National Repository of Grey Literature 81 records found  beginprevious62 - 71next  jump to record: Search took 0.01 seconds. 
Numerical characteristics of digital image quality
Ivičič, Vojtěch ; Martišek, Dalibor (referee) ; Druckmüller, Miloslav (advisor)
This thesis deals with quality of digital images and with methods for measurement their numerical characteristics. Our attention is drawn to measurement of sharpness, as a main factor of image quality, in both space and spectral domain. For this reason, the Fourier and the discrete Fourier transform is described in one and two dimensions. Methods, presented in this work and implemented on attached CD, can be used for automatic image quality classification and autofocus of optical systems.
Normalization of hyperspectral image data
Grísa, Tomáš ; Druckmüller, Miloslav (referee) ; Martišek, Dalibor (advisor)
The airborne hyperspectral remote sensing is used as an approach to monitor and analyse actual state of environmental components. This thesis deals with hyperspectral image data, especially it is focused on normalization with respect to scanning angle. The thesis proposes specific algorithm, which is based on the statistical analysis of spectral lines across the scan line and on a physical models describing the process of spectral reflectance. An important part of this thesis is software implementation of proposed algorithm, that allows to calculate required normalization for real datasets.
Mathematical methods of morphology modelling of coniferous trees
Janoutová, Růžena ; Štarha, Pavel (referee) ; Martišek, Dalibor (advisor)
The thesis was focused on creation of a coniferous tree by nondestructive method allowing description of structure of adult spruce trees. After processing provided data we created a model of L-system which creates a tree branch. Thereafter, a Python script generated parameters which were required for the creation of the model of the tree in graphical software Blender. Model of coniferous tree was sucesfully generated. Its memory requirements are high but for our purposes this is not an essential problem.
Gaussian filters with rotating kernel
Vintr, Tomáš ; Martišek, Dalibor (referee) ; Druckmüller, Miloslav (advisor)
The objective of this thesis is to create Gaussian 1D filters with rotating kernel theory which enables to program algorithm for noise reduction and beam structure highlighting in a digital picture of the solar corona. A fragment of original picture of solar corona and of pictures filtred by this algorithm is in the enclosure.
Phase-correlation based image registration
Druckmüllerová, Hana ; Martišek, Dalibor (referee) ; Procházková, Jana (advisor)
Tato práce se zabývá použitím fázové korelace k určení vzájemné rotace, změny měřítka a posunu mezi digitálními obrazy. Fázová korelace je založena na Fourierově transformaci, proto je popsána Fourierova transformace funkcí definovaných na R^2 i diskrétní Fourierova transformace funkcí definovaných na konečném počtu bodů {0, 1, ... , N-1}^2, kde N je přirozené číslo. Dále je pozornost věnována modifikacím fázové korelace, díky nimž metoda umožňuje nalezení parametrů podobnostní transformace i mezi obrazy, které mají vysoký dynamický rozsah a slabě patrné struktury, obsahují aditivní nebo impulzní šum a jsou pořízeny pomocí různých snímačů a optických soustav. Obsahem práce jsou i modifikace metody pro snímky sluneční koróny pořízené během úplných zatmění Slunce, což patří mezi nejobtížnější úlohy registrace obrazů.
Gaussian filters with rotating kernel
Vintr, Tomáš ; Martišek, Dalibor (referee) ; Druckmüller, Miloslav (advisor)
The objective of this thesis is to create Gaussian 1D filters with rotating kernel theory which enables to program algorithm for noise reduction and beam structure highlighting in a digital picture of the solar corona.
Modelling of NURBS curves and surfaces in the projective space
Ondroušková, Jana ; Štarha, Pavel (referee) ; Martišek, Dalibor (advisor)
In the first part I discuss ancestors of NURBS curves and surfaces, rather Ferguson, Beziere, Coons and B-spline curves and surfaces and furthermore B-spline functions. In the second part I devote to NURBS curves and surfaces, their description as a linear combination of B-spline functions in the projective space. I specify conical arcs more detailed, their submit in the projective space and NURBS surfasec given as tensor product of NURBS curves. Last part is devote to describtion programs for modeling conicals and NURBS surface.
Multispectral Analyse of Image Data
Novotný, Jan ; Druckmüller, Miloslav (referee) ; Martišek, Dalibor (advisor)
The airborne hyperspectral remote sensing is used as an approach to monitor actual state of environmental components. This thesis covers priority treatment to analyse of hyperspectral data with the aim of a tree crowns delineation. Specific algorithm applying adaptive equalization and the Voronoi diagrams is designed to subdivide a forest area into individual trees. A computer program executes the algorithm and allows testing it on real data, checking and analyzing the results.
Multivalued logic systems for technical applications
Turek, Vojtěch ; Druckmüller, Miloslav (referee) ; Martišek, Dalibor (advisor)
Velmi často je vyžadováno, aby automatizovaná zařízení byla jistým způsobem "inteligentní", tedy aby jejich řídicí systémy uměly emulovat rozhodovací proces. Tato diplomová práce poskytuje obecný formální popis vícehodnotových logických systémů schopných zmíněné emulace a jejich souvislost s teorií fuzzy množin. Jsou uvedeny způsoby vytváření matematických modelů založených na lingvistických datech. Dále se práce zabývá znalostními bázemi a jejich vlastnostmi. Součástí této práce je také počítačový program sloužící k tvorbě slovních modelů.

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