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Online Image Editor
Vodák, Jakub ; Přibyl, Bronislav (referee) ; Svoboda, Pavel (advisor)
The purpose of this thesis is create application for online editation of static image. The main objective is user-friendly interface and simplicity. Basic graphic operations are available. The application allows you to create user accounts and the related ability to manipulate and share images. It is based on Adobe Flash and programming language ActionScript 3.0.
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Multifilter-based Image Viewer
Hanák, Drahomír ; Zavoral, Filip (advisor) ; Kliber, Filip (referee)
The aim of this work is to design and implement a photo viewer program that can save user-defined metadata directly in photo files. That way, metadata will not be lost in case files are renamed or moved. Other goal of this work is to design a query language which can be used to search photos based on both the user defined metadata and existing file metadata. Created program should have a customizable user interface for viewing query results, editing user defined metadata and query editor which has a code-completion (IntelliSense) support. 1
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Numerical Methods of Image Analysis in Astrometry
Honková, Michaela ; Martišek, Dalibor (referee) ; Zemek, František (referee) ; Druckmüller, Miloslav (advisor)
Velmi přesná následná astrometrie je nezbytným předpokladem sledování blízkozemních objektů, které mohou představovat riziko srážky se Zemí. Tato práce přináší ucelený přehled přesné astrometrie, obsahuje potřebnou matematickou teorii, postup předzpracování snímků v astronomii, a nastiňuje použití filtrů. Navrhuje nové metody pro vyrovnání pozadí snímků před provedením astrometrického měření pro případ, kdy nejsou dostupné kalibrační snímky. Tyto metody jsou založeny na vytvoření syntetického flatfieldu pomocí aplikování filtru na snímek a následné užití tohoto flatfieldu pro odstranění pozadí snímku. Metody byly otestovány na vzorových snímcích a vzápětí použity k získání astrometrických pozic prvního mezihvězdného objektu 1I/2017 U1 ('Oumuamua).
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Detection of car approach speed using camera imge processing
Kovář, Jan ; Číka, Petr (referee) ; Šmirg, Ondřej (advisor)
The thesis deals with digital image processing, from the initial acquisition of digital picture frames, subsequent processing segmentation and algorithms to detect visual shapes on the scene. Image processing is a very broad topic, so here are analyzed for more understanding of the fundamental principles of perception and processing of video signals, image representation, his starting shooting through filters governing digital image processing methods to detect the objects in an image. It is also demonstrated by the size dependence of the object in the image on the distance from the camera, whereby we can determine the speed of approaching or moving away from the object. We will show you the specific determination of the distance we need to know the actual result size of the object. This is because the ratio between the size of the object depending on the distance is the same for each object. Finally, this work presents the resulting image frames for implementation using OpenCV library.
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Utilization of sampling filters from the Kresin atmospheric station for further analysis
Vítková, Gabriela ; Kahoun, D. ; Strnadová, G. ; Hanuš, Vlastimil ; Petrov, M. ; Tříska, Jan ; Holoubek, Ivan
The Kresin At Pacov Atmospheric Station serves as a monitoring point for the occurrence and remote transmission of greenhouse gases, selected atmospheric pollutants and basic meteorological characteristics. The determination of the GHG concentration (CO2, CH4, N2O, CO) is carried out in air continuously sampled at 10, 50, 125 and 250 m heights. The analysis itself takes place at the foot of a high mast where the air is drawn through the tubes of Synflex 1300. lines and individual analyzers are protected from mechanical pollution by input filters that are changed at regular intervals as part of the routine maintenance of the device or earlier when unexpected clogging occurs. Analyzing these filters can provide additional information about the surrounding area. These are stainless filters (Swagelog „T“ filter) with a porosity of 40 μm. A sampling head is provided in front of them to protect them from rough dirt and water drops. The volume flow of the scrubbed air is about 15 l / min, the exchange interval is usually 3 months. The need to replace these filters has increased in recent months as the flow rate on the sampling lines has fallen. The question arises as to how long the filters remain fully passable and how well they serve their purpose without burdening the sampling system and lowering the measurement quality. The results of analyzes of polycyclic aromatic hydrocarbons (PAHs) carried out on filters at the Institute of Chemistry and Biochemistry of the Faculty of Science of South Bohemian University as well as images from the Scanning Electron Microscope (SEM) could be helpful in answering this question. On the basis of the preliminary results, we propose a more extensive study for the use of this waste material for the analysis of solid particles from the atmosphere in the surroundings of AS Křešín near Pacov and the optimization of the QA / QC sampling systems of greenhouse gas analyzers.
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Inteligent Video-Player
Sabela, David ; Materna, Zdeněk (referee) ; Kapinus, Michal (advisor)
The aim of this bachelor thesis was to create a user interface for displaying interesting or indifferent way significant events from the views of surveillance camera systems. In the first part of the thesis - Theory - technologies useful for the creation of a web application working with video are described. Principles of graphical quality in user interferences are also summarized in this part, as well as explanation of the principal questions of the surveillance camera systems problematics. In the second and third part - Design and Implementation - my own solution of the prototype of inteligent video player is depicted. The resulting prototype is thereafter subjected to examination by several testers whose results are analysedand evaluated in the final part - Testing.
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Radon daughter products absorption by filters
Šálek, Ondřej ; Jáně, Zdeněk (advisor) ; Matolín, Milan (referee)
The work is engaged in effect of short-lived radon (222 Rn) daughter products on measurement of radon volume activity in soil gas. Solid radon daughter products 214 Po and 218 Po transform by α-decay and influence measurement of radon volume activity in soil gas. This effect was investigated by experimental measurement of radon volume activity in soil gas at the Buk radon reference site in Central Bohemia. At each particular point of radon reference site, three values of radon volume activity were determined by measuring; without filter, with automobile petrol filter and with micro-fibrous filter AFPC type. Experimental measurement demonstrates that both of applied filters have near the same effect on measured values of radon volume activity in soil gas. The difference between radon volume activity values got by measuring without filter and with filters is low, in order of measurement error. Experiment did not evidence necessity of using filter for measuring radon volume activity in soil gas. Radon volume activity measurement error is in order of several kBq.m-3 . This fact brings uncertainty into obtained results. The absence of theoretically possible high content of solid radon daughter products in soil gas samples may be explained by possible adsorption of these particles on sampling and soil...
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Musical Signal Synthesis on Android
Mikulík, Jan ; Glembek, Ondřej (referee) ; Černocký, Jan (advisor)
The main task of this thesis is to design and implement new synthesizer on mobile platform under Android. The synthesizer generates three types of signals - sine, sawtooth and square. Two types of filters can be applied, low pass and high pass, and their cut-off frequency can be controlled. For the sound interpretation, an AudioTrack API was used. The synthesizer is controlled by zones, where one zone equals one tone. Zones can be selected by the user. For this synthesizer, a simple user interface was created.
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Digital controlled dc current source
Miškařík, Vít ; Mišurec, Jiří (referee) ; Vrba, Kamil (advisor)
This bachelor thesis aims to get acquainted with the issue of numerically controlled current sources, individual parts of them, their design options and comparison of the properties of these design options. In this thesis the individual parts needed to construct a numerically controlled DC current sources are analyzed and described, there are their main design relationships and possible achieved accurancy too. In next part there are described selected design options and calculation values of circuit elements. In conclusion there is presented the final schematic of whole source, result of computer function si- mulation, PCB design and measured parameters of really built circuit of numerically controlled current source.
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