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Video Watermarking
Zlomek, Martin ; Pelikán, Josef (advisor) ; Doubek, Petr (referee)
Nazev prace: Watermarking videa Autor: Martin Zlomek Katedra (ustav): Kabinet software a vyuky informatiky Vedouci diplomove prace: RNDr. Josef Pelikan e-mail vedouci'ho: josef.pelikan@mff.cuni.cz Abstrakt: Navrzeny a implementovany byly tfi ruzne metody pro watermarking video sekvencf, ktere jsou komprimovany podle standardu H.264. Dve z techto metod reprezentujf metody, ktere watermark vkladaji ve frekvencni oblasti, zati'mco tfeti path' mezi metody, ktere watermark vkladaji do obrazove oblasti. Vkladani watermarku ve frekvencni oblasti probiha zmenou transformacnich koeficientu, ktere jsou ziskany pri'mo z komprimovaneho proudu dat. Watermark, ktery ma byt vlozen v obrazove oblasti, je pred vlozenim do techto koeficientu nejprve transformovan do frekvencnioblasti. Dale byl navrzen a implementovan obecny watermarkovaci system, ktery poskytuje jednoduche rozhrani usnadnujici implementaci konkretnich metod. Odolnost navrzenych metod vuci ruznym utokum byla provefena a vzajemnc porovnana sadou nekolika testu. Testy simuluji nasledujici utoky: rekompresi, zmenu mefitka, ofezani, zbaveni sumu, zasumeni, rozmazani, zaostfeni, mnohonasobne vkladani watermarku a tzv. konspiracni utok. S ohledem na robustnost a viditelnost watermarku v obraze je metoda, ktera watermark vklada do obrazoveoblasti, preferovana pfed...
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Video Watermarking
Zlomek, Martin ; Pelikán, Josef (advisor) ; Doubek, Petr (referee)
Nazev prace: Watermarking videa Autor: Martin Zlomek Katedra (ustav): Kabinet software a vyuky informatiky Vedouci diplomove prace: RNDr. Josef Pelikan e-mail vedouci'ho: josef.pelikan@mff.cuni.cz Abstrakt: Navrzeny a implementovany byly tfi ruzne metody pro watermarking video sekvencf, ktere jsou komprimovany podle standardu H.264. Dve z techto metod reprezentujf metody, ktere watermark vkladaji ve frekvencni oblasti, zati'mco tfeti path' mezi metody, ktere watermark vkladaji do obrazove oblasti. Vkladani watermarku ve frekvencni oblasti probiha zmenou transformacnich koeficientu, ktere jsou ziskany pri'mo z komprimovaneho proudu dat. Watermark, ktery ma byt vlozen v obrazove oblasti, je pred vlozenim do techto koeficientu nejprve transformovan do frekvencnioblasti. Dale byl navrzen a implementovan obecny watermarkovaci system, ktery poskytuje jednoduche rozhrani usnadnujici implementaci konkretnich metod. Odolnost navrzenych metod vuci ruznym utokum byla provefena a vzajemnc porovnana sadou nekolika testu. Testy simuluji nasledujici utoky: rekompresi, zmenu mefitka, ofezani, zbaveni sumu, zasumeni, rozmazani, zaostfeni, mnohonasobne vkladani watermarku a tzv. konspiracni utok. S ohledem na robustnost a viditelnost watermarku v obraze je metoda, ktera watermark vklada do obrazoveoblasti, preferovana pfed...
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Analysis of electric energy market
Holá, Iva ; Brčák, Josef (advisor) ; Doubek, Petr (referee)
This Bachelor thesis deals with market trends and offer of electrical energy. In introduction are mentioned economic systems. Next continues the characteristic of production function. It is further characterized the development and market meaning. Integral parts are clarifying specifics market of electrical energy, liberalization, structure price and distribution rates. The following section express long-term price development and the reasons of their changes. It continues choice of models of offtake. The final part deals to offers individual suppliers and price comparison within selected suppliers.
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The development of unemployment in a selected region
Vichrová, Dagmar ; Brčák, Josef (advisor) ; Doubek, Petr (referee)
The bachelor work addresses the issue of unemployment in Klatovy region. The theoretical part briefly presents the basic terminology used in this work and looks at the legislation which relates to unemployment. It moves on to explain the theoretical causes of unemployment and to define the disadvantaged groups in the labour market. In relation to this, it looks at the official Strategy of Active Employment Policy for 2016. In greater detail, it defines the individual aspects which form the basic methods of coping with unemployment.
The practical part addresses the situation in the labour market in Klatovy region. It starts by presenting the unemployment figures over the period of ten years which allows us to see the development of unemployment from a wider perspective. Furthermore, it presents the current economic data produced in compliance with the official methodology of the Employment Office of the Czech Republic. The latter part focuses on the outcomes of the quantitative survey conducted among entrepreneurs in the region of Klatovy. In conclusion, the practical part formulates proposals for improving the job market situation.
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The development of unemployment in the Pilsen Region
Váňová, Lubomíra ; Brčák, Josef (advisor) ; Doubek, Petr (referee)
The thesis contains a literature review of the concept of unemployment. Explains the concept of the labor market as supply and demand in the labor market, which takes balance, what are the kinds of labor market imperfections and mentions interventions in the labor market. Analyzes in detail the concepts associated with unemployment, and the frequency and duration of unemployment, types and measurement of unemployment, natural rate of unemployment and relations with inflation risk groups unemployment, migration of workers and the causes and consequences of unemployment. Part of the process is to look at the work of the Labor office of the Czech Republic and the related employment policy. The second part contains an analysis of the data obtained at the Labor office of the Czech Republic, Czech Statistical Office and the personal agency ManpowerGroup. In data processing, analysis focused on the attitude of the Pilsen Region to the Czech Republic, the development in the Pilsen Region and individual districts. On analyzing the data follows the evaluation of results, synthesis and assessment of developments in the next period. Forecasts for the future are evaluated favorably.
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Development of unemployment in the selected region
Slavíková, Michaela ; Brčák, Josef (advisor) ; Doubek, Petr (referee)
Thesis deals with the issue of unemployment in the selected region. It is a comprehensive analysis of unemployment in the Central Region, where they selected two districts with different unemployment. The first part of the thesis is focused on the theoretical explanation of the concept of unemployment and related topics. The second part is the development of a comprehensive development of unemployment in Central Bohemia and its individual districts selected indicators. Compared development of the Central Bohemian Region Czech average. There they are also elaborated in detail two districts in the region with the lowest and highest number of unemployed persons (Prague - East and Pribram) from 2008 to 2015. The analysis includes the following characteristics collectively, including their development and structure. The output of the analysis are proposed economic policy measures and an estimate of the future development of unemployment.
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