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Detection of persons and evaluation of gender and age in image data
Dobiš, Lukáš ; Vičar, Tomáš (oponent) ; Kolář, Radim (vedoucí práce)
This master thesis describes an approach for automated human recognition by using convolutional neural networks (CNN) to perform facial analysis of persons face in image data. The predicted biometric indicators are following: age, gender, facial landmarks and facial expression. CNN architectures with pretrained weights for each task are described. Age estimation CNN has new weights trained and freezed, then has added new LSTM layers into its architecture. New LSTM layers are trained and tested on newly created video data set. Test results indicate improved age prediction accuracy. Solution for human recognition inference with single image and time series variants, in form of script with interconnected CNNs is explained, and its inference speed performance supports further proposed expansion plans for live video inference.
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Interconnection of Restricted Boltzmann machine method with statistical physics and its implementation in the processing of spectroscopic data
Vrábel, Jakub ; Hrdlička, Aleš (oponent) ; Pořízka, Pavel (vedoucí práce)
In this work, connections between statistical physics and machine learning are studied with emphasis on the most basic principles and their implications. Also, the general properties of spectroscopic data are revealed and used beneficially for improving automatized processing of the data. In the beginning, the partition function of a Boltzmann distribution is derived and used to study the Ising model utilizing the mean field theory approach. Later, the equivalence between the Ising model and the Hopfield network (machine learning model) is shown, along with an introduction for machine learning in general. At the end of a theoretical part, Restricted Boltzmann Machine (RBM) is obtained from the Hopfield network. Suitability of applying RBM to the processing of spectroscopic data is discussed and revealed by utilization of RBM to dimension reduction of the data. Results are compared to the standard tool (Principal Component Analysis), with discussing possible further improvements.
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Deep Learning Algorithms on Embedded Devices
Hadzima, Jaroslav ; Boštík, Ondřej (oponent) ; Horák, Karel (vedoucí práce)
This paper describes currently widely used Deep Learning architectures and methods for object detection and classification in video, with intention of using them on embedded systems. We will cover steps and reasoning when choosing the most appropriate embedded hardware for our application. Our test application consists of vehicle detection and free parking space detection using Deep learning methods, all wrapped under name Smart car park. This application provides monitoring of vehicle presence in car park and if they occupy parking spot or not. All this is expected to be done using embedded device. Later, there will be covered configuration steps for our embedded device with emphasis on hardware optimization for speed. We will provide comparison of available inference models, which will be rated mostly in categories like speed or F1 score, which have the biggest impact in our application. The best candidate will be selected and used for testing of our application.
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Využití strojového učení pro kontrolu kvality v průmyslových aplikacích
Gaško, Viktor ; Dobrovský, Ladislav (oponent) ; Parák, Roman (vedoucí práce)
Cieľom tejto bakalárskej práce je zoznámiť sa s problematikou kontroly kvality v priemyselných aplikáciách so zameraním na hlboké učenie. K tomuto a podobným problémom bolo vytvorených niekoľko knižníc, ktoré majú za úlohu uľahčiť jeho riešenie. Hlavnou úlohou je vytvorenie programu na kontrolu kvality za pomoci programovacieho jazyka Python a frameworku Tensorflow. Tento program bude pozostávať z troch neurónových sietí, pričom jedna zistí približnú polohu súčiastky, druhá jej farbu a tretia skontroluje správnosť jej výroby.
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Deep Learning Model Uncertainty in Medical Image Analysis
Drevický, Dušan ; Kolář, Martin (oponent) ; Kodym, Oldřich (vedoucí práce)
This thesis deals with quantifying uncertainty in the predictions of deep learning models. While they achieve state of the art results in many areas of computer vision, their outputs are usually deterministic and provide by themselves little information about how certain the model is about its prediction. This is important especially in the domain of medical image analysis where mistakes are costly and the ability to filter uncertain predictions would allow a supervising physician to review the relevant cases. This work applies several different uncertainty measures developed in recent research to deep learning models trained on a cephalometric landmark localization task. They are then evaluated and compared in a set of experiments which aim to determine whether each of the uncertainty measures provides us with useful information about the model's confidence in its predictions.
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Detection of Malicious Websites using Machine Learning
Šulák, Ladislav ; Černocký, Jan (oponent) ; Beneš, Karel (vedoucí práce)
This thesis deals with the problem of web-based malware focusing on the analysis and detection of malicious JavaScript placed on the client side using machine learning techniques.Proposed approach benefits from both known and new observations regarding differencesbetween malicious and benign samples. Such approach has a potential to detect brand newexploits and zero-day attacks. System for such detection has been implemented using multiple machine learning models. Performance of the models has been evaluated with F1-scoreby executing multiple experiments. According to the experiments, the application of decision tree classifiers was the most effective option. The most effective model was Adaboostclassifier which reached F1-score up to 99.16 %. This model worked with 200 instances ofrandomized decision tree based on Extra-Trees algorithm. Multi-layer Perceptron was thesecond-best model with achieved F1-score up to 97.94 %.
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Konvoluční neuronové sítě
Lietavcová, Zuzana ; Zbořil, František (oponent) ; Zbořil, František (vedoucí práce)
Táto práca sa zaoberá problematikou učenia konvolučných neuronových sietí. Ide o druh hlbokých neuronových sietí, ktoré sa v súčasnosti hojne používajú predovšetkým v oblasti rozpoznávania obrazu a spracovania prirodzeného jazyka. Práca popisuje špecifiká konvolučných neuronových sietí oproti tradičným neuronovým sieťam a zameriava sa na vnútorné výpočty, ktoré realizujú pri učení. Konvolučné neurónové siete sa typicky skladajú z niekoľkých typov vrstiev neurónov a cieľom práce je demonštrovať výpočet jednotlivých typov vrstiev. V práci bol navrhnutý a implementovaný demonštračný program učenia jednoduchej konvolučnej siete s využitím vlastnej implementácie neurónovej siete. Správnosť implementácie bola overená natrénovaním siete pre riešenie klasifikačnej úlohy, boli vykonané experimenty s rôznymi architektúrami sietí a ich výsledky porovnané.
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Deep Neural Networks Used for Customer Support Cases Analysis
Marušic, Marek ; Ryšavý, Ondřej (oponent) ; Pluskal, Jan (vedoucí práce)
Artificial intelligence is remarkably popular these days. It can be used to resolve various highly complex tasks in fields such as image processing, sound processing, natural language processing, etc. Red Hat has an extensive database of resolved support cases. Therefore an idea was proposed to use these data for data mining and information retrieval in order to ease a resolution process of the support cases. In this work, various deep neural network models were created for prediction of features which could help during the resolution process. Techniques and models used in this work are described as well as their performance in the specific tasks. Comparison of individual models is outlined as well.
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Trénovatelná segmentace obrazu s použitím hlubokých neuronových sítí
Majtán, Martin ; Burget, Radim (oponent) ; Harár, Pavol (vedoucí práce)
Diplomová práca sa zaoberá segmentáciou obrazu pomocou hlbokých neuronových sietí. V práci je popísaný princíp digitálneho spracovania obrazu a segmentácia obrazu. Je tu vysvetlený princíp umelých neurónových sietí, model umelého neurónu, spôsob ako sa neurónové siete trénujú a aktivujú. V praktickej časti je vytvorený algoritmus na generovanie podobrazov zo snímkov z magnetickej rezonancie. Vygenerované podobrazy sa používajú na trénovanie, testovanie a validáciu modelu neurónovej siete. V práci je vytvorený model umelej neurónovej siete, ktorí bol použitý pri trénovateľnej segmentácii obrazu. Model neurónovej siete je vytvorený pomocou knižnice Deeplearning4j a je optimalizovaný na paralelné trénovanie pomocou knižnice Spark.
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