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Adaptive data compression by neural networks
Kučera, Michal ; Přinosil, Jiří (referee) ; Koula, Ivan (advisor)
Point of the work is using of neural networks for the datecompression. This brings new possibilities as by lossless as lossy compression. Draft of a few compress algorithm show the behaviour, advantages and weak points of these systems. As the solution we use knowledge of the layered perceptron Network and we try by the change of the structure and subparameters to teach such network to compress the data, according to our entry requirement. These networks have also advantages, which are meanwhile impediment to the using practically. The goal of this is to try some algorithms, look into their characteristics and posibility of the using. Then propose next posibility solutions and upgrading of these algorithms.
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Synchronization Signal Generator for Musical Applications
Vácha, Lukáš ; Přinosil, Jiří (referee) ; Schimmel, Jiří (advisor)
This bachelor thesis deals with analysis of MIDI´s protocol and especially by the implementation of synchronization methods. The aim of this thesis is suggestion and creating of a prototype of equipment, which transmits one sort of synchronization code and enables its direct extension on produced equipment. First part of solution of this thesis deals with MIDI in general, its history, hardware definition and protocol analysis, especially by analysis of methods and by types of synchronization. The main attention is devoted to MIDI Click/SPP code, which is also implemented in created prototype. The second part of this thesis deals with proposal of hardware solution of prototype, where is parsed a principle of involvement and used components in detail. The third part describes software proposal of solving from necessary initializations of microcontrollers up to operations with individual circumferences. There is also analyzed a customer service. Last, fourth part of thesis deals with realization of prototype, its revival and testing. There is stated value of properties of prototype, some suggestions for possible extension and summary of achieved aims of this thesis in the end.
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Robot with autonomous audio-video control
Dvořáček, Štěpán ; Mašek, Jan (referee) ; Přinosil, Jiří (advisor)
This thesis describes the design and realization of a mobile robot with autonomous audio-visual control. This robot is able of movement based on sensors consisting of camera and microphone. The mechanical part consists of components made with 3D print technology and omnidirectional Mecanum wheels. Software utilizes OpenCV library for image processing and computes MFCC a DTW for voice command detection.
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Detection of plagiatorism in software projects in the BDS course
Szymutko, Marek ; Přinosil, Jiří (referee) ; Šeda, Pavel (advisor)
Plagiarism is a widespread problem, which can be fought by prevention or detection methods. This thesis contains a summary of plagiarism detection methods through automated means. To parse source code, an open-source abstract syntax tree compiler was employed. The functionality of this compiler was demonstrated in this thesis. To reduce the mutual visibility of students’ projects, a proposal for the submission process was created. GitLab cloud service was employed for this purpose. Initialization of these students’ spaces is performed via Bash scripts. Other scripts to archive and create spaces for groups of students in the GitLab service were also created. A similarity-detecting tool was created in Python programming language. This tool was specialized to be employed in the subject BPC-BDS for the detection of plagiarism in students’ assignments written in Java or Python. It can also be used in other subjects though. For similarity detection, numerical metrics and abstract syntax trees were used. The comparison output of the projects and their individual parts is represented with integer value and outputted into a tabular file of the format xlsx. This thesis also summarizes the strengths and weaknesses of the implemented solution and lists problems that were encountered in the process of implementation. A case study about plagiarism in the subject BDS in the academic year 2022/2023 is also included in this thesis.
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QR code detection using deep learning
Černohous, Matěj ; Kříž, Petr (referee) ; Přinosil, Jiří (advisor)
This bachelor thesis deals with the design of an algorithm for detecting and decoding QR codes in images using deep learning techniques. The work involved the construction of 2 datasets, a YOLOv7 neural network model for detecting QR codes in images, a YOLOv4-tiny neural network model for detecting position markers of QR codes, and a Python program utilizing these models to read QR codes in images. For evaluation, the algorithm was compared with other options for QR code reading.
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Fire and smoke detection in video
Buzovský, Viktor ; Říha, Kamil (referee) ; Přinosil, Jiří (advisor)
Thesis deals with possibilities regarding detection of fire and smoke in real enviroment video. The main task is to choose suitable model, train this model, and improve detection capabilities of the model afterwards. First part of thesis is summary of theoritical knowledge needed to have understanding of discussed technical necessities. The second, practical part presents the learned model and its subsequent attempts at improvement, firstly using optical flow and then using additional classification networks. The work is concluded with a final implementation for the detector of fire and smoke, and a proposal for its potential improvement is presented. The work also includes the datasets used and created, among other things.
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Multi-shuttle control system
Surový, Roman ; Říha, Kamil (referee) ; Přinosil, Jiří (advisor)
The aim of this work is the design of a partial concept and technical solution for the control system of carts that move within the racking system both horizontally and vertically. It is mainly about solving the problem of communication between individual trucks and planning the optimal route with safety in mind. The proposed system is implemented and verified in laboratory conditions. As part of the diploma’s work, the overall concept of the system is designed, the proposed method of intercar communication and verified in laboratory conditions.
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Forensic analysis of handwriting for the Czech environment using artificial intelligence
Stejskal, Jan ; Přinosil, Jiří (referee) ; Burget, Radim (advisor)
The analysis of handwriting is an important area of research in modern science. However, it is a very complex process because handwritten text can take on various forms. The use of artificial intelligence for analyzing and identifying text from different authors is nothing new in the world. Research in this area is, however, slightly lagging behind in the Czech environment. For this reason, several convolutional network architectures were proposed and compared in this work in an effort to find the most suitable structure for solving this problem. Of all the trained and tested models, the model based on the ResNet18 architecture achieved the highest accuracy, with a success rate of 92.2 % on a self-made database of 1328 samples with a resolution of 750x256. This result suggests that with a sufficiently large and high-quality database, the problem can be solved even in the Czech environment with its more complicated character set.
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Helmet for Virtual and Augmented Reality
Buš, Ondřej ; Přinosil, Jiří (referee) ; Říha, Kamil (advisor)
The thesis focuses on the construction of a functional headset for multimedia content consumption. The acquired theoretical knowledge was used in the design and construction of the resulting headset. The theoretical knowledge was consolidated and extended by practical tests on currently available commercial AR/VR headset solutions. In the practical design, increased effort was made to keep the resulting solution as simple as possible. The components that were used in the work can be obtained relatively easily via the internet. With the help of advanced techniques, the thesis tries to optimize the visual experience. The most suitable parameters of the optical lenses are selected. The optical system is enhanced to provide an extended horizontal field of view. The thesis discusses the fabrication of the headset using the 3D printing method on a 3D printer. Subsequently, the individual parts are assembled into a single functional unit. The result of the thesis is a working prototype headset suitable for multimedia content consumption.
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Real-time voice command recognition system
Šíbl, Evžen ; Kiac, Martin (referee) ; Přinosil, Jiří (advisor)
The bachelor thesis deals with the development of a system for voice command recognition. The classifier of this system was created using a neural network. In this thesis you will learn about the history and problems of speech recognition. A system has been created that detects a section in a recording containing a speech signal, which then uses the classifier to decide what word from the word table it is. Three models with the same architecture but with different training data were created. These models were then compared with each other. A simple user interface was created for the resulting system.
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