|
|
Deep Learning for 3D Mesh Registration
Pukanec, Dávid ; Beran, Vítězslav (referee) ; Španěl, Michal (advisor)
Zosúhlasovanie 3D modelov je často robené za pomoci registrácie mračien bodov. Úloha registrátie spočíva v nájdení transformácie, ktorá na seba zarovná dané mračná bodov. Existuje mnoho metód založených na hlbokom učení, ktoré sa daju deliť do dvoch kategórií. Tieto metódy zvyčajne poskytujú vyhodnotenie v rámci jednej kategórie a navyše na ro- zličných datasetoch či metrikách. Táto práca sa zaoberá hlbším prieskumom metód Lepard a FINet. Za pomoci datasetov ModelNet40 a Teeth3DS je vykonaná séria experimentov zameriavajúca sa na zložíté prípady registrácie. Experimenty ukázali, že FINet dokáže zarovnať predtým nevidené tvary s translačnou chybou 4.16% veľkosti modelu a rotačnou chybou 3.640 stupňov. Zatiaľ čo Lepard má translačnú chybu 6.73% veľkosti modelu a rotačnú chybu 7.265 stupňov.
|
|
|
14th International Bordetella Symposium
Šebo, Peter
We shall discuss the latest research achievements in the Bordatella/pertussis filed and how to tackle the challenge of current pertussis resurgence. We will assess what needs to be done to overcome the limitations of current acellular pertussis vaccines in order to curb the resurgence and transmission of whoopong cough.
|
|
|
Superpixel-based image segmentation to improve Intra-frame prediction
Soukeník, Ondřej ; Fliegel, Karel (referee) ; Polák, Ladislav (advisor)
This diploma thesis gives an overview of the technologies used for compression image data, video quality measurement methods and image segmentation methods. The thesis is divided into five chapters. The first chapter gives a brief overview of of the technologies and architectural elements used in image and video compression. The second chapter provides a brief overview of objective video and image quality metrics. The third chapter gives an overview of image segmentation methods and at the end of this chapter a new optimized implementation of SLIC is described. The fourth chapter aims to describe the modification of the rav1e encoder of the AV1 standard. The fifth chapter contains an experimental section where the encoder modification is verified and results are analyzed and presented in a summarized form.
|
|
|
The Role of Incoterms 2020 in the Current Practice of Czech Export Companies
BERKOVÁ, Vanessa
The diploma thesis deals with the set of international rules Incoterms 2020, which are the most used business practices in international trade regulating the rights and obligations of sellers and buyers. The main aim of the work is to evaluate their use and implementation in the current practice of Czech export companies from the engineering industry. The specific goal is to find out whether Czech export companies use Incoterms delivery clauses and what specific clauses they apply in international trade. An equally important goal is the identification of problematic points that clauses bring. The theoretical part describes international trade, trade policy instruments, risks, transport and insurance in international trade, export and mainly Incoterms. The practical part consists of a description of the Czech engineering industry and an evaluation of the questionnaire survey. The questionnaire consisted of 19 questions, and it was completed by 265 respondents out of a total of 2 200 addressed companies. The questionnaire was distributed to the representatives of selected companies through e-mail communication. The result of processing the questionnaire survey was the interpretation of individual questions and their mutual comparison. Then the established hypotheses were evaluated. The research results indicate that Incoterms are widespread and important in the practice of Czech export companies focusing on engineering. The most used delivery clause is EXW (Ex Works). However, to achieve effective use of Incoterms, it is important to ensure the correct interpretation of delivery clauses, their application and clear communication between business partners.
|
|
|
Let the Crowd be Heard - A Crowdsourcing-based Study on Video Coding
Zach, Ondřej
In this paper, we present a crowdsourcing-based study on video codec comparison. We compared the perceived quality of sequences encoded using H.264 and H.265 algorithms. The main advantage of the study is, that the users could watch the videos in their natural environment using their own equipment. The results show, that H.265 may not bring a significantly better quality in SD scenarios, however, in other scenarios, the use of H.265 might be preferred.
|
|
|
The study of PET bottles in terms of the content of risk elements
Kryštofová, Petra ; Řezáčová, Veronika (referee) ; Komendová, Renata (advisor)
This bachelor thesis deals with the issue of PET bottles in terms of the possible content of risk elements. The contents of antimony, copper and lead were determined in the PET packaging material and in the beverages contained in the bottles. A total of 15 samples of bottled still and infant water available in the Czech sales network were analyzed. The PET material was decomposed in an acidic medium under the action of microwave radiation under optimized conditions. Atomic absorption spectrometric methods with flame or graphite cuvette atomization were used to determine selected risk elements based on the predicted analyte concentrations. In the PET packaging material, 159.35 to 265.68 mgkg-1 of antimony were determined, the determined values of lead concentration were in the range of 10.96-20.23 mg·kg-1 and the copper concentration in the range of 0.11-7,52 mg·kg-1. In bottled water and in bottled infant water, antimony was identified only in samples labeled 6a, 8a, 9a and 15a, all lead concentrations were measured below LODPb, copper was determined only in samples 2a, 6a and 8a. In none of the samples did the concentrations given by the valid legislation be exceeded. The limits of these metals are not set in legislation in the packaging materials, only specific migration limits and they have not been exceeded. However, the high concentration of antimony in PET poses a potential risk of contamination of the contents of these packages.
|
|
|
Advanced algorithms for compression of video sequences with ultra high resolution
Soukeník, Ondřej ; Kratochvíl, Tomáš (referee) ; Polák, Ladislav (advisor)
This bachelor thesis provides an overview of advanced video codecs and explores their applicability for compression ov videosequences in ultra high resolution (UHD). The thesis is divided into two parts, theoretical and experimental. The theoretical part of the thesis gives an overview of advanced video codecs for video compression. Furthermore, objective metrics used for evaluation of the quality of a compressed video are briefly described. This part of the thesis also contains a detailed description of the created tool, employing a reference implementation of the selected video codecs, for easy compression of video sequences in UHD. This tool is used in the experimental part to compress different video sequences. The compression efficiency of each video codec is evaluated in terms of different objective metrics. Furthermore, the Bjntegaard Delta analysis is employed to obtain infromation about the compression efficiency of the used video codecs.
|
|
|
Effect of Noise on Video Compression
Anton, Matyáš ; Drábek, Vladimír (referee) ; Bařina, David (advisor)
Videos are in fact image signals and as such, they are susceptible to distortions in the form of noise. This thesis' goal was to determine how the presence of noise can affect the results of image data compression as well as what impact might the lossy compression have on the noise present. Four contemporary compression formats were chosen, namely H.264, H.265, Motion JPEG 2000 and DIRAC, representing different approaches to the video compression, especially the contrast between a discrete cosine transform and a discrete wavelet transform.
|
|
|
Performance analysis of the newest video encoding standards
Klejmová, Eva ; Polák, Ladislav (referee) ; Slanina, Martin (advisor)
The aim of this work is to describe state-of-the-art high-definition video compression algorithms. The thesis focuses on the differences between algorithms and their functionality. Procedures for video sequences compression based on reference implementations of selected codecs are being proposed and their important parameters are being discussed. Bachelor's thesis deals with comparison of reference implementations based on subjective and objective video quality measurements and time requirements. The graphic interface for selected codecs has been also designed.
|
|
|
Comparison of Video Codecs
Urbánek, Pavel ; Svoboda, Pavel (referee) ; Bařina, David (advisor)
This thesis is aimed at analysis of video codecs and their comparison. First part of this document provides reader with the basic information on encoding and decoding process including high level description of often used algorithms. It describes codecs and the process of standardization. Second part is focused on test specifications and codecs comparsion itself including conclusion. PSNR, SSim and BD-PSNR are key methods used for comparing codecs.
|
guest ::
