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X-ray computed tomography artifacts simulation
Koťová, Markéta ; Kolář, Radim (referee) ; Drastich, Aleš (advisor)
The bachelor's thesis deals with CT artifacts modeling generated during the acquisition process. The theoretical part summarizes principles of CT and origin of artifacts. The practical part consists of a newly developed simulator, which includes ring, motion, metal, streak and aliasing artifacts. Finally, the new laboratory exercise was designed.
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Image reconstruction form projections
Gargulák, Dušan ; Kolář, Radim (referee) ; Jiřík, Radovan (advisor)
This semestral work deals with the principle of the image reconstruction from projections, which is the basis for the modern method of the RTG computed tomography (CT RTG). The work is above all focused on the Simple BackProjection and Filtered BackProjection. In the first part there are outlined theoretical principles, which explain Radon Transform and inverse Radon Transform. There is also cleared up the process of the Simple BackProjection. The next part of the work contains the practical aplications of Radon Transform and Simple BackProjection, which was made in MATLAB. There is described the script for the projection generating and the script for the Simple BackProjection process. As the last item there is annotated the graphic interface for the mentioned aplications.
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Motion-Blurred Image Restoration
Rajnoch, Zdeněk ; Seeman, Michal (referee) ; Bařina, David (advisor)
Goal of this thesis is restauration of motion blurred images. Motion blurr is assumed to be only over a narrow line rotated by any angle to x axis. There are several methods which are theoretically explained and compared on synthetically blurred images in several different conditions. After that motion blurred images are restaurated with some of deconvolution methods.
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Image reconstruction form projections
Gargulák, Dušan ; Kolář, Radim (referee) ; Jiřík, Radovan (advisor)
This semestral work deals with the principle of the image reconstruction from projections, which is the basis for the modern method of the RTG computed tomography (CT RTG). The work is above all focused on the Simple BackProjection and Filtered BackProjection. In the first part there are outlined theoretical principles, which explain Radon Transform and inverse Radon Transform. There is also cleared up the process of the Simple BackProjection. The next part of the work contains the practical aplications of Radon Transform and Simple BackProjection, which was made in MATLAB. There is described the script for the projection generating and the script for the Simple BackProjection process. As the last item there is annotated the graphic interface for the mentioned aplications.
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Seismic Tomography - historical development and application
Mityska, Martin ; Vilhelm, Jan (advisor) ; Karousová, Hana (referee)
The goal of this bachelor thesis is to offer an overview on technics of seismic tomography, their history and general usage. It's focused mainly on description of pioneering efforts in building mathematical tools of tomography and their application in geophysics. Methods mainly discussed are: Herglotz - Wiechert inversion, first numerical studies like ACH teleseismic method, Aki & Lee method of local sources inversion and early global mantle velocity studies. There are also discused some shortcomings of tomagraphy models and their influences on interpretation of results.
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Motion-Blurred Image Restoration
Rajnoch, Zdeněk ; Seeman, Michal (referee) ; Bařina, David (advisor)
Goal of this thesis is restauration of motion blurred images. Motion blurr is assumed to be only over a narrow line rotated by any angle to x axis. There are several methods which are theoretically explained and compared on synthetically blurred images in several different conditions. After that motion blurred images are restaurated with some of deconvolution methods.
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X-ray computed tomography artifacts simulation
Koťová, Markéta ; Kolář, Radim (referee) ; Drastich, Aleš (advisor)
The bachelor's thesis deals with CT artifacts modeling generated during the acquisition process. The theoretical part summarizes principles of CT and origin of artifacts. The practical part consists of a newly developed simulator, which includes ring, motion, metal, streak and aliasing artifacts. Finally, the new laboratory exercise was designed.
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