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Handwriting and Signature Verification
Beránek, Jan ; Řezníček, Ivo (referee) ; Španěl, Michal (advisor)
This paper concerns methods of verification of person's signature and handwriting. Some of commonly used techniques are resumed and described with related literature being referred. Next aim of this work is design and implementation of a simple handwriting verification application. Application is based on edge detection and comparison of a set of structural and statistical features. As a support classification tool a SVM classifier of the LIBSVM software is employed. The Application is written in C language using OpenCV graphics library. Testing and training set was extracted from samples found in the IAM Handwriting Database. Application was created and tested in the Windows XP operating system.
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Subdivision Surfaces
Otočka, Dávid ; Španěl, Michal (referee) ; Sumec, Stanislav (advisor)
The object of my bachelor work was to create a library, that will realise the technique of Subdivision Surfaces and demonstrate the functionality of the library on different examples. The library as well as the program is written by using C++ language, for window creation is used WinAPI and for work with the graphics OpenGL. There are three implemented algorithms and those are Butterfly, Loop and Catmull-Clark. For demonstration are used few basic objects, that are implemented directly in the library.
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Content Based Photo Search
Dvořák, Pavel ; Beran, Vítězslav (referee) ; Španěl, Michal (advisor)
This thesis covers design and practical realization of a tool for quick search in large image databases, containing from tens to hundreds of thousands photos, based on image similarity. The proposed technique uses various methods of descriptor extraction, creation of Bag of Words dictionaries and methods of storing image data in PostgreSQL database. Further, experiments with the implemented software were carried out to evaluate the search time effectivity and scaling possibilities of the design solution.
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Interactive Medical Image Segmentation
Kříž, Radim ; Štancl, Vít (referee) ; Španěl, Michal (advisor)
This work deals with the possibilities of interactive segmentation of medical image data using a ITK library and segmentation method level-set. It discusses the possibilities of an interactive influencing of segmentation with user-defined edges and facilitate segmentation using modes allow automatic adjustment of parameters. An integral part of this work is user-friendly segmentation tool built on ITK library and segmentation method level-set, which clearly demonstrates the possibilities of modes and added edges in practice. Design and implementation of this tool is also part of this work.
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Polygonal Mesh Segmentation
Švancár, Matúš ; Kodym, Oldřich (referee) ; Španěl, Michal (advisor)
This bachelor thesis analyzes and approaches the issue of segmentation of polygonal models. It presents a design of an interactive method inspired by the method described in the Interactive Mesh Segmentation Based on Feature Preserving Harmonic Field. The method uses graph-cut and is implemented as a web application. The application supports .obj and .stl file formats, allows the user to load a model, draw sketches representing foreground and background on the surface of the model, and to start segmentation. Once completed, the user can download the resulting models or continue segmenting with one of them.
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Robot Localization Using Camera
Heřman, Petr ; Španěl, Michal (referee) ; Beran, Vítězslav (advisor)
The objective of this work is to design a simple localization method and its implementation in robot operating system ROS. This method uses a monocular camera as the only sensor and estimates the position in a known map. In experiments with prototypes are tested key points of type SURF, SIFT and ORB.
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Deep Learning for Medical Image Analysis
Szöllösi, Albert ; Kodym, Oldřich (referee) ; Španěl, Michal (advisor)
This thesis offers possible solution to automatic 3D dental scan landmark localization. These scans are used in dental crown design and digital orthodontics to make the design process easier using specialized software. Before that, though, the scan has to be annotated for the software to know the positions of the teeth. The annotation process is done manually, which guarantees precision, but takes a lot of time. The result of this work could make said process much simpler by applying deep learning. Landmark localization was implemented using a convolutional neural network.
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Python Imaging Library
Mágr, Martin ; Španěl, Michal (referee) ; Vyskočil, Michal (advisor)
This bachelor thesis is engaged in concept and implementation of graph editor, which is connected with concrete information system using protocol XML-RPC. The application is created using programming language Python and its graphic library Python Imaging Library. Graphic user interface is realized by GTK+ or more precisely by PyGTK, its application program interface for Python.
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Video-Based Human-Computer Interface
Caha, Miloš ; Beran, Vítězslav (referee) ; Španěl, Michal (advisor)
A bachelor thesis deals with methods about a detection of direction of look and with theirs following applications for PCs control. The thesis summarises and describes the most widely used methods for individual phases of the mentioned detection. Especially, use of a face detector and of convolution filters for searching of significant points in the face is used. The work is concentrated on a design and a description of an implementation of the application which demonstrates the method of contactless PCs control.
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Gaze Detection
Caha, Miloš ; Herout, Adam (referee) ; Španěl, Michal (advisor)
Main object of this work is to design and implement the algorithm for look direction determination, respectively the head movement. More specifically, it is a system that searches face in the video and then detects points, suitable for view direction estimation of tracked person. Estimation is realized using searching transformation, which has been performed on key points during head movement. For accuracy enhancement the calibration frames are used. Calibration frames determines the key points transformation in defined view directions. Main result is an application able to determine deflection of head from straight position in horizontal and vertical direction for tracked person. Output doesn't contain only information about deflection direction, but it also contains the size of deflection.
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