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Terrain modelling and walk-through
Křižka, Radek ; Pelikán, Josef (advisor) ; Krajíček, Václav (referee)
My thesis deals with terrain modelling and scene displaying. The main subject of modelling is the terrain as well as objects, that can be found on it. Terrain data may be random so hey cannot include information about the position of each object (e.g. a tree or abush). This is the aim of our modelling; given the entry data, we must be able to generate objects at positions that would be as close to reality as possible. The last, but certainly not least part of the project is displaying the model-scene with the possibility of a walk-through. We will be introduced to various object types, possibilities of displaying optimization and we'll explore the "Level of detail" techniques. The result is an application displaying the described techniques on an example scene with a few types of brushwood including the possibity of an interactive walk-through.
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Meteorite detection system for widefield CCDs
Gomboš, Igor ; Pelikán, Josef (advisor) ; Krajíček, Václav (referee)
Lúthien is a software package designated to process astrographic images created by BOOTES, a Czech-Spanish robotic telescope system. As an extension to the RTS2 library, its purpose is to process large-sized astrographic images taken by a wide eld camera. Due to high storage cost, it is necessary to treat the input data in real time (20 to 30 seconds being the maximum). Apart from that, the software is open and easily extensible. The proposed solution offers three detection methods to choose from. The first one implements the Standard Hough transform. The other two are based on the Canny edge detector and simple region growing, respectively.
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Implementace algoritmů pro zpracovaní obrazu na IBM Cell
Klecanda, Václav ; Krajíček, Václav (advisor) ; Skrbek, Miroslav (referee)
This work summarize available information about IBM Cell/B.E. architecture to let the reader create a necessary overview for programming for this architecture. Practical information are based on development of an application that implements nontrivial image processing algorithm, sparse field level set segmentation. Next section contains description of the application development and associated problems solving. The work compares common and Cell B.E. architectures and describes conditions necessary for creation of an effective Cell/B.E. application. The work also contains brief procedure of the most important development tools installation. This procedure has to prepare everything necessary as fast as possible and thus to shorten the duration of the preparation phase to let the reader to start development.
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Third-person flight action game with map generator
Nevolová, Kateřina ; Balyo, Tomáš (advisor) ; Krajíček, Václav (referee)
The goal of this thesis was to design and create a third-person flight action game in 3D. The theoretical part of this work includes analysis of the action game environment, the concept of the physical model for the use in movement and orientation in 3D, discussion about artificial intelligence used in this genre and specification of own map format. This work also includes the implementation of such game with a compatible map generator.
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Curve Representations for Morphometrics
Zámečník, Tomáš ; Pelikán, Josef (advisor) ; Krajíček, Václav (referee)
This paper deals with analysis, research and implementation of various methods of curve representation in anthropology and methods for such curves detection in digital photography. Used methods appertain to computer image processing and analysis. Fundamental part of this work is software project - curve editor, included in Morphome3cs framework, which was developed by same-named team on Faculty of Mathematics and Physics on Charles University in Prague. As a motivation for this work, and simultaneously as a first application, served analysis of sexual dimorphism of the greater sciatic notch and replacement of contemporary used manual methods. Faculty of Science on Charles University in Prague deals with such sexual dimorphism research and this project is developed for it.
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Web-camera based interactive user input
Šedivý, Miroslav ; Pelikán, Josef (advisor) ; Krajíček, Václav (referee)
The goal of this thesis is to design and implement an interactive user input device for a PC, consisting of a web-camera scanning the gestures of the user's hand. The user will be wearing a special glove fixed with colored LED diodes to aid the image analysis process. Thesis concentrates on possible approaches to real-time image processing and interactive recognition of gestures. The ultimate goal is to substitute the basic functionality of the "computer mouse".
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Interactive deformation of volume data
Talaš, Josef ; Krajíček, Václav (advisor) ; Kmoch, Petr (referee)
This thesis describes an implementation of 3D Chainmail Algorithm for volume data deformation. This algorithm is chosen after a comparison of several approaches to volume data deformation. This is not an algorithm suitable for physically plausible deformations, it is a compromise between performance, plausibility and simplicity. In another part of this thesis the algorithm is closely described. There is also analysed the possibility of algorithm parallelization using advanced Microsoft Parallel Extensions library. A part of this thesis is devoted to VL framework, which is in our program used to display volume data. The final program is tested on both real and artificial data. The target platform is Microsoft Windows operating system.
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Triangle mesh compression
Harasim, Jiří ; Pelikán, Josef (advisor) ; Krajíček, Václav (referee)
This bachalor work is focused on a compression of triangle mesh problematics. It is started with analysis and trying to find a suitable solution for the Morphome3cs project. This paper is connected to the program I created as an Individual Project and Software Praxis. The program is able to compress and decompress a triangle mesh in the Morphome3cs project. There are analysed some problems and discussed a few ways to solve the problems that have arisen throughout the work. I describe implemented algorithms and present a user's and technical documentations at this paper. I close up with the possible future work, based on this solution.
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Data extraction from document scans
Macháč, Bohuslav ; Kolomazník, Jan (advisor) ; Krajíček, Václav (referee)
In this work I developed an application capable of extracting data from scanned documents. For optical character recognition, I used external OCR engine Tesseract, but it can be easily changed. I use document templates, which have informations about data areas and its data types. I tried to automatize most of the steps which are required to extract data or create new data template. User can improve or change results of these steps. For export from application I implemented components, which export data to XML, HTML or plain text. Another components can be easily added, to adapt application for various uses.
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Volume measurement in 3D data
Krajíček, Václav
Medical diagnostics using computed tomography or magnetic resonance is a common part of complex medical checkup for a long time. These devices produce vast volumes of data, which must be analyzed by an expert physician. There is a big space for utilising computers to aid medical diagnosis, or visualization. This work aims to measure volume of a specific organ in the human body, like kidneys or spleen. To measure volume of the organ it is necessary to reconstruct the object from three-dimensional data. Reconstruction is based on segmentation of the image data, which separates reconstructed organs from the background. The task of segmentation is specially adapted to this kind of data, which are, from specimen to specimen, characterized by big similarity in common shape, but also by big heterogeneity in tiny details. Deformable models were chosen as a primary tool for the segmentation of three-dimensional volumes. They are also the main topic of this work. Programs measuring volume in medical data exist, but thanks to increasing performance of modern computers it is possible to implement new algorithms, which are not present in today's software tools. The result of this work is a system which segments and measures volume in medical data. We also perform benchmarks, which expose an error of the measurement with...
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