester is mechanism, which converts vibration energy to electric energy. Its main parts are oscillating mass, magnets and coil for electromagnetics induction. The thesis is consisted of simulations of magnetics circuits, creating 3D model of harvester and simulations of oscillations with parameters from 3D model, magnetics simulations and with input sample of exciting vibrations.
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