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XMPP Client Using Nokia Qt SDK
Vaňák, Tomáš ; Mlích, Jozef (referee) ; Bařina, David (advisor)
This thesis describes the creation of application in a development environment Qt Nokia SDK. It emphasizes the differences between development of desktop applications and describes the steps necessary to create a functional mobile applications. This thesis also describes the basics of XMPP protocol. The resulting application is simple XMPP client.
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Implementation of Statistical Compression Method
Šreibr, Jakub ; Polok, Lukáš (referee) ; Bařina, David (advisor)
In this thesis statistical methods for data compression are presented. It deals with projecting of compression process and with it's implementation in a form of program library, which is created in language C++. Description and analysis of compression methods are discussed. The results of tests, which were performed with different compression methods are demonstrated.
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Dictionary Methods of Data Compression
Černičko, Sergij ; Polok, Lukáš (referee) ; Bařina, David (advisor)
The aim of this thesis is to analyse dictionary methods of data compression and their characteristics. The work is focused on and hands out detail overview of dictionary methods LZ77, LZ78, LZSS, LZW, DEFLATE and LZX. Principles of these methods and also general theory of compression is described. In conclusion all methods are tested and results analyzed.
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Comparison of Image Processing Libraries
Krúpová, Lenka ; Polok, Lukáš (referee) ; Bařina, David (advisor)
This bachelor thesis deals with comparison of image processing libraries. This document describes brief introduction into the field of image procesing. There are wide analysis of OpenCV, GD, GIL, ImageMagick, GraphicsMagick, CImg, Imlib2 libraries. The text aims at C and C++ language interfaces of these libraries. The end of the thesis is dedicated to comparison of libaries from various points.
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Medical Image Data Compression
Šebek, Jiří ; Bařina, David (referee) ; Kršek, Přemysl (advisor)
This thesis deals with several lossless methods of image compression. The main goal is to achieve the best compression ratio for set of medical images. This paper provides brief introduction into the data compression theory. It also contains design of image compression and description of designed compression modules implementation. Also the verifi cation of suitability of designed method for medical images compression is involved.
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Temporal Image Interpolation
Černý, Pavel ; Bařina, David (referee) ; Španěl, Michal (advisor)
This thesis deals with issues of image interpolation between two key frames. Main objectives of the work are design and implementation of application which interpolates images using optical flow estimation based on Farnebäck method. Application computes pictures by two methods, which use two-way interpolation. The first method selects a pixel with neighborhood and the second method selects only pixel and blurs it into a new frame. Testing was carried out on data describing the different types of movements. If the estimation of optical flow was correct, interpolation was successful, otherwise the interpolated pictures were inaccurate. Especially it was the key frames with a small gradient or with an indeterminate movement.
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Enhanced HTML Editor
Králík, Tomáš ; Bařina, David (referee) ; Řezníček, Ivo (advisor)
Subject of this bachelor's thesis was design of extended HTML editor. Reader is familiarized with HTML and JavaScript languages at first. Following is overview of existing WYSIWYG HTML editors and their comparison. The design of extended HTML editor requires a specification of disadvantages of existing editors. From these, the requirments for extended HTML editor were formed. The editor was designed and implemented using JavaScript and Dojo library. Two web applications were created for testing: blog and encyclopedia. The blog application was used for an user interface testing. Users tried out designed editor and editor TinyMCE during the testing. The results of the testing are summarized in conclusion together with proposal of a future work.
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Image Compression Using the Wavelet Transform
Přikryl, Lukáš ; Maršík, Lukáš (referee) ; Bařina, David (advisor)
The thesis discusses the image compression using the wavelet transform. The compression itself is done by EZW, SPIHT or EBCOT Tier1 algorithms. These algorithms are then compared to JPEG and JPEG2000 standards. Furthermore tiles, various wavelets and RGB and Y'CbCr color spaces were used to determine the influence on an image compression quality.
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Implementation of Statistical Compression Methods
Ftorek, Peter ; Polok, Lukáš (referee) ; Bařina, David (advisor)
The aim of this thesis is to describe statistical methods for data compression. Introduction covers theoretical minimum of data compression. Center of the work is about description of each method and implementation of Burrows-Wheeler compression algorithm in C programming language. It contains test results of each method and their evaluation.
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Image Denoising
Jurák, Martin ; Svoboda, Pavel (referee) ; Bařina, David (advisor)
Digital images are often corrupted by noise. Therefore, a lot of methods were designed for the purpose of denoising images. This paper describes and compares three of these methods: low-pass filters, bilateral filter and wavelet thresholding. Low-pass filters are linear filters applied on image by convolution. Their disadvantage is making images smooth. Bilateral filter is an extension of low-pass filters. It smooths images as well, however it preserves edges. Wavelet thresholding is a more complex method using wavelet transform for time-frequency representation of image whose coefficients are thresholded. The downside of this method is making artifacts in images. The PSNR and SSIM methods are used for measuring image quality.
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