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Digitální metody zpracování trojrozměrného zobrazení v rentgenové tomografii a holografické mikroskopii / The Three-Dimensional Digital Imaging Methods for X-ray Computed Tomography and Digital Holographic MicroscopyKvasnica, Lukáš January 2015 (has links)
This dissertation thesis deals with the methods for processing image data in X-ray microtomography and digital holographic microscopy. The work aims to achieve significant acceleration of algorithms for tomographic reconstruction and image reconstruction in holographic microscopy by means of optimization and the use of massively parallel GPU. In the field of microtomography, the new GPU (graphic processing unit) accelerated implementations of filtered back projection and back projection filtration of derived data are presented. Another presented algorithm is the orientation normalization technique and evaluation of 3D tomographic data. In the part related to holographic microscopy, the individual steps of the complete image processing procedure are described. This part introduces the new orignal technique of phase unwrapping and correction of image phase damaged by the occurrence of optical vortices in the wrapped image phase. The implementation of the methods for the compensation of the phase deformation and for tracking of cells is then described. In conclusion, there is briefly introduced the Q-PHASE software, which is the complete bundle of all the algorithms necessary for the holographic microscope control, and holographic image processing.
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Vizualizace značených buněk modelového organismu / Visualization of Marked Cells of a Model OrganismKubíček, Radek Unknown Date (has links)
This master thesis is focused on volumetric data rendering and on highlighting and visualization of the selected cells of the model organisms. These data are captured by a confocal deconvolution microscope. Input data form one large volumetric block containing separate slices. This data block is rendered by an applicable method and then are identified and visualized the cells marked by the GFP (Green Fluorescent Protein) process or by chlorophyle fluorescency. The principal aim of this work is to find out the preferably optimal effective method enabling this highlighting, most preferably working without a manual check. Due to the data structure, this ambition seems hardly realizable, so it suffices to find out a manual working method. The last step is to embed the results of this work into FluorCam application, the confocal deconvolution microscope data visualizer.
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Hardware Acceleration of a Neighborhood Dependent Component Feature Learning (NDCFL) Super-Resolution AlgorithmMathari Bakthavatsalam, Pagalavan 22 May 2013 (has links)
No description available.
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Methods for 3D Structured Light Sensor Calibration and GPU Accelerated ColormapKurella, Venu January 2018 (has links)
In manufacturing, metrological inspection is a time-consuming process.
The higher the required precision in inspection, the longer the
inspection time. This is due to both slow devices that collect
measurement data and slow computational methods that process the data.
The goal of this work is to propose methods to speed up some of these
processes. Conventional measurement devices like Coordinate Measuring
Machines (CMMs) have high precision but low measurement speed while
new digitizer technologies have high speed but low precision. Using
these devices in synergy gives a significant improvement in the
measurement speed without loss of precision. The method of synergistic
integration of an advanced digitizer with a CMM is discussed.
Computational aspects of the inspection process are addressed next. Once
a part is measured, measurement data is compared against its
model to check for tolerances. This comparison is a time-consuming
process on conventional CPUs. We developed and benchmarked some GPU accelerations. Finally, naive data fitting methods can produce misleading results in cases with non-uniform data. Weighted total least-squares methods can compensate for non-uniformity. We show how they can be accelerated with GPUs, using plane fitting as an example. / Thesis / Doctor of Philosophy (PhD)
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