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Analysis, features and applications of available current mode multipliers
Miksl, Jan ; Jeřábek, Jan (referee) ; Šotner, Roman (advisor)
The diploma thesis deals with analysis, validation, measurement of parameters of the commercially available current multiplies (namely the EL2082 and EL4083) and their applications in practice. Control analysis are carried out in OrCAD PSpice program and compared with values from datasheets. Control analysis are focused on AC and DC characteristics of these active blocks. There are discusses the input impedance, the output impedance, the current gain and the possibility of electronic adjusting. The parameters of the elements were verified by measurements. Proposals for circuit applications (selective circuit, oscillator, frequency filter) with EL2082 and EL4083 are presented and analyzed in the program OrCAD. Three oscillator circuit designs are experimentally tested and the results are compared with the theoretical expectations and simulations in OrCAD. The possibility of electronic control for oscillators is examined. Also the sensitivity and the tolerance analysis are carried out. The constructional details of oscillators are presented at the end of this work.
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Moving Objects Detection in Video Sequences
Hochman, Zdeněk ; Juránek, Roman (referee) ; Španěl, Michal (advisor)
This thesis deals with moving objects detection in video sequences. The principal aim of such detection is to detect and locate motion in the image, separate individual objects, and track these objects. Subsequently, to eliminate shadows, the paper introduces method of motion detection based on Local Binary Patterns together with differential method above the HSV color space. The proposed method provides rapid and accurate movement detection in video sequences.
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Analysis and Data Extraction from a Set of Documents Merged Together
Jarolím, Jordán ; Bartík, Vladimír (referee) ; Kreslíková, Jitka (advisor)
This thesis deals with mining of relevant information from documents and automatic splitting of multiple documents merged together. Moreover, it describes the design and implementation of software for data mining from documents and for automatic splitting of multiple documents. Methods for acquiring textual data from scanned documents, named entity recognition, document clustering, their supportive algorithms and metrics for automatic splitting of documents are described in this thesis. Furthermore, an algorithm of implemented software is explained and tools and techniques used by this software are described. Lastly, the success rate of the implemented software is evaluated. In conclusion, possible extensions and further development of this thesis are discussed at the end.
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Digitization of data for non-conforming pieces (NOK) in the company
Ježek, Jiří ; Zuth, Daniel (referee) ; Maradová, Karla (advisor)
The Masters thesis is focused on the digitalization of data for non-conforming pieces with NOK status made on assembly line. It is mainly about designing a solution that will help to eliminate the nowadays outdated analogue methods. For the choice of digitization, two methods of solution implementation will be proposed in the thesis along with the method of data reporting. These streamlining will consequently lead to not only time but also economic savings for the company. The thesis concludes with recommendations for further development and economic evaluation.
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Statistical Process Control and Reduction of Scrap
Negrová, Stefania ; Blecha, Petr (referee) ; Bednář, Josef (advisor)
The aim of the diploma´s thesis is analysis of the scrap of the chosen process, using the tools of statistical process control and proposal of appropriate containment to reduce the scrap. The thesis describes all seven basic tools of quality and the greatest attention is aimed to Shewart's control charts. One chapter discusses three methods of problem solving in technical practice, while one of the described methods is used in the practical part of the thesis.
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Biomedical image processing in LabVIEW
Mezuláníková, Radka ; Čmiel, Vratislav (referee) ; Harabiš, Vratislav (advisor)
This bachelor thesis deals with the options of using the development environment of LabVIEW in specific processes such as an analyzing and biomedical image data processing. This bachelor thesis sets its goal as projecting and developing a computer program, which could process image data collected from microscopic devices. Image data from computer or external devices could be loaded into the program. It includes such functions as calculation of picture histogram, preprocessing by luminance or geometric transformations, preprocessing by smoothing filtration and edges detection and processing by segmentation. Function of the program was tested by tester images, microscopic images and also by images taken with camera straight into the program.
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Detect the Use of Retouch Filters in a Face Image
Kraváček, Adam ; Drahanský, Martin (referee) ; Goldmann, Tomáš (advisor)
These days, altering images via filters is one of the easiest ways of enhancing its properties. Social networks like Instagram or Snapchat, focused primarily on image sharing, offer their users the option to apply filters on their images, which alter their colours to make them look better. If someone was to extract images from these platforms, many of these images would have a filter applied. This thesis explains the principles of these filters and focuses on detection of filters on facial images. Several approaches to detecting filters are being experimented with. Detection by analysis of histograms and detection by convolutional neural network achieve the best results and so are implemented in a program with a simple user interface. They achieved a success rate of 94,44% (histogram) and 99,10% (CNN). This thesis also investigates the impact of filters on facial recognition, where the impact varies depending on the filter used. Some filters have a significant impact on the rate of successful identifications, whereas others have little impact.In general, however, it can be said that the changes introduced by the application of filters are not negligible.
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Image interpolation
Hejdová, Martina ; Odstrčilík, Jan (referee) ; Kolář, Radim (advisor)
In this thesis, basics, attributes and usage of image interpolation are described. Multiple methods of interpolation are described in detail. Theoretical knowledge of interpolation are practicaly demonstrated in Matlab environment on selected methods of interpolation including my own implementation of quadratic and linear interpolation. Tests were run on different types of images, mostly on biomedicine ones. Single interpolations are also applied on histogram. Results are compered to each other and figure to the graphs.
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