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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Přesnost zaměření fasády historického objektu metody, možnosti, podmínky / Accuracy of the facade of the historic building - methods, possibilities, conditions

DVOŘÁKOVÁ, Jitka January 2014 (has links)
This thesis deals with methods of surveying the facade of the historic building. The introductory section is a brief history of measurement and guidelines, as well as various methods are described from oldest to youngest, including their accuracy in targeting the facade. In more detail, a method for scanning and photogrammetry, which is currently the youngest methods used in surveying facades. In conclusion, the evaluation methods in terms of accuracy and usability. The aim is to describe and evaluace different methods of surveying from history to the present, including the necessary instruments and their accuracy.
2

Zpracování snímků pořízených z UAS / Processing of images taken from UAV

Roubal, Pavel January 2014 (has links)
The aim of the thesis was to process the images taken by UAS technology and especially to test the accuracy of this method on the checkpoints of various types. For this testing were used checkpoints that were measured by geodetic method. Subsequently these points were compared with points measured photogrammetrically.
3

Deflection measurements with 3D close range photogrammetry / Deformationsmätningar med 3D fotogrammetri

Defromont, Guillaume January 2021 (has links)
Photogrammetry is a great technology to check and track deformations on anysurface. This information is critical in many tranportation industries such as aeronautics and the automotive industry. In this thesis report photogrammetry measurements were done using 2 Aicon cameras providing 3D targets coordinates. The goal of this thesis was to ensure the best environment and positioning of the cameras to gather a good amount and quality of data. First positioning of the cameras is optimized by generating a map of the best projected areas that give the best coverage possible of the object. Then all the post processing was done with python using various mathematical methods to extract as much information as possible from the data recorded. First, data transformation to the correct coordinate system was performed using a sparse point-to-plane ICP algorithm. Then missing data was recovered by interpolating it over the time range. Finally raw deflections measurement were extracted and post processed to get essential information such as rigid body motion and static deformation. After an introduction about what is photogrammetry and why it is of high importance in transportation industries, this thesis tackles all the relative challenges that any photogrammetry specialist may face when dealing with such a technology. / Fotogrammetri är en bra teknologi för att kontrollera och spåra deformationer på olika ytor. Denna information är mycket viktig i flera transportindustrier som flyg och fordonsindustrin. I detta examensarbete genomfördes fotogrammetri med två Aicon kameror som ger koordinator för 3D mål. Målet med examensarbetet var att säkerställa så pass bra miljö och positionering av kamerorna som möjligt för att nå bra kvalité på data. Först är positioneringen av kamerorna optimerade genom att generera en karta av de bästa projiserade ytorna som ger den bästa täckningen av objektet. Sedan genomfördes post processing med pyton skript och olika matematiska metoder för att extrahera så mycket information som möjligt från datan. Först genomfördes koordinattransformation till rätt koordinatsystem genom en gles punkt-till-plan ICP algoritm. Sedan återskapades missad data genom interpolation över tid. Slutligen så extraherades deflektioner och post processades för att få viktig information så som stelkroppsrörelser och statisk deformation. Efter en introduktion om vad fotogrammetri är och varför det är viktigt för transportindutrin så tar detta examensarbete upp alla relativa utmaningar som alla fotogrammetriexperter kan tänkas stöta på när det arbetar med denna teknologi.
4

Vliv vlastností povodí vysokohorských jezer v Tatrách na chemizmus vody / Influence of catchment characteristics of high-mountain lakes in the Tatra Mountains on water chemistry

Hynštová, Marie January 2014 (has links)
The presented thesis deals with catchments of the alpine lakes in the High Tatra Mountains. The lakes were subject of a long-term monitoring to detect changes of chemical and biotic composition of lake water induced by acid atmospheric deposition and by its decline. The studied processes required a quantitative approach to describe the characteristics of the catchments. The definition of new catchment parameters or the refining estimated parameters was not allowed without current technical and computing equipment because of the complexity of mountainous terrain. The morphological parameters for 26 catchments were obtained by analysis of the created digital elevation model (DEM) using tools of geographic information system (GIS, software ESRI ArcGIS 10.2). The land cover was detected by Google aerial map (2014). The links between chemical composition (NO3⁻, Σ(Ca2+ +Mg2+ )) and catchment properties based on the specified or refined catchment parameters (slope, portion of an area with a slope <26 ř in the catchment, proportion of different land cover types to the real catchment area) were analysed between the years 1993 and 2012 (respectively 2006). New morphological parameters were derived for the defined catchments. The catchments on the northern and the southern slope were distinguished by...

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