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3D Physics Toolbox with Haptics Support
Čermák, Jakub ; Kmoch, Petr (advisor) ; Horáček, Jan (referee)
The main goal of this thesis is to create software which would allow a user to simulate and study physical processes in systems of mass particles, which follow laws of classical mechanics and can collide together. The simplicity and easiness of control was emphasized, which corresponds to support of haptic devices, which can be used both for influencing running simulation and creation of the scene. It is possible to change parameters in physical properties of objects and environment (like gravitation or air density) and also to visualize affecting forces and other properties. It allows the user to explore physical processes. This work uses knowledge from many fields - mass particle mechanics, numerical integration used for application of physical laws, algorithms for effective collision detection and haptic interaction and force rendering.
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Optical bench
Bulant, Martin ; Pelikán, Josef (advisor) ; Horáček, Jan (referee)
The object of this work is to create optical bench simulator. The simulator will display bitmaps using system of lenses and the resulting images will record and then save in bitmaps again. Such program is for users, who want to try how basic optical phenomena work. With aid of the program,it will be possible to simulate phenomena such as: refraction and reflection of light, total reflection of light and light dispersion. Another function is colecting parameters of optical system before the system is actually assembled, for example focal lenght.
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Odstranění rozmazání pomocí dvou snímků s různou délkou expozice
Sabo, Jozef ; Šroubek, Filip (advisor) ; Horáček, Jan (referee)
In the presented work we study the methods of image deblurring using two images of the same scene with different exposure times, focusing on two main approach categories, so called deconvolution and non-deconvolution methods. We present theoretical backgrounds on both categories and evaluate their limitations and advantages. We dedicate one section to compare both method categories on test data (images) for which we our MATLAB implementation of the methods. We also compare the effectiveness of said methods against the results of a selected single-image de-noising algorithm. We do not focus at computational efficiency of algorithms and work with single-channel images only.
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Segmentation and density estimation in femur
Horáček, Jan ; Maršálek, Lukáš (advisor)
Title: Segmentation and Density Estimation in Femur Author: Jan Horáček Department: Department of Software and Computer Science Education Supervisor: Mgr. Lukáš Maršálek Supervisor's e-mail address: lukas.marsalek@mff.cuni.cz Abstract: There are two basic ways of surgical treatment of femoral neck frac- ture - total endoprosthesis or a special metal screw in the bone. In case of a dense enough bone the screws are preferred. But for a too sparse bone, the screw may cut through the femoral head, which results in further surgical operations. We present a novel method for femoral head density measurement, which serves as another hint for the doctor's decision, whether to apply a screw or total endo- prosthesis. Our approach is based on semi-automatical femoral head segmenta- tion from CT dataset based on finding optimal path through polar coordinates on axial slices. The cost function is based on a combination of corticallis proper- ties, mostly the directional behavior of 3D gradients and their size in 2D slices, where they form typical "channels". The final volume is computed using filling and morphological algorithms and its properties are further measured. The final implementation was experimentally validated on RTG clinic of Bulovka hospital and allows radiologists to intuitively and accurately estimate...
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Point-based editor
Remeš, Václav ; Horáček, Jan (referee) ; Pelikán, Josef (advisor)
Goal of this thesis is to implement interactive 3D editor able to work with unorganized point-clouds. Nontraditional graphics primitive needs nontraditional editing tools, author should propose and implement several instruments and verify their behavior in real editing tasks. Particular problems to be solved: efficient data representation and persistence, normal vector computation, dynamic level-of-detail, isotropic point density, etc.
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Lighting workshop
Matějka, Jiří ; Horáček, Jan (referee) ; Pelikán, Josef (advisor)
The object of this work is to design and implement an application for interactive experiments with local illumination models. The user can arbitrarily define an illumination model with mathematical formulas and mark certain parameters to be changeable. While such parameters are changed, the program smoothly draws an updated 3D scene. The scene can be defined in the text format, while several scenes are bundled with the program. Two predefined well-known illumination models are also bundled with the program - Strauss' and Phong's model.
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Segmentace a odhad hustoty ve stehennim kloubu
Horáček, Jan ; Čapek, Martin (referee) ; Maršálek, Lukáš (advisor)
There are two basic ways of surgical treatment of femoral neck fracture - total endoprosthesis or a special metal screw in the bone. In case of a dense enough bone the screws are preferred. But for a too parse bone, the screw may cut through the femoral head, which results in further surgical operations. We present a novel method for femoral head density measurement, which serves as another hint for the doctor's decision, whether to apply a screw or total endoprosthesis. Our approach is based on semi-automatical femoral head segmentation from CT dataset based on finding optimal path through polar coordinates on axial slices. The cost function is based on a combination of corticallis properties, mostly the directional behavior of 3D gradients and their size in 2D slices, where they form typical "channels". The final volume is computed using filling and morphological algorithms and its properties are further measured. The final implementation was experimentally validated on RTG clinic of Bulovka hospital and allows radiologists to intuitively and accurately estimate the femoral head density in approximately 1 to 3 minutes.
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Buccals tablets - literature search
Horáček, Jan ; Mužíková, Jitka (advisor) ; Doležal, Pavel (referee)
BUCCAL TABLETS Jan Horáček ABSTRACT My diploma thesis was aimed at summarising information about phenomena of bioadhesion in connection with administration of drugs. The work describes anatomy and physiology of oral mucosa and differencies in various parts of oral cavity. It refers about advantages and limits of administrating drugs through the oral mucosa. The part called Bioadhesion / mucoadhesion includes definition, theories, influencing factors and description of methods to determinate bioadhesion. Further, it describes and classifies bioadhesive polymers used in technology and also the new generation of polymers which are investigated yet. The last part of work deals with characteristic of buccal mucoadhesive forms in general, describes and compares various buccal dosage forms and shows some examples used in practice, firstly focused on buccal tablets.
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