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Changes in perception of subjective vertical in cerebrovascular accident patients
Kříž, Petr ; Čakrt, Ondřej (advisor) ; Bitnar, Petr (referee)
Cerebro-vascular accident often affects parts of brain responsible for spatial orientation. Optimal integration of afference from visual, somatosensory and vestibular system is necessary for maintaining balance and often in the end for the functional indepencence of the patient. Examination of subjective vertical is a sensitive signifier for spatial orientation and the ability to discern graviception. By using clinical examination of subjective visual vertical it is possible to objectify and quantify graviception disorder excluding visual context. Current level of understanding in this field is briefly summarized in theoretical part of this study. In practical part subjective visual vertical examination by bucket-method was for statistically comparison of 29 patients after a cerebro- vascular accident with 34 healthy seniors. Hypotheses about the influence of a side of a lesion and a time elapsed since the lesions were also tested. The study concludes that the perception of verticality in patients after cerebro- vascular accident can be severely affected. Additionally, the study highlights the reliability of examination of patients after cerebro-vascular accident using clinically practical bucket-method.
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Masked face recognition
Kašpar, Jan ; Kříž, Petr (referee) ; Přinosil, Jiří (advisor)
This bachelor thesis focuses on the recognition of people with covered faces. The work describes four algorithms InsightFace, FaceNet, OpenFace, and face recognition. From these algorithms, the most suitable for recognizing people with a covered face is selected. Two databases of persons are created, and two models for the recognition of persons are trained; one is for the recognition of persons with a covered face and the other for non-covered persons. ROC curves are created for these models to determine the accuracy of the models. The created program is used to recognize people or to add them to the database created by SQLite.
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4K real-time video encoding using NVENC technology
Buchta, Martin ; Přinosil, Jiří (referee) ; Kříž, Petr (advisor)
Diploma thesis is focused on real-time 4K video encoding using NVENC technology. First chapter describes the most used video codecs H.264 and HEVC. There is an explanation of the principle of graphic cards and their programmable units. Analysis of the solution of open source Video Codec SDK is also part of the thesis. The main focus of the thesis is an implementation of an application which can handle 4K video encoding from multiple cameras in real time. Performance and qualitative tests were performed for application. Results of these tests were analyzed and discussed.
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Masked face detection
Malý, Ondřej ; Kříž, Petr (referee) ; Přinosil, Jiří (advisor)
The aim of this work is to study and test current methods for face detection on veiled faces and evaluate the results. In the first chapter, five selected methods are theoretically analyzed and in the second chapter the individual methods are evaluated, both for the Wider Face file and for the actual set of photos with veiled faces. Subsequently, the Dlib CNN method is improved for better detection of veiled faces and reprogrammed to detect the degree of veil from the tested image
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Object tracking in video sequence using the integral histogram
Přibyl, Jakub ; Kříž, Petr (referee) ; Dorazil, Jan (advisor)
This thesis focuses on object tracking in real-time. Tracked object is defined by bounding rectangle. The thesis works on issue of image processing and using histogram for real-time object tracking. The main contribution of the work is the extension of the provided program to track object in real-time with changing bounding rectangle. Size of the rectangle is changing as the object moves closer of further from camera. Furthemore the detection behavior in different scenarios is analyzed. In addition, various weight calculations were tested. The program is written in C++ using OpenCV library.
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Online vibration diagnostics of the DATRON milling machine spindle
Kříž, Petr ; Hammer, Miloš (referee) ; Jankových, Róbert (advisor)
This master’s thesis deals with online vibration diagnostics of the milling machine spindle. It is aimed at the implementation of the complex online vibration diagnostics system to chosen milling machine, the suggestion of the vibration measurement system and the suggestion of the evaluation of changes of the technical condition of this milling machine spindle. The description of the vibration diagnostics, the description of the milling machine spindle construction and function and the suggestions for the practical application of vibration diagnostics are also parts of this thesis.
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Software for manual focus of camera with 4K resolution
Sláma, Adam ; Přinosil, Jiří (referee) ; Kříž, Petr (advisor)
This Master thesis is focused on the analysis of currently used methods which whose target is to determine the rate of image focus. This analysis was used during the development of the program which evaluates the rate of image focus in percentage rate, works in real time and cooperates with a camera capable of 4k image resolution with a manual focus of the lenses. Application is then capable of a finding of a pre-defined image under certain circumstances which is being used for increasing of effectivity of image focusing. Another option is represented by a method that is searching the most suitable area for focusing in the center of the image. A detailed description of these methods and program itself are also included in the thesis. The final part of the thesis contains records of measurement tests with its results.
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Creation of the Graphic Library for VST Plug-Ins
Dufka, Filip ; Kříž, Petr (referee) ; Přikryl, Lubor (advisor)
Master‘s thesis covers use of graphical user interface in audio plug-ins. In first part structure and rendering techniques of audio plug-ins graphical libraries are described. Their efficiency and their way of memory utilization is questioned. Next part puts these techniques in comparison with the state of the art methods used in computer graphics and gaming industry. Their possible use in audio graphical interafaces is analyzed. In the following part, thesis finds solutions to uneffective methods in frequently used situations by presenting deferred shading into audio parameter editor with the goal of photorealistic rendering. Second introduced technique of „Knob Normal Maps“ reduces number of images needed for rendering of turning knob from hundereds to six with comparable results. Goal of diploma thesis was to create graphical library. Graphical library with name RealBox was created, and introduced techniques are the core features. Library reduces work needed to achieve graphical user interfaces for 2D and 3D cases of use. Full class and method documentation for RealBox library was assembled. Library was tested during creation of three VST plugins, with different approaches and emphasis on quick work and fine rendering. Graphical library offers new, faster way of creating audio plug-in interfaces.
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Software for cameras configuration design of the panoramic system
Jílek, Michal ; Grenar, David (referee) ; Kříž, Petr (advisor)
This work deals with software design in C ++ language and with graphical output using OpenGL for scanning tribune lenses of cameras with different parameters so that the user lens configurations are known beforehand in order to create panoramic coverage of the stadium stadium. The principle of image capture, lens parameters, and formulas for calculating their appropriate layout on the stadium to collect a panoramic image together is discussed. These are: focal length, viewing angles, coverage calculations, image resolution. Furthermore, a draft program implementing the issue.
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Software for cameras configuration design of the panoramic system
Jílek, Michal ; Grenar, David (referee) ; Kříž, Petr (advisor)
The basic laws of physics about light, the principle of image capture, camera parameters and formulas for calculations of their appropriate layout of the stadium so that the read together a panoramic image. Focal length, viewing angle, coverage calculations, image resolution. The transition from theory to practice – draft programme of the issue. The fundamentals of the C++ language OpenGL. Program instructions and samples.
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