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Depth map by using Kinect
Němec, Pavel ; Kaller, Ondřej (referee) ; Boleček, Libor (advisor)
Nowadays, depth maps are widely used in various branches of human activity (in building industry, medicine, mechanical engineering, robotics, show business etc.). The aim of this thesis is to get acquainted with different methods of their acquisition and with possibilities of their enhancement (e.g. reduction of noise and points of not specified depth). The main subject of this research are depth maps acquired by Kinect device.
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Control unit for satellite antenna positioner
Petra-Kajňák, Daniel ; Šotner, Roman (referee) ; Kaller, Ondřej (advisor)
This thesis is focused on the analysis and proposal of the device used for the control of the rotator for the offset antenna controlled by the computer. It explains the principle of the satellite transmitting and aiming the earth-bound antennas. It describes the designs of the individual circuits, printed circuit board and the programming solutions. Device will be the modernization of the existing positioning device.
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Input audio preamplifier used for laboratory measurements
Kučera, Ondřej ; Kaller, Ondřej (referee) ; Kratochvíl, Tomáš (advisor)
This article looks at pre-input low-frequency amplifiers for laboratory work. The task was to study, design and build a fully functional pre-input amplifier for use in low frequency audio technology. In each section, we will discuss the various preamps, which are classified according to signal processing parameters. The construction of each amplifier uses discrete components and operational amplifiers. The second part of the article looks at different measuring devices, such as input sensitivity, transfer characteristics and input impedance etc., which would form part of the amplifier.
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Audio matrix-switch
Dluhý, Vojtěch ; Kaller, Ondřej (referee) ; Šebesta, Jiří (advisor)
Target of this bachelor thesis is make analyse and concept of matrix for switching audio signals with best quality in radio station. Inputs are regulated and outputs are adjusted to line level for connecting with another devices. Matrix is controlled from PC over USB by microcontroller. From this findings is made electrical scheme, PCB a mechanic design of this equipment. Finally, device is constructed.
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Rotational 3D scanner
Švehla, Ľubomír ; Polák, Ladislav (referee) ; Kaller, Ondřej (advisor)
The point of this project is to design and construct a rotational 3D scanner. It is both about the hardware and software part. Low construction price is important factor in the hardware part and therefore the hardware part is really simple. Software part is solved by the FFmpeg tool and programming environment MATLAB. From the selected number of frames from the synchronized video the irradiated part is segmented. Consequently by compositing these traces a 3D model is gained. To gain a better result, the program uses two cameras. Program can be fully controlled from GUI.
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Measurement and Modeling of Wireless Network Coverage
Julínek, Pavel ; Prokopec, Jan (referee) ; Kaller, Ondřej (advisor)
The diploma thesis describes mobile communication systems GSM and UMTS including the operating principle of these systems. It also deals with the GPS issues and the determination of the location by this system. The signal path losses issues between the transmitter and receiver are also described. The focus is also put on Telit UC864-G model and the measurement system, operated by the created programme with the graphic user interface, which measures parameters of the cellular network according to entered input parameters and saves the measured values into the file. The part of the diploma thesis describes another created programme with the graphic user interface displaying the measured network parameters in map data with the possibility to compare the distribution of the measured signal value in both outdoor and indoor environment and the theoretical value set by the propagation models.
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Test form evaluation by OCR
Noghe, Petr ; Fliegel, Karel (referee) ; Kaller, Ondřej (advisor)
This thesis deals with the evaluation forms using optical character recognition. Image processing and methods used for OCR is described in the first part of thesis. In the practical part is created database of sample characters. The chosen method is based on correlation between patterns and recognized characters. The program is designed in a graphical environment MATLAB. Finally, several forms are evaluated and success rate of the proposed program is detected.
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PIN Modulator and Attenuator - laboratory experiments
Kaller, Ondřej ; Jakubová, Ivana (referee) ; Svačina, Jiří (advisor)
Purpose of this bachelor’s thesis is making conception of laboratory work “Amplitude modulator and attenuator with diode PIN“, what was alternative work measure in subject BSES on other sample. For this laboratory work was chosen amplitude modulator of company Hewlett Packard HP - 8732A for its advantage properties, especially easy manipulation with respect to coaxial connection of microwave signal. Work contains partly theoretical summary principles activity of diode PIN, partly it introduce their applications, especially in amplitude modulators directed of reflex reducer. Next there are documented results of single measures servant for ensure check needed properties modulator HP – 8732A. The main part of this work is proposal several points of measure together with introductions for operating devices, proposal form of measure protocol and it’s example. Final point is idea of possibility usage this modulator in power stabilizer.
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Simulation of the DVB-S2 Transmission
Klíma, Jindřich ; Fliegel, Karel (referee) ; Kaller, Ondřej (advisor)
This thesis is focusing on the second satellite digital TV standard, DVB-S2. It deals with the principle of the digital TV and the first standard DVB-S. It also describes the very beginning and characteristics of the DVB-S2, new technologies in use, architecture and the individual topics are then explained more in detail. The thesis also contains the program of transmission simulation of DVB-S2 in MATLAB. In the laboratory of television technology UREL, two standards were measured and compared with the values obtained from the program. The functionality of the program and the benefits of DVB-S2 were verified afterwards.
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