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Active noise cancellation
Bulva, Ondřej ; Sekora, Jiří (referee) ; Balogh, Jaroslav (advisor)
This project deals with problems of active noise cancellation. The first part focuses on the understanding of the anatomy and physiology of the human hearing. Furthermore, the understanding of the basic principles of acoustics, distribution of sound, and his generating. The important part is introduction to the issue of noise in the environment. The second part is dedicated to device design. The aim of this work was to design and construct device for active noise cancellation. Designed and assembled were two versions of the device for active noise cancellation. The problems associated with achieving the perfect noise cancellation is analyzed at the end of the work in detail together with the results of active noise canceling each version of the device.
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Image recognition for robotic hand
Labudová, Kristýna ; Jakubíček, Roman (referee) ; Harabiš, Vratislav (advisor)
This thesis concerns with processing of embedded terminals’ images and their classification. There is problematics of moire noise reduction thought filtration in frequency domain and the image normalization for further processing analyzed. Keypoints detectors and descriptors are used for image classification. Detectors FAST and Harris corner detector and descriptors SURF, BRIEF and BRISK are emphasized as well as their evaluation in terms of potential contribution to this work.
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Radiography image preprocessing tools
Chmelař, Petr ; Richter, Miloslav (referee) ; Petyovský, Petr (advisor)
This thesis deals with design and realization of methods of preprocessing of X-ray images and its storage. In the first part of this thesis, there were designed and implemented methods for preprocessing of series of X-ray images such as averaging after image registration or merging of images to a HDR image using Debevec method. In the following part of the thesis, there was done a literary research of data formats based on which was implemented a library for x-ray images storage. Both implemented methods allow to reduce a random noise by merging a series of images. Application of the Debevec method also allow to increase a dynamic range of image.
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Automatic Generating of Subtitles by Speech Recognizer
Csintalan, György ; Plchot, Oldřich (referee) ; Schwarz, Petr (advisor)
This bachelor thesis describes developing an application for automatic generation of subtitles for films using BSAPI (Brno Speech Application Interface). At first the reader is guided to the problematics of this task and the aim of this work is described. In the next section the speech recognition API (BSAPI) is described from a theoretical point of wiev. After this, the next section is about extracting voice channel from video. The next chapter describes the implementation of the application. Further, experiments in different situations are described and possible improvements are discussed in order to achieve better outputs, for example speech enhancement by Wiener filter. In the conclusion are discussed achieved results and experiments.
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Processing of temperature data for inverse heat conduction tasks
Brachna, Róbert ; Komínek, Jan (referee) ; Luks, Tomáš (advisor)
This bachelor's thesis deals with digital filters and noise removal from temperature measurements. The basic concept for the proper understanding of properties of filters is the discrete Fourier transform, which is illustrated on a given example. Next, the thesis considers linear filters and the design of basic types for noise reduction. An adaptive filter is designed by analyzing experimental data. This filter is subjected to further analysis using a simulated cooling process disrupted with artificially added noise and will be compared to other conventional filters. One criterion is to compare the curve of the filtered temperature to the simulated one. The second criterion is the reconstructed boundary condition, which is the output of the inverse heat conduction task.
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Airconditioning of the house
Milatová, Adriána ; Blasinski, Petr (referee) ; Rubina, Aleš (advisor)
The bachelor's thesis deals with the design of airconditioning devices in specific sections of the house with the swimming pool. The individual devices are designed to meet the hygienic, operational and functional requirements as demanded by the indoor microclimate of the premises. The device number 1 ensures the indoor air circulation. Coverage of heat rise in summer is ensured by the multi – split system. The device number 2 ensures moisture remove and coverage of heat loss in winter. The theoretical part of the thesis focuses on the moisture microclimate of buildings. The practical part comprises the specific proposal of two airconditioning devices for hot-air ventilation and heating of the house. The result of the thesis is the project dokumentation of two airconditioning devices of the object.
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Wavelet Transform in Image Processing
Dostál, Martin ; Klíma, Ondřej (referee) ; Bařina, David (advisor)
The wavelet transform has been used for several decades and it is still an object of research - especially its recent modifications which are using the so-called second generation wavelets. It has several advantages over other integral transformations. The most important of them are the ability to localize both in time and frequency and an ability to decorrelate some real non-stationary signals such as images. For this reasons, the wavelet transform became an often used tool in many image processing tasks, for example in image compression, edge detection or contrast enhancement. In this thesis, the wavelet transform is explained, including the theoretical foundation and implementation for use with two-dimensional discrete signals. Some of the applications of the wavelet transform are presented and described. The wavelet transform showed to be suitable tool for edge detection, noise reduction, contrast enhancement and HDR compression.
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