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Advanced processing of ophthalmologic videosequences of retinal images
Říha, Pavel ; Odstrčilík, Jan (referee) ; Jan, Jiří (advisor)
The diploma thesis deals with registration and analysis of images from the experimental low-cost fundus camera that reaches a low SNR (around 10 dB) and low temporal and spatial resolution. The aim of the diploma tesis is to explore the possibilities of digital processing leading to the creation of a videosequence that has real benefits for medical diagnostics. The well-known program elastix is used for registration. Preprocessing filters and interpolation are implemented in Matlab. The program provides a wide range of setting options, out of which many combinations were tested and evaluated. To assess the accuracy achieved, spatial variations in the detected motion of blood-vessels are evaluated. Best results with a precision below 0.3 px were achieved by using a band-pass filter, a~suitably sized mask, rigid registration and a metric of the mutual information. Test sequences were registered precisely enough both for visual assessment and basic computational analysis. Registered sequences and the developed application that both can be used in the further development of the experimental camera are the main contributions of the diploma thesis.
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Forestry cableway remote diagnostics
Říha, Pavel ; Pazdera, Ivo (referee) ; Klíma, Bohumil (advisor)
This bachelor's thesis focuses on description of electronics and controllers of forestry cableways Larix. The stress is laid on controlling system among others working with GSM modem securing the communication with remote monitoring centre. The analysis of the need of local as well as remote diagnostics leads to definition of requirements for communication channel that needs to be secured. Applying GSM net and communicate through standardised industrial modems connected through port RS232 is suggested as the most effective solution. The main part of the dissertation includes particularities and possibilities of communication through GPRS service. All-embracing communication channel including the server that transfers data packets among particular clients is designed and programmed. The final part summarizes achieved results and outputs of testing compiled solution including data throughput and response. Simultaneously based on acquired experience some procedures for final implementation in evolution and production of new types of cableways are recommended.
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Production of car wheel cover
Říha, Pavel ; Kandus, Bohumil (referee) ; Žák, Ladislav (advisor)
The Master’s thesis is concentrated on a thermoplastic injection technology and in particular on heat balance of tool. In the theoretical part, literary study, is shortly described actual knowledge in these branches. In the practical part is solved the design of tool for production of the specific plastic part. This thesis insists on the proposal and selection of applicable cooling system in the tool and on optimization of the technology parameters of injection proces. Those proposals are evaluated by simulation software Cadmould 3D-F. In the end of this thesis is performed the economic analysis of plastic part production costs.
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Production single parts from thermoplastic "Magazine cover"
Říha, Pavel ; Kandus, Bohumil (referee) ; Žák, Ladislav (advisor)
The Bachelor´s thesis is concerned about thermoplastic injection technology. In the theoretical part are described actual knowledge in branch of thermoplastic injection and there are summarized the recommendations for design of injection mould also. The practical part describes the prototype injection mould design for designated plastic part. One of chapters includes technology analysis of plastic part. The mould is projected in Pro/Engineer Wildfire 4.0 software including complete technical documentation . In the end of this thesis is performed economic analysis of production costs.
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Laboratory power supply
Říha, Pavel ; Petržela, Jiří (referee) ; Götthans, Tomáš (advisor)
This bachelor's thesis deals with design, simulation and realization of a prototype of regulated laboratory power supply with adjustable current protection by potentiometers with measuring and displaying the output voltage and current using a microprocessor and LCD display with adjustable voltage range of 0 - 30V and current 0-3A. The thesis also includes design of power transistor cooling and the results of testing functional prototype.
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International Taxation of Incomes Received from Austria
Slámová, Klára ; Říha, Pavel (referee) ; Brychta, Karel (advisor)
This bachelor´s thesis deals with the tax liability of a taxpayer, a tax resident of the Czech Republic, which both receive income from sources in our country, as well as from Austria. The bachelor´s thesis analyzes the avoidance of double taxation with Austria in order to propose a methodology to taxation income through model examples. Practical part is focused on income from employment.
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Coregistration of diffusion weighted MRI data with high b-values
Špaček, Vojtěch ; Říha, Pavel (referee) ; Vojtíšek, Lubomír (advisor)
This bachelor thesis deals with the coregistration of diffusion-weighted MRI data with high b-values. The aim is to compare selected coregistration methods on real data and to quantify the quality of the output. The theoretical part presents the principle of diffusion imaging, the effect of b-value on the image and different methods of data preprocessing with a focus on the possibilities of coregistration of images with varying contrast. In addition, available software tools and methods for assessing the quality of coregistration are introduced. In the practical portion of the paper, preprocessing of diffusion data, including coregistration by the selected methods, is performed and the quality is analyzed using statistical measures.
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